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High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride.
Sun, Dan; Minkov, Vasily S; Mozaffari, Shirin; Sun, Ying; Ma, Yanming; Chariton, Stella; Prakapenka, Vitali B; Eremets, Mikhail I; Balicas, Luis; Balakirev, Fedor F.
Afiliación
  • Sun D; National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM, USA. ustsundan@gmail.com.
  • Minkov VS; Max-Planck Institute for Chemistry, Mainz, Germany.
  • Mozaffari S; National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA.
  • Sun Y; International Center for Computational Method and Software, College of Physics, Jilin University, 130012, Changchun, China.
  • Ma Y; International Center for Computational Method and Software, College of Physics, Jilin University, 130012, Changchun, China.
  • Chariton S; State Key Laboratory of Superhard Materials, College of Physics, Jilin University, 130012, Changchun, China.
  • Prakapenka VB; International Center of Future Science, Jilin University, 130012, Changchun, China.
  • Eremets MI; Center for Advanced Radiation Sources, University of Chicago, Chicago, IL, USA.
  • Balicas L; Center for Advanced Radiation Sources, University of Chicago, Chicago, IL, USA.
  • Balakirev FF; Max-Planck Institute for Chemistry, Mainz, Germany.
Nat Commun ; 12(1): 6863, 2021 Nov 25.
Article en En | MEDLINE | ID: mdl-34824193
The possibility of high, room-temperature superconductivity was predicted for metallic hydrogen in the 1960s. However, metallization and superconductivity of hydrogen are yet to be unambiguously demonstrated and may require pressures as high as 5 million atmospheres. Rare earth based "superhydrides", such as LaH10, can be considered as a close approximation of metallic hydrogen even though they form at moderately lower pressures. In superhydrides the predominance of H-H metallic bonds and high superconducting transition temperatures bear the hallmarks of metallic hydrogen. Still, experimental studies revealing the key factors controlling their superconductivity are scarce. Here, we report the pressure and magnetic field dependence of the superconducting order observed in LaH10. We determine that the high-symmetry high-temperature superconducting Fm-3m phase of LaH10 can be stabilized at substantially lower pressures than previously thought. We find a remarkable correlation between superconductivity and a structural instability indicating that lattice vibrations, responsible for the monoclinic structural distortions in LaH10, strongly affect the superconducting coupling.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido