Leibniz Institute for Crystal Growth

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Short name

IKZ

Country, city

Germany, Berlin

037p86664

Organization website

Publications

1 406

Citations

31 558

h-index

Top-3 journals

Journal of Crystal Growth (131 publications)

Applied Physics Letters (98 publications)

Journal of Applied Physics (73 publications)

Top-3 organizations

Cornell University (148 publications)

Humboldt University of Berlin (117 publications)

Technical University of Berlin (65 publications)

Top-3 foreign organizations

Cornell University (148 publications)

Simon Fraser University (50 publications)

Ioffe Physical-Technical Institute of the Russian Academy of Sciences (49 publications)

Most cited in 5 years

Found

Publication title

Publisher

Journal

Countries

Found

Since 1995

Total publications

1406

Total citations

31558

Citations per publication

22.45

Average publications per year

43.94

Average authors per publication

8.54

h-index

Metrics description

h-index

A scientist has an h-index if h of his N publications are cited at least h times each, while the remaining (N - h) publications are cited no more than h times each.

https://www.pnas.org/doi/full/10.1073/pnas.0507655102

Top-30

Fields of science

	100 200 300 400 500 600
Condensed Matter Physics	Condensed Matter Physics, 519, 36.91% Condensed Matter Physics 519 publications, 36.91%
General Materials Science	General Materials Science, 331, 23.54% General Materials Science 331 publications, 23.54%
Electronic, Optical and Magnetic Materials	Electronic, Optical and Magnetic Materials, 220, 15.65% Electronic, Optical and Magnetic Materials 220 publications, 15.65%
Materials Chemistry	Materials Chemistry, 217, 15.43% Materials Chemistry 217 publications, 15.43%
General Physics and Astronomy	General Physics and Astronomy, 169, 12.02% General Physics and Astronomy 169 publications, 12.02%
General Chemistry	General Chemistry, 160, 11.38% General Chemistry 160 publications, 11.38%
Inorganic Chemistry	Inorganic Chemistry, 158, 11.24% Inorganic Chemistry 158 publications, 11.24%
Atomic and Molecular Physics, and Optics	Atomic and Molecular Physics, and Optics, 129, 9.17% Atomic and Molecular Physics, and Optics 129 publications, 9.17%
Physics and Astronomy (miscellaneous)	Physics and Astronomy (miscellaneous), 129, 9.17% Physics and Astronomy (miscellaneous) 129 publications, 9.17%
Electrical and Electronic Engineering	Electrical and Electronic Engineering, 116, 8.25% Electrical and Electronic Engineering 116 publications, 8.25%
Surfaces, Coatings and Films	Surfaces, Coatings and Films, 86, 6.12% Surfaces, Coatings and Films 86 publications, 6.12%
Mechanical Engineering	Mechanical Engineering, 79, 5.62% Mechanical Engineering 79 publications, 5.62%
Mechanics of Materials	Mechanics of Materials, 72, 5.12% Mechanics of Materials 72 publications, 5.12%
Surfaces and Interfaces	Surfaces and Interfaces, 63, 4.48% Surfaces and Interfaces 63 publications, 4.48%
General Engineering	General Engineering, 62, 4.41% General Engineering 62 publications, 4.41%
Instrumentation	Instrumentation, 39, 2.77% Instrumentation 39 publications, 2.77%
Metals and Alloys	Metals and Alloys, 36, 2.56% Metals and Alloys 36 publications, 2.56%
Multidisciplinary	Multidisciplinary, 31, 2.2% Multidisciplinary 31 publications, 2.2%
General Chemical Engineering	General Chemical Engineering, 30, 2.13% General Chemical Engineering 30 publications, 2.13%
Physical and Theoretical Chemistry	Physical and Theoretical Chemistry, 29, 2.06% Physical and Theoretical Chemistry 29 publications, 2.06%
General Biochemistry, Genetics and Molecular Biology	General Biochemistry, Genetics and Molecular Biology, 19, 1.35% General Biochemistry, Genetics and Molecular Biology 19 publications, 1.35%
Bioengineering	Bioengineering, 18, 1.28% Bioengineering 18 publications, 1.28%
Renewable Energy, Sustainability and the Environment	Renewable Energy, Sustainability and the Environment, 15, 1.07% Renewable Energy, Sustainability and the Environment 15 publications, 1.07%
Ceramics and Composites	Ceramics and Composites, 14, 1% Ceramics and Composites 14 publications, 1%
General Medicine	General Medicine, 14, 1% General Medicine 14 publications, 1%
Spectroscopy	Spectroscopy, 13, 0.92% Spectroscopy 13 publications, 0.92%
General Environmental Science	General Environmental Science, 13, 0.92% General Environmental Science 13 publications, 0.92%
General Earth and Planetary Sciences	General Earth and Planetary Sciences, 13, 0.92% General Earth and Planetary Sciences 13 publications, 0.92%
Biomaterials	Biomaterials, 12, 0.85% Biomaterials 12 publications, 0.85%
Nuclear and High Energy Physics	Nuclear and High Energy Physics, 11, 0.78% Nuclear and High Energy Physics 11 publications, 0.78%
	100 200 300 400 500 600

