Physical Review B, том 102, издание 13, номер публикации 134510

Superconductivity and equation of state of lanthanum at megabar pressures

Chen Wuhao 1
Semenok Dmitrii V 2
Ivanova Anna G. 3
Ivanova Anna 3
Huang Xiaoli 1
Tian Cui 1, 4
Тип публикацииJournal Article
Дата публикации2020-10-26
American Physical Society (APS)
American Physical Society (APS)
ЖурналPhysical Review B
Квартиль SCImagoQ1
Квартиль WOSQ2
Impact factor3.7
ISSN24699950, 24699969, 10980121, 1550235X
Краткое описание
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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Chen W. et al. Superconductivity and equation of state of lanthanum at megabar pressures // Physical Review B. 2020. Vol. 102. No. 13. 134510
ГОСТ со всеми авторами (до 50) Скопировать
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
RIS |
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TY - JOUR
DO - 10.1103/PhysRevB.102.134510
UR - https://doi.org/10.1103/PhysRevB.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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@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/PhysRevB.102.134510},
number = {13},
doi = {10.1103/PhysRevB.102.134510}
}
MLA
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Chen, Wuhao, et al. “Superconductivity and Equation of State of Lanthanum at Megabar Pressures.” Physical Review B, vol. 102, no. 13, Oct. 2020. Crossref, https://doi.org/10.1103/physrevb.102.134510.