High-Pressure Synthesis of Magnetic Neodymium Polyhydrides

Zhou D., Semenok D.V., Xie H., Huang X., Duan D., Aperis A., Oppeneer P.M., Galasso M., Kartsev A.I., Kvashnin A.G., Oganov A.R., Cui T.
Тип документаJournal Article
Дата публикации2020-01-22
Название журналаJournal of the American Chemical Society
ИздательAmerican Chemical Society
КвартильQ1
ISSN00027863, 15205126
  • General Chemistry
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry
Краткое описание
The current search for room-temperature superconductivity is inspired by the unique properties of the electron-phonon interaction in metal superhydrides. Encouraged by the recently found highest-TC superconductor fcc-LaH10, here we discover several superhydrides of another lanthanide - neodymium. We identify three novel metallic Nd-H phases at pressures range from 85 to 135 GPa: I4/mmm-NdH4, C2/с-NdH7, and P63/mmc-NdH9, synthesized by laser-heating metal samples in NH3BH3 media for in situ generation of hydrogen. A lower trihydride Fm3 ̅m-NdH3 is found at pressures from 2 to 52 GPa. I4/mmm-NdH4 and C2/с-NdH7 are stable from 135 down to 85 GPa, and P63/mmc-NdH9 from 110 to 130 GPa. Measurements of the electrical resistance of NdH9 demonstrate a possible superconducting transition at ~ 4.5 K in P63/mmc-NdH9. Our theoretical calculations predict that all the neodymium hydrides have antiferromagnetic order at pressures below 150 GPa and represent one of the first discovered examples of strongly correlated superhydrides with large exchange spin-splitting in the electron band structure (> 450 meV). The critical Néel temperatures for new neodymium hydrides are estimated using the mean-field approximation as about 200 K (NdH4), 180 K (NdH7) and 400 K (NdH9).
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1. Zhou D. и др. High-Pressure Synthesis of Magnetic Neodymium Polyhydrides // Journal of the American Chemical Society. 2020. Т. 142. № 6. С. 2803–2811.
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TY - JOUR

DO - 10.1021/jacs.9b10439

UR - http://dx.doi.org/10.1021/jacs.9b10439

TI - High-Pressure Synthesis of Magnetic Neodymium Polyhydrides

T2 - Journal of the American Chemical Society

AU - Zhou, Di

AU - Semenok, Dmitrii V.

AU - Xie, Hui

AU - Huang, Xiaoli

AU - Duan, Defang

AU - Aperis, Alex

AU - Oppeneer, Peter M.

AU - Galasso, Michele

AU - Kartsev, Alexey I.

AU - Kvashnin, Alexander G.

AU - Oganov, Artem R.

AU - Cui, Tian

PY - 2020

DA - 2020/01/22

PB - American Chemical Society (ACS)

SP - 2803-2811

IS - 6

VL - 142

SN - 0002-7863

SN - 1520-5126

ER -

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@article{Zhou_2020,

doi = {10.1021/jacs.9b10439},

url = {https://doi.org/10.1021%2Fjacs.9b10439},

year = 2020,

month = {jan},

publisher = {American Chemical Society ({ACS})},

volume = {142},

number = {6},

pages = {2803--2811},

author = {Di Zhou and Dmitrii V. Semenok and Hui Xie and Xiaoli Huang and Defang Duan and Alex Aperis and Peter M. Oppeneer and Michele Galasso and Alexey I. Kartsev and Alexander G. Kvashnin and Artem R. Oganov and Tian Cui},

title = {High-Pressure Synthesis of Magnetic Neodymium Polyhydrides},

journal = {Journal of the American Chemical Society}

}

MLA
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Zhou, Di et al. “High-Pressure Synthesis of Magnetic Neodymium Polyhydrides.” Journal of the American Chemical Society 142.6 (2020): 2803–2811. Crossref. Web.