Journals

	20 40 60 80 100 120 140
Journal of Crystal Growth	Journal of Crystal Growth, 131, 9.32% Journal of Crystal Growth 131 publications, 9.32%
Applied Physics Letters	Applied Physics Letters, 98, 6.97% Applied Physics Letters 98 publications, 6.97%
Journal of Applied Physics	Journal of Applied Physics, 73, 5.19% Journal of Applied Physics 73 publications, 5.19%
Physical Review B	Physical Review B, 70, 4.98% Physical Review B 70 publications, 4.98%
Crystal Research and Technology	Crystal Research and Technology, 49, 3.49% Crystal Research and Technology 49 publications, 3.49%
Physica Status Solidi (A) Applications and Materials Science	Physica Status Solidi (A) Applications and Materials Science, 39, 2.77% Physica Status Solidi (A) Applications and Materials Science 39 publications, 2.77%
APL Materials	APL Materials, 38, 2.7% APL Materials 38 publications, 2.7%
Physical Review Materials	Physical Review Materials, 30, 2.13% Physical Review Materials 30 publications, 2.13%
Solid State Phenomena	Solid State Phenomena, 28, 1.99% Solid State Phenomena 28 publications, 1.99%
Semiconductors	Semiconductors, 25, 1.78% Semiconductors 25 publications, 1.78%
CrystEngComm	CrystEngComm, 24, 1.71% CrystEngComm 24 publications, 1.71%
Optics Express	Optics Express, 21, 1.49% Optics Express 21 publications, 1.49%
Nature Communications	Nature Communications, 17, 1.21% Nature Communications 17 publications, 1.21%
Optical Materials Express	Optical Materials Express, 17, 1.21% Optical Materials Express 17 publications, 1.21%
Physica Status Solidi (B): Basic Research	Physica Status Solidi (B): Basic Research, 17, 1.21% Physica Status Solidi (B): Basic Research 17 publications, 1.21%
Crystals	Crystals, 17, 1.21% Crystals 17 publications, 1.21%
Materials Science Forum	Materials Science Forum, 16, 1.14% Materials Science Forum 16 publications, 1.14%
Physical Review Letters	Physical Review Letters, 16, 1.14% Physical Review Letters 16 publications, 1.14%
Crystal Growth and Design	Crystal Growth and Design, 14, 1% Crystal Growth and Design 14 publications, 1%
Advanced Materials	Advanced Materials, 14, 1% Advanced Materials 14 publications, 1%
ECS Meeting Abstracts	ECS Meeting Abstracts, 14, 1% ECS Meeting Abstracts 14 publications, 1%
Thin Solid Films	Thin Solid Films, 12, 0.85% Thin Solid Films 12 publications, 0.85%
physica status solidi (c)	physica status solidi (c), 12, 0.85% physica status solidi (c) 12 publications, 0.85%
Optics Letters	Optics Letters, 11, 0.78% Optics Letters 11 publications, 0.78%
Microscopy and Microanalysis	Microscopy and Microanalysis, 11, 0.78% Microscopy and Microanalysis 11 publications, 0.78%
Scientific Reports	Scientific Reports, 11, 0.78% Scientific Reports 11 publications, 0.78%
Физика и техника полупроводников	Физика и техника полупроводников, 11, 0.78% Физика и техника полупроводников 11 publications, 0.78%
Nanotechnology	Nanotechnology, 10, 0.71% Nanotechnology 10 publications, 0.71%
ACS applied materials & interfaces	ACS applied materials & interfaces, 9, 0.64% ACS applied materials & interfaces 9 publications, 0.64%
Journal of Physics: Conference Series	Journal of Physics: Conference Series, 9, 0.64% Journal of Physics: Conference Series 9 publications, 0.64%
	20 40 60 80 100 120 140

