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First-principles investigation of the superconducting properties of thallium sulfide

机译:硫化铊超导性能的第一原理研究

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We conduct a theoretical, first-principles study of thallium sulfide with the space group FM-3M. We determine the electronic structure, phonon dispersion relations, Eliashberg spectral function, electron-phonon coupling constant (lambda) and any superconductivity. The results indicate that this structure is characterized by a much larger electronic density of states at the Fermi level. Both the norm-conserving pseudopotential and ultra-soft pseudopotential are used to study its superconducting properties. The transition temperatures (T-c) for superconductivity are 9.3 K and 4.2 K, while the electron-phonon coupling constants are 0.79 and 0.59, respectively. T-c does not increase with increasing pressure. The superconductivity disappears when the pressure reaches 80 GPa.
机译:我们开展理论,第一原理与空间组FM-3M的硫化物研究。 我们确定电子结构,声子色散关系,ELIASHBERG光谱功能,电子 - 声子耦合常数(LABDA)和任何超导电性。 结果表明,该结构的特征在于费米水平的状态更大的电子密度。 标准保守的假软障和超软伪软件都用于研究其超导性能。 超导性的过渡温度(T-C)为9.3k和4.2k,而电子 - 声子耦合常数分别为0.79和0.59。 T-C随着压力的增加而不会增加。 当压力达到80GPa时,超导性消失。

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