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arXiv 1107.0069cond-mat.supr-con
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347GPa压力下金属氢分子超导态的性质

Properties of the superconducting state in molecular metallic hydrogen under pressure at 347 GPa

R. Szczęśniak, M. W. Jarosik

摘要:

测量了在347GPa压力作用下金属氢分子诱导超导态的热力学性质。特别地,已经表明,对于$μ^{*}\in<0.08,0.15>$,临界温度($T_{C}$)在120 K至90 K的范围内变化,其中$μ^{*}$是库仑赝势的值。接着,计算零开尔文温度附近的能隙($2Δ(0)$)。已经指出,无量纲比$2Δ(0)/k_{B}T_{C}$随着$μ^{*}$从3.98增加到3.84而略微减小。在最后一步中,确定有效电子质量($m^{*}_{e}$)与裸电子质量($m_{e}$)的比率。已经证明,对于$T=T_{C}$,$m^{*}_{e}/m_{e}$取其最高值等于1.96。

英文摘要:

The thermodynamic properties of the superconducting state induced in metallic molecular hydrogen under the influence of pressure 347 GPa were determined. In particular, it has been shown that the critical temperature ($T_{C}$) changes in the range from 120 K to 90 K for $μ^{*}\in<0.08,0.15>$, where $μ^{*}$ is the value of the Coulomb pseudopotential. Next, the energy gap near the temperature of zero Kelvin ($2Δ(0)$) was calculated. It has been stated, that the dimensionless ratio $2Δ(0)/k_{B}T_{C}$ slightly decreases with the increase of $μ^{*}$ from 3.98 to 3.84. In the last step, the ratio of effective electron mass ($m^{*}_{e}$) to the bare electron mass ($m_{e}$)) was determined. It has been proved that $m^{*}_{e}/m_{e}$ takes its highest value equal to 1.96 for $T=T_{C}$.

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