Publishers

	50 100 150 200 250 300
Elsevier	Elsevier, 287, 20.41% Elsevier 287 publications, 20.41%
AIP Publishing	AIP Publishing, 227, 16.15% AIP Publishing 227 publications, 16.15%
Wiley	Wiley, 200, 14.22% Wiley 200 publications, 14.22%
American Physical Society (APS)	American Physical Society (APS), 142, 10.1% American Physical Society (APS) 142 publications, 10.1%
Springer Nature	Springer Nature, 104, 7.4% Springer Nature 104 publications, 7.4%
Optica Publishing Group	Optica Publishing Group, 56, 3.98% Optica Publishing Group 56 publications, 3.98%
American Chemical Society (ACS)	American Chemical Society (ACS), 54, 3.84% American Chemical Society (ACS) 54 publications, 3.84%
Trans Tech Publications	Trans Tech Publications, 46, 3.27% Trans Tech Publications 46 publications, 3.27%
IOP Publishing	IOP Publishing, 46, 3.27% IOP Publishing 46 publications, 3.27%
Royal Society of Chemistry (RSC)	Royal Society of Chemistry (RSC), 39, 2.77% Royal Society of Chemistry (RSC) 39 publications, 2.77%
Pleiades Publishing	Pleiades Publishing, 37, 2.63% Pleiades Publishing 37 publications, 2.63%
MDPI	MDPI, 23, 1.64% MDPI 23 publications, 1.64%
The Electrochemical Society	The Electrochemical Society, 23, 1.64% The Electrochemical Society 23 publications, 1.64%
International Union of Crystallography (IUCr)	International Union of Crystallography (IUCr), 15, 1.07% International Union of Crystallography (IUCr) 15 publications, 1.07%
Japan Society of Applied Physics	Japan Society of Applied Physics, 13, 0.92% Japan Society of Applied Physics 13 publications, 0.92%
Oxford University Press	Oxford University Press, 12, 0.85% Oxford University Press 12 publications, 0.85%
Ioffe Institute Russian Academy of Sciences	Ioffe Institute Russian Academy of Sciences, 12, 0.85% Ioffe Institute Russian Academy of Sciences 12 publications, 0.85%
Institute of Electrical and Electronics Engineers (IEEE)	Institute of Electrical and Electronics Engineers (IEEE), 10, 0.71% Institute of Electrical and Electronics Engineers (IEEE) 10 publications, 0.71%
Walter de Gruyter	Walter de Gruyter, 9, 0.64% Walter de Gruyter 9 publications, 0.64%
EDP Sciences	EDP Sciences, 9, 0.64% EDP Sciences 9 publications, 0.64%
American Vacuum Society	American Vacuum Society, 9, 0.64% American Vacuum Society 9 publications, 0.64%
Taylor & Francis	Taylor & Francis, 7, 0.5% Taylor & Francis 7 publications, 0.5%
American Association for the Advancement of Science (AAAS)	American Association for the Advancement of Science (AAAS), 7, 0.5% American Association for the Advancement of Science (AAAS) 7 publications, 0.5%
SPIE-Intl Soc Optical Eng	SPIE-Intl Soc Optical Eng, 4, 0.28% SPIE-Intl Soc Optical Eng 4 publications, 0.28%
Proceedings of the National Academy of Sciences (PNAS)	Proceedings of the National Academy of Sciences (PNAS), 2, 0.14% Proceedings of the National Academy of Sciences (PNAS) 2 publications, 0.14%
Beilstein-Institut	Beilstein-Institut, 2, 0.14% Beilstein-Institut 2 publications, 0.14%
Institute of Physics, Polish Academy of Sciences	Institute of Physics, Polish Academy of Sciences, 2, 0.14% Institute of Physics, Polish Academy of Sciences 2 publications, 0.14%
Cambridge University Press	Cambridge University Press, 1, 0.07% Cambridge University Press 1 publication, 0.07%
World Scientific	World Scientific, 1, 0.07% World Scientific 1 publication, 0.07%
Begell House	Begell House, 1, 0.07% Begell House 1 publication, 0.07%
	50 100 150 200 250 300

