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Cover Picture: Ann. Phys. 5'2016
Publication year - 2016
Publication title -
annalen der physik
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.201670025
Subject(s) - superconductivity , dimensionless quantity , cover (algebra) , physics , london penetration depth , condensed matter physics , theoretical physics , formalism (music) , hydrogen , statistical physics , computer science , thermodynamics , quantum mechanics , mechanical engineering , art , musical , engineering , visual arts
Hydrogen‐rich compounds are extensively explored as candidates for high‐temperature superconductors. Recently, hydrogen sulfide (H 3 S), compressed in a diamond anvil cell, was experimentally found to show the loss of resistance at the critical temperature of 203 K. It opens the door to achieving room‐temperature superconductivity in these types of materials. This paper investigates the thermodynamic properties of superconducting hydrogen and deuterium sulfide at 150 GPa. In particular, the energy gap, specific heat jump, thermodynamic critical field and London penetration depth were calculated within the framework of the Eliashberg formalism. Then, these parameters were used to estimate the dimensionless ratios which exceed the predictions of the Bardeen‐Cooper‐Schrieffer theory. These discrepancies arise from the existence of the strong‐coupling and retardation effects in the systems investigated. The Eliashberg theory goes beyond the BCS theory to include these effects. The results presented in this paper are expected to stimulate experimental and theoretical exploration and discovery of new superconducting hydrogen‐containing materials like H 3 S.