Unusual sulfur isotope effect and extremely high critical temperature in H3S superconductor

作者：Szczesniak Radoslaw; Durajski Artur P^*

来源：Scientific Reports, 2018, 8(1): 6037.

DOI：10.1038/s41598-018-24442-8

Recent experiments have set a new record for the transition temperature at which a material (hydrogen sulfide, H3S) becomes superconducting. Moreover, a pronounced isotope shift of T-C in D3S is evidence of an existence of phonon-mediated pairing mechanism of superconductivity that is consistent with the well established Bardeen-Cooper-Schrieffer scenario. Herein, we reported a theoretical studies of the influence of the substitution of S-32 atoms by the heavier isotopes S-33, S-34 and S-36 on the electronic properties, lattice dynamics and superconducting critical temperature of H3S. There are two equally fundamental results presented in this paper. The first one is an anomalous sulfur-derived superconducting isotope effect, which, if observed experimentally, will be subsequent argument that proves to the classical electron-phonon interaction. The second one is fact that critical temperature rise to extremely high value of 242 K for H-3 S-36 at 155 GPa. This result brings us closer to the room temperature superconductivity.

• 出版日期2018-4-16