With other organizations

	20 40 60 80 100 120 140 160
Cornell University	Cornell University, 148, 10.53% Cornell University 148 publications, 10.53%
Humboldt University of Berlin	Humboldt University of Berlin, 117, 8.32% Humboldt University of Berlin 117 publications, 8.32%
Technical University of Berlin	Technical University of Berlin, 65, 4.62% Technical University of Berlin 65 publications, 4.62%
German Aerospace Center	German Aerospace Center, 62, 4.41% German Aerospace Center 62 publications, 4.41%
Simon Fraser University	Simon Fraser University, 50, 3.56% Simon Fraser University 50 publications, 3.56%
Ioffe Physical-Technical Institute of the Russian Academy of Sciences	Ioffe Physical-Technical Institute of the Russian Academy of Sciences, 49, 3.49% Ioffe Physical-Technical Institute of the Russian Academy of Sciences 49 publications, 3.49%
Ferdinand-Braun-Institute, Leibniz-Institut für Höchstfrequenztechnik	Ferdinand-Braun-Institute, Leibniz-Institut für Höchstfrequenztechnik, 44, 3.13% Ferdinand-Braun-Institute, Leibniz-Institut für Höchstfrequenztechnik 44 publications, 3.13%
Technische Universität Dresden	Technische Universität Dresden, 42, 2.99% Technische Universität Dresden 42 publications, 2.99%
Institute for Physics of Microstructures of the Russian Academy of Sciences	Institute for Physics of Microstructures of the Russian Academy of Sciences, 37, 2.63% Institute for Physics of Microstructures of the Russian Academy of Sciences 37 publications, 2.63%
Pennsylvania State University	Pennsylvania State University, 36, 2.56% Pennsylvania State University 36 publications, 2.56%
Physikalisch-Technische Bundesanstalt	Physikalisch-Technische Bundesanstalt, 34, 2.42% Physikalisch-Technische Bundesanstalt 34 publications, 2.42%
Lawrence Berkeley National Laboratory	Lawrence Berkeley National Laboratory, 33, 2.35% Lawrence Berkeley National Laboratory 33 publications, 2.35%
Forschungszentrum Jülich	Forschungszentrum Jülich, 31, 2.2% Forschungszentrum Jülich 31 publications, 2.2%
Helmholtz Centre for Materials and Energy	Helmholtz Centre for Materials and Energy, 30, 2.13% Helmholtz Centre for Materials and Energy 30 publications, 2.13%
Clausthal University of Technology	Clausthal University of Technology, 28, 1.99% Clausthal University of Technology 28 publications, 1.99%
Innovations for High Performance Microelectronics (Leibniz Institute for High Performance Microelectronics)	Innovations for High Performance Microelectronics (Leibniz Institute for High Performance Microelectronics), 27, 1.92% Innovations for High Performance Microelectronics (Leibniz Institute for High Performance Microelectronics) 27 publications, 1.92%
Institute of High Pressure Physics of the Polish Academy of Sciences	Institute of High Pressure Physics of the Polish Academy of Sciences, 26, 1.85% Institute of High Pressure Physics of the Polish Academy of Sciences 26 publications, 1.85%
Radboud University Nijmegen	Radboud University Nijmegen, 25, 1.78% Radboud University Nijmegen 25 publications, 1.78%
European Synchrotron Radiation Facility	European Synchrotron Radiation Facility, 24, 1.71% European Synchrotron Radiation Facility 24 publications, 1.71%
G.G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences	G.G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 23, 1.64% G.G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences 23 publications, 1.64%
Argonne National Laboratory	Argonne National Laboratory, 23, 1.64% Argonne National Laboratory 23 publications, 1.64%
Max Planck Institute for Solid State Research	Max Planck Institute for Solid State Research, 23, 1.64% Max Planck Institute for Solid State Research 23 publications, 1.64%
Lobachevsky State University of Nizhny Novgorod	Lobachevsky State University of Nizhny Novgorod, 21, 1.49% Lobachevsky State University of Nizhny Novgorod 21 publications, 1.49%
Helmholtz-Zentrum Dresden-Rossendorf	Helmholtz-Zentrum Dresden-Rossendorf, 21, 1.49% Helmholtz-Zentrum Dresden-Rossendorf 21 publications, 1.49%
University of California, Berkeley	University of California, Berkeley, 21, 1.49% University of California, Berkeley 21 publications, 1.49%
Keio University	Keio University, 21, 1.49% Keio University 21 publications, 1.49%
RWTH Aachen University	RWTH Aachen University, 20, 1.42% RWTH Aachen University 20 publications, 1.42%
Freiberg University of Mining and Technology	Freiberg University of Mining and Technology, 19, 1.35% Freiberg University of Mining and Technology 19 publications, 1.35%
Technical University of Munich	Technical University of Munich, 18, 1.28% Technical University of Munich 18 publications, 1.28%
Linköping University	Linköping University, 18, 1.28% Linköping University 18 publications, 1.28%
	20 40 60 80 100 120 140 160

