论文标题
碳硫硫氢化物190 K超导体中的电子偶联常数，费米温度和非常规的超导性
The electron-phonon coupling constant, the Fermi temperature and unconventional superconductivity in the carbonaceous sulfur hydride 190 K superconductor
论文作者
论文摘要
最近，Snider等人（2020 Nature 586 373）报道了高压压缩的碳硫硫Hydride中超导性的观察，$ h_x $$（s，c）_y $。高度压缩的$ LA $ la $$ H_ {10} $，Somayazulu等人（2019Phys。Rev.Lett。122027001）报告的$ H_X $$（S，C）_y $ $ 5 $ by 5 k超过了TC = 280 K的先前记录。在本文中，我们分析了Snider等人报道的实验温度依赖性磁化数据R（t，b）。分析表明，$ h_x $$（s，c）_y $化合物表现出TC = 190 K（p = 210 GPA）具有电子耦合常数$λ$λ$λ$λ$λ$ _ {e-ph} $ = 2.0，关键温度的比率，tc，tf，tf，tf，tf，formi tf，tf，0.01111111111 <0.01 <0.01 <0.01 <tfc <0.01 <0.01 <tfc <tfc <0.00。这些推论值非常接近$ H_x $$ S $在p = 155-165 GPA的$ H_X $$ S $（2015 Nature 525 73）的p = 155-165 GPA。这意味着，在所有被考虑的情况下，碳硫硫氢化氢190 K超导体均属于Uemura图中的非常规的超导体带，所有其他高度压缩的超级氢/氘代表都位于其中。应当指出的是，我们的分析表明，所有原始R（t，b）数据集用于$ h_x $$（s，c）_y $样本，Snider等人（2020 Nature 586 373）报告的TC> 200 K无法将其表征为可靠的数据源。因此，需要独立的实验确认/反驳高-TC值。
Recently, Snider et al (2020 Nature 586 373) reported on the observation of superconductivity in highly-compressed carbonaceous sulfur hydride, $H_x$$(S,C)_y$. The highest critical temperature in $H_x$$(S,C)_y$ by 5 K exceeds previous record of Tc = 280 K reported by Somayazulu et al (2019 Phys. Rev. Lett. 122 027001) for highly-compressed $La$$H_{10}$. In this paper we analyze experimental temperature dependent magnetoresistance data, R(T,B), reported by Snider et al. The analysis shows that $H_x$$(S,C)_y$ compound exhibited Tc = 190 K (P = 210 GPa) has the electron-phonon coupling constant $λ$$_{e-ph}$ = 2.0 and the ratio of critical temperature, Tc, to the Fermi temperature, Tf, in the range of 0.011 < Tc/Tf < 0.018. These deduced values are very close to ones reported for $H_x$$S$ at P = 155-165 GPa by Drozdov et al (2015 Nature 525 73). This means that in all considered scenarios the carbonaceous sulfur hydride 190 K superconductor falls into unconventional superconductors band in the Uemura plot, where all other highly-compressed super-hydride/deuterides are located. It should be noted that that our analysis shows that all raw R(T,B) datasets for $H_x$$(S,C)_y$ samples for which Snider et al (2020 Nature 586 373) reported Tc > 200 K cannot be characterized as reliable data sources. Thus, independent experimental confirmation/disprove high-Tc values in the carbonaceous sulfur hydride is required.
