Physical Review B, volume 102, issue 13, publication number 134510

Superconductivity and equation of state of lanthanum at megabar pressures

Chen Wuhao ¹

Semenok Dmitry V. ²

Semenok Dmitrii V ²

Troyan Ivan A. ³

Ivanova Anna G. ³

Ivanova Anna ³

Huang Xiaoli ¹

Oganov Artem R. ²

Tian Cui ^{1, 4}

Hide authors affiliations Show authors affiliations: 4 affiliations

State key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China |

Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, 3 Nobel Street, Moscow 143026, Russia |

Shubnikov Institute of Crystallography, Federal Scientific Research Center Crystallography and Photonics, Russian Academy of Sciences, Moscow 119333, 59 Leninskii Prospect, Russia

FSRC "Crystallography and photonics" of NRC «Kurchatov Institute»

Shubnikov Institute of Crystallography

⁴

School of Physical Science and Technology, Ningbo University, Ningbo 315211, China |

Publication type: Journal Article

Publication date: 2020-10-26

American Physical Society (APS)

Journal: Physical Review B

Quartile SCImago

Quartile WOS

Impact factor: 3.7

ISSN: 24699950, 24699969, 10980121, 1550235X

DOI: 10.1103/PhysRevB.102.134510

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Abstract

Lanthanum (La) is the first member of the lanthanoid that has recently raised considerable interest because of its unique La superhydride ${\mathrm{LaH}}_{10}$ and its own superconducting properties. There has been a lack of experimental evidence for the equation of state (EOS) and superconductivity of La at pressures exceeding one megabar. Here, we extend the pressure range up to 140 GPa to explore the EOS and superconductivity of La via the electrical resistance and x-ray diffraction measurements. We identified the phase transition sequences by the La Bail refinements of the experimental XRD patterns and discovered a distorted fcc-La phase (space group Fmmm) above 78 GPa with nonhydrostatic pressure transmitting media. All the experimental pressure-volume data were fitted by the third-order Birch-Murnaghan equation: ${V}_{0}=37.5\phantom{\rule{0.16em}{0ex}}{\AA{}}^{3}, {B}_{0}=14.5\phantom{\rule{0.16em}{0ex}}(1)\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$, and ${B}_{0}^{\ensuremath{'}}=5$. Superconductivity still existed in the distorted fcc-La with an onset critical temperature ${T}_{c}$ of 9.6 K at 78 GPa, which decreases to 2.2 K at 140 GPa. We calculated the superconducting parameters of La at several pressure points, and discussed the difference from experimetal ${T}_{c}$.

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Citations by publishers

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American Physical Society (APS)	American Physical Society (APS), 7, 25.93% American Physical Society (APS) 7 publications, 25.93%
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Springer Nature	Springer Nature, 4, 14.81% Springer Nature 4 publications, 14.81%
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IOP Publishing	IOP Publishing, 2, 7.41% IOP Publishing 2 publications, 7.41%
American Institute of Physics (AIP)	American Institute of Physics (AIP), 1, 3.7% American Institute of Physics (AIP) 1 publication, 3.7%
Multidisciplinary Digital Publishing Institute (MDPI)	Multidisciplinary Digital Publishing Institute (MDPI), 1, 3.7% Multidisciplinary Digital Publishing Institute (MDPI) 1 publication, 3.7%
Frontiers Media S.A.	Frontiers Media S.A., 1, 3.7% Frontiers Media S.A. 1 publication, 3.7%
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Chen W. et al. Superconductivity and equation of state of lanthanum at megabar pressures // Physical Review B. 2020. Vol. 102. No. 13. 134510

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Chen W., Semenok D. V., Semenok D. V., Troyan I. A., Ivanova A. G., Ivanova A., Huang X., Oganov A. R., Tian C. Superconductivity and equation of state of lanthanum at megabar pressures // Physical Review B. 2020. Vol. 102. No. 13. 134510

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RIS Copy

TY - JOUR

DO - 10.1103/PhysRevB.102.134510

UR - https://doi.org/10.1103%2FPhysRevB.102.134510

TI - Superconductivity and equation of state of lanthanum at megabar pressures

T2 - Physical Review B

AU - Chen, Wuhao

AU - Oganov, Artem R.

AU - Semenok, Dmitrii V

AU - Huang, Xiaoli

AU - Troyan, Ivan A.

AU - Ivanova, Anna G.

AU - Tian, Cui

AU - Semenok, Dmitry V.

AU - Ivanova, Anna

PY - 2020

DA - 2020/10/26 00:00:00

PB - American Physical Society (APS)

IS - 13

VL - 102

SN - 2469-9950

SN - 2469-9969

SN - 1098-0121

SN - 1550-235X

ER -

BibTex

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BibTex Copy

@article{2020_Chen,

author = {Wuhao Chen and Artem R. Oganov and Dmitrii V Semenok and Xiaoli Huang and Ivan A. Troyan and Anna G. Ivanova and Cui Tian and Dmitry V. Semenok and Anna Ivanova},

title = {Superconductivity and equation of state of lanthanum at megabar pressures},

journal = {Physical Review B},

year = {2020},

volume = {102},

publisher = {American Physical Society (APS)},

month = {oct},

url = {https://doi.org/10.1103%2FPhysRevB.102.134510},

number = {13},

doi = {10.1103/PhysRevB.102.134510}

}

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Publisher

American Physical Society (APS)

Journal

Physical Review B

Quartile SCImago

Quartile WOS

Impact factor

3.7

ISSN

24699950 (Print)
24699969 (Electronic)
10980121 (Print)
1550235X (Electronic)

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