With foreign organizations

	20 40 60 80 100 120 140 160
Cornell University	Cornell University, 148, 10.53% Cornell University 148 publications, 10.53%
Simon Fraser University	Simon Fraser University, 50, 3.56% Simon Fraser University 50 publications, 3.56%
Ioffe Physical-Technical Institute of the Russian Academy of Sciences	Ioffe Physical-Technical Institute of the Russian Academy of Sciences, 49, 3.49% Ioffe Physical-Technical Institute of the Russian Academy of Sciences 49 publications, 3.49%
Institute for Physics of Microstructures of the Russian Academy of Sciences	Institute for Physics of Microstructures of the Russian Academy of Sciences, 37, 2.63% Institute for Physics of Microstructures of the Russian Academy of Sciences 37 publications, 2.63%
Pennsylvania State University	Pennsylvania State University, 36, 2.56% Pennsylvania State University 36 publications, 2.56%
Lawrence Berkeley National Laboratory	Lawrence Berkeley National Laboratory, 33, 2.35% Lawrence Berkeley National Laboratory 33 publications, 2.35%
Institute of High Pressure Physics of the Polish Academy of Sciences	Institute of High Pressure Physics of the Polish Academy of Sciences, 26, 1.85% Institute of High Pressure Physics of the Polish Academy of Sciences 26 publications, 1.85%
Radboud University Nijmegen	Radboud University Nijmegen, 25, 1.78% Radboud University Nijmegen 25 publications, 1.78%
European Synchrotron Radiation Facility	European Synchrotron Radiation Facility, 24, 1.71% European Synchrotron Radiation Facility 24 publications, 1.71%
G.G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences	G.G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 23, 1.64% G.G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences 23 publications, 1.64%
Argonne National Laboratory	Argonne National Laboratory, 23, 1.64% Argonne National Laboratory 23 publications, 1.64%
Lobachevsky State University of Nizhny Novgorod	Lobachevsky State University of Nizhny Novgorod, 21, 1.49% Lobachevsky State University of Nizhny Novgorod 21 publications, 1.49%
University of California, Berkeley	University of California, Berkeley, 21, 1.49% University of California, Berkeley 21 publications, 1.49%
Keio University	Keio University, 21, 1.49% Keio University 21 publications, 1.49%
Linköping University	Linköping University, 18, 1.28% Linköping University 18 publications, 1.28%
University of California, Santa Barbara	University of California, Santa Barbara, 18, 1.28% University of California, Santa Barbara 18 publications, 1.28%
Peter the Great St. Petersburg Polytechnic University	Peter the Great St. Petersburg Polytechnic University, 17, 1.21% Peter the Great St. Petersburg Polytechnic University 17 publications, 1.21%
University of Nebraska–Lincoln	University of Nebraska–Lincoln, 17, 1.21% University of Nebraska–Lincoln 17 publications, 1.21%
Graz University of Technology	Graz University of Technology, 16, 1.14% Graz University of Technology 16 publications, 1.14%
Xi'an Jiaotong University	Xi'an Jiaotong University, 15, 1.07% Xi'an Jiaotong University 15 publications, 1.07%
University College London	University College London, 14, 1% University College London 14 publications, 1%
University of Oxford	University of Oxford, 14, 1% University of Oxford 14 publications, 1%
Institute of Physics of the Czech Academy of Sciences	Institute of Physics of the Czech Academy of Sciences, 14, 1% Institute of Physics of the Czech Academy of Sciences 14 publications, 1%
Aalto University	Aalto University, 12, 0.85% Aalto University 12 publications, 0.85%
University of New South Wales	University of New South Wales, 12, 0.85% University of New South Wales 12 publications, 0.85%
University of Wisconsin–Madison	University of Wisconsin–Madison, 12, 0.85% University of Wisconsin–Madison 12 publications, 0.85%
University of Arkansas at Fayetteville	University of Arkansas at Fayetteville, 12, 0.85% University of Arkansas at Fayetteville 12 publications, 0.85%
Norwegian University of Science and Technology	Norwegian University of Science and Technology, 11, 0.78% Norwegian University of Science and Technology 11 publications, 0.78%
Massachusetts Institute of Technology	Massachusetts Institute of Technology, 11, 0.78% Massachusetts Institute of Technology 11 publications, 0.78%
Stanford University	Stanford University, 11, 0.78% Stanford University 11 publications, 0.78%
	20 40 60 80 100 120 140 160

