Abstract
Quantum calculations within density functional theory have predicted a new structure of lanthanum hydride La2H24 that is dynamically stable up to pressures about 150 GPa. It is a semimetal and has a low symmetry of crystal lattice \(P\bar{1}\). An important feature of this structure is the existence of quasimolecular hydrogen chains, which leads to the presence of phonon frequencies of about 420 meV, exceeding the maximum vibration frequency of the metallic hydrogen Fddd phase (ω ~ 360 meV). These properties make it possible to expect a high superconducting transition temperature for lanthanum hydride La2H24.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. P. Drozdov, M. I. Eremets, I. A. Troyan, V. Ksenofontov, and S. I. Shylin, Nature 525, 73 (2015).
A.P. Drozdov, V.S. Minkov, S. P. Besedin, P. P. Kong, M. A. Kuzovnikov, D. A. Knyazev, and M. I. Eremets, arXiv:1808.07039.
M. Somayazulu, M. Ahart, A. Mishra, Z. M. Geballe, M. Baldini, Y. Meng, V. V. Struzhkin, and R. J. Hemley, Phys. Rev. Lett. 122, 027001 (2019).
A. P. Drozdov, P. P. Kong, V. S. Minkov, S. P. Besedin, M. A. Kuzovnikov, S. Mozaffari, L. Balicas, F. Balakirev, D. Graf, V. B. Prakapenka, E. Greenberg, D. A. Knyazev, M. Tkacz, and M. I. Eremets, arXiv:1812.01561.
H. Liu, I. I. Naumov, R. Hoffmann, N. W. Ashcroft, and R. J. Hemley, Proc. Natl. Acad. Sci. U. S. A. 114, 6990.(2017).
L. Liu, Ch. Wang, S. Yi, K. W. Kim, J. Kim, and J.- H. Cho, arXiv:1811.08548.
F. Peng, Y. Sun, C. J. Pickard, R. J. Needs, Q. Wu, and Y. Ma, Phys. Rev. Lett. 119, 107001 (2017).
I. A. Kruglov, D. V. Semenok, R. Szczesniak, M. Mahdi Davari Esfahani, A. G. Kvashnin, and A. R. Oganov, arXiv:1810.01113.
D. C. Langreth, B. I. Lundqvist, S. D. Chakarova-Kack, V. R. Cooper, M. Dion, P. Hyldgaard, A. Kelkkanen, J. Kleis, L. Kong, Sh. Li, P. G. Moses, E. Murray, A. Puzder, H. Rydberg, E. Schroder, and T. Thonhauser, J. Phys.: Condens. Matter 21, 395502 (2009).
P. Giannozzi, O. Andreussi, T. Brumme, et al., J. Phys.: Condens. Matter 29, 465901 (2017).
N. N. Degtyarenko, E. A. Mazur, and K. S. Grishakov, JETP Lett. 105, 664 (2017).
The Rare Earths, Ed. by F. H. Spedding and A. H. Daane (Wiley, New York, London, 1961).
E. G. Brovman, Yu. Kagan, and A. Kholas, Sov. Phys. JETP 34, 1300 (1972).
E. G. Brovman, Yu. Kagan, and A. Kholas, Sov. Phys. JETP 35, 783 (1972).
Yu. Kagan, V. V. Pushkarev, and A. Kholas, Sov. Phys. JETP 46, 511 (1977).
E. G. Brovman and Yu. M. Kagan, Sov. Phys. Usp. 17, 125.(1974).
Author information
Authors and Affiliations
Corresponding authors
Rights and permissions
About this article
Cite this article
Degtyarenko, N.N., Grishakov, K.S. & Mazur, E.A. “Tubular” Lanthanum Hydride: A New Class of High-Temperature Superconducting Materials. Jetp Lett. 109, 410–418 (2019). https://doi.org/10.1134/S0021364019060109
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0021364019060109