Unusual sulfur isotope effect and extremely high critical temperature in H(3)S superconductor

Recent experiments have set a new record for the transition temperature at which a material (hydrogen sulfide, H(3)S) becomes superconducting. Moreover, a pronounced isotope shift of T(C) in D(3)S 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 (32)S atoms by the heavier isotopes (33)S, (34)S and (36)S on the electronic properties, lattice dynamics and superconducting critical temperature of H(3)S. 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)(36)S at 155 GPa. This result brings us closer to the room temperature superconductivity.