Physical Review Materials, volume 4, issue 8, publication number 084005
Interplay of charge density wave and multiband superconductivity in layered quasi-two-dimensional materials: The case of 2H−NbS2 and 2H−NbSe2
Majumdar Arnab
1
,
Brisbois Jérémy
3
,
Chareev D. A.
4, 5, 6
,
Chareev Dmitriy
4, 5, 6
,
Sadakov A.V.
7
,
Usol'tsev A.S.
7
,
Mito Masaki
8
,
Mito Masaki
8
,
Silhanek A.V.
3
,
Sarkar Tapati
9
,
Abdelwahab Hassan
10
,
Karis Olof
1
,
Ahuja Rajeev
1
,
Abdel-Hafiez Mahmoud
1, 2
,
Abdel-Hafiez M.
1, 2
2
Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
|
8
Graduate School of Engineering, Kyushu Institute of Technology, Fukuoka 804–8550, Japan
|
10
Faculty of science, Physics department, Fayoum University, 63514-Fayoum- Egypt
|
Publication type: Journal Article
Publication date: 2020-08-25
Journal:
Physical Review Materials
Quartile SCImago
Q1
Quartile WOS
Q3
Impact factor: 3.4
ISSN: 24759953
General Materials Science
Physics and Astronomy (miscellaneous)
Abstract
Despite intense efforts on all known quasi-two-dimensional superconductors, the origin and exact boundary of the electronic orderings, particularly charge density waves and superconductivity, are still attractive problems with several open questions. Here, in order to reveal how the superconducting gap evolves, we report on high quality complementary measurements of magneto-optical imaging, specific heat, magnetic susceptibility, resistivity measurements, Andreev spectroscopy, and London penetration depth ${\ensuremath{\lambda}}_{ab}(T)$ measurements supplemented with theoretical calculations for $2\mathrm{H}\text{\ensuremath{-}}\mathrm{Nb}{\mathrm{Se}}_{2}$ and $2\mathrm{H}\text{\ensuremath{-}}\mathrm{Nb}{\mathrm{S}}_{2}$ single crystals. The temperature dependence of ${\ensuremath{\lambda}}_{ab}(T)$ calculated from the lower critical field and Andreev spectroscopy can be well described by using a two-band model with $s$-wave-like gaps. The effect of pressure on the superconducting gap of both systems illustrates that both bands are practically affected. Upon compression, the Fermi surfaces do not change significantly, and the nesting remains almost unaffected compared to that at ambient condition. However, a strong bending in the upper critical fields (${H}_{\mathrm{c}2}$) curves is obtained under pressure and support the presence of a strong Pauli paramagnetic effect. In $\mathrm{Nb}{\mathrm{Se}}_{2}$, using a two-band model with $s$-wave-like gaps, the temperature dependence ${H}_{\mathrm{c}2}(T)$ can be properly described. In contrast to that, the behavior of ${H}_{\mathrm{c}2}$ for $\mathrm{Nb}{\mathrm{S}}_{2}$ is ruled by the spin paramagnetic effect. The estimated values of the penetration depth at $T=0\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ confirm that $\mathrm{Nb}{\mathrm{Se}}_{2}$ and $\mathrm{Nb}{\mathrm{S}}_{2}$ superconductors depart from a Uemura-style relationship between ${T}_{\mathrm{c}}$ with ${\mathbit{\ensuremath{\lambda}}}_{ab}^{\ensuremath{-}2}(T)$, the in-plane superconducting penetration depth.
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IOP Publishing
1 publication, 2.86%
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- We do not take into account publications that without a DOI.
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- Statistics recalculated weekly.
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Majumdar A. et al. Interplay of charge density wave and multiband superconductivity in layered quasi-two-dimensional materials: The case of 2H−NbS2 and 2H−NbSe2 // Physical Review Materials. 2020. Vol. 4. No. 8. 084005
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Majumdar A., Van Gennep D., Brisbois J., Chareev D., Chareev D. A., Sadakov A., Usol'tsev A., Mito M., Mito M., Silhanek A., Sarkar T., Abdelwahab H., Karis O., Ahuja R., Abdel-Hafiez M., Abdel-Hafiez M. Interplay of charge density wave and multiband superconductivity in layered quasi-two-dimensional materials: The case of 2H−NbS2 and 2H−NbSe2 // Physical Review Materials. 2020. Vol. 4. No. 8. 084005
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TY - JOUR
DO - 10.1103/PhysRevMaterials.4.084005
UR - https://doi.org/10.1103%2FPhysRevMaterials.4.084005
TI - Interplay of charge density wave and multiband superconductivity in layered quasi-two-dimensional materials: The case of 2H−NbS2 and 2H−NbSe2
T2 - Physical Review Materials
AU - Majumdar, Arnab
AU - Van Gennep, Derrick
AU - Brisbois, Jérémy
AU - Chareev, Dmitriy
AU - Sadakov, A.V.
AU - Usol'tsev, A.S.
AU - Mito, Masaki
AU - Silhanek, A.V.
AU - Sarkar, Tapati
AU - Abdelwahab, Hassan
AU - Karis, Olof
AU - Ahuja, Rajeev
AU - Abdel-Hafiez, Mahmoud
AU - Chareev, D. A.
AU - Mito, Masaki
AU - Abdel-Hafiez, M.
PY - 2020
DA - 2020/08/25 00:00:00
PB - American Physical Society (APS)
IS - 8
VL - 4
SN - 2475-9953
ER -
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@article{2020_Majumdar,
author = {Arnab Majumdar and Derrick Van Gennep and Jérémy Brisbois and Dmitriy Chareev and A.V. Sadakov and A.S. Usol'tsev and Masaki Mito and A.V. Silhanek and Tapati Sarkar and Hassan Abdelwahab and Olof Karis and Rajeev Ahuja and Mahmoud Abdel-Hafiez and D. A. Chareev and Masaki Mito and M. Abdel-Hafiez},
title = {Interplay of charge density wave and multiband superconductivity in layered quasi-two-dimensional materials: The case of 2H−NbS2 and 2H−NbSe2},
journal = {Physical Review Materials},
year = {2020},
volume = {4},
publisher = {American Physical Society (APS)},
month = {aug},
url = {https://doi.org/10.1103%2FPhysRevMaterials.4.084005},
number = {8},
doi = {10.1103/PhysRevMaterials.4.084005}
}