With other countries

	50 100 150 200 250 300
USA	USA, 273, 19.42% USA 273 publications, 19.42%
Russia	Russia, 154, 10.95% Russia 154 publications, 10.95%
United Kingdom	United Kingdom, 80, 5.69% United Kingdom 80 publications, 5.69%
Canada	Canada, 66, 4.69% Canada 66 publications, 4.69%
France	France, 58, 4.13% France 58 publications, 4.13%
Italy	Italy, 54, 3.84% Italy 54 publications, 3.84%
Japan	Japan, 53, 3.77% Japan 53 publications, 3.77%
Poland	Poland, 51, 3.63% Poland 51 publications, 3.63%
China	China, 41, 2.92% China 41 publications, 2.92%
Switzerland	Switzerland, 38, 2.7% Switzerland 38 publications, 2.7%
Netherlands	Netherlands, 37, 2.63% Netherlands 37 publications, 2.63%
Austria	Austria, 34, 2.42% Austria 34 publications, 2.42%
Ukraine	Ukraine, 29, 2.06% Ukraine 29 publications, 2.06%
Sweden	Sweden, 28, 1.99% Sweden 28 publications, 1.99%
Spain	Spain, 26, 1.85% Spain 26 publications, 1.85%
Czech Republic	Czech Republic, 25, 1.78% Czech Republic 25 publications, 1.78%
Republic of Korea	Republic of Korea, 24, 1.71% Republic of Korea 24 publications, 1.71%
Brazil	Brazil, 18, 1.28% Brazil 18 publications, 1.28%
Norway	Norway, 17, 1.21% Norway 17 publications, 1.21%
Australia	Australia, 15, 1.07% Australia 15 publications, 1.07%
Belgium	Belgium, 15, 1.07% Belgium 15 publications, 1.07%
Bulgaria	Bulgaria, 13, 0.92% Bulgaria 13 publications, 0.92%
Finland	Finland, 13, 0.92% Finland 13 publications, 0.92%
Portugal	Portugal, 12, 0.85% Portugal 12 publications, 0.85%
Israel	Israel, 12, 0.85% Israel 12 publications, 0.85%
Belarus	Belarus, 11, 0.78% Belarus 11 publications, 0.78%
Singapore	Singapore, 9, 0.64% Singapore 9 publications, 0.64%
Ireland	Ireland, 8, 0.57% Ireland 8 publications, 0.57%
Hungary	Hungary, 7, 0.5% Hungary 7 publications, 0.5%
	50 100 150 200 250 300

We do not take into account publications without a DOI.
Statistics recalculated daily.
Publications published earlier than 1995 are ignored in the statistics.
The horizontal charts show the 30 top positions.
Journals quartiles values are relevant at the moment.