Thermodynamics of the superconducting phase in compressed GeH 4 (H 2)2
作者： R. Szcze¸śniak , D. Szcze¸śniak , A.P. Durajski
DOI: 10.1016/J.SSC.2013.12.036
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摘要: Abstract Recent studies on the hydrogen-rich metals are mainly stimulated by fact that these superconductors supposed to exhibit high value of critical temperature (TC). The thermodynamic properties GeH 4 ( H 2 ) hydride under pressure at 250 GPa have been studied in present paper. calculations conducted framework Eliashberg approach for wide range Coulomb pseudopotential values: μ ⋆ ∈ 〈 0.1 , 0.3 〉 . It has found is entire pseudopotential: T C 128.5 69.8 K values dimensionless ratios, namely R Δ ≡ 0 / k B N and differ from predictions Bardeen–Cooper–Schrieffer theory. In particular, 4.30 4.08 1.91 1.58 0.151 0.154 Finally, ratio electron effective mass m e band (me) reaches maximum temperature, where = 2.45
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sci-hub.se 参考文章(68)
R. Szcze¸śniak, A.P. Durajski, On the critical temperature and the energy gap in dense SiH4(H2)2 at 250 GPa Solid State Communications. ,vol. 153, pp. 26- 30 ,(2013) , 10.1016/J.SSC.2012.10.015
J. G. Bednorz, K. A. M�ller, Possible high Tc superconductivity in the Ba-La-Cu-O system European Physical Journal B. ,vol. 64, pp. 189- 193 ,(1986) , 10.1007/BF01303701
L. Gao, Y. Y. Xue, F. Chen, Q. Xiong, R. L. Meng, D. Ramirez, C. W. Chu, J. H. Eggert, H. K. Mao, Superconductivity up to 164 K in HgBa2Cam-1CumO2m+2+ delta (m=1, 2, and 3) under quasihydrostatic pressures. Physical Review B. ,vol. 50, pp. 4260- 4263 ,(1994) , 10.1103/PHYSREVB.50.4260
Olga Degtyareva, John E. Proctor, Christophe L. Guillaume, Eugene Gregoryanz, Michael Hanfland, Formation of transition metal hydrides at high pressures Solid State Communications. ,vol. 149, pp. 1583- 1586 ,(2009) , 10.1016/J.SSC.2009.07.022
R. Szczȩśniak, D. Szczȩśniak, Thermodynamic investigations of high-pressure superconducting state in CaLi2 at 45 GPa Solid State Communications. ,vol. 152, pp. 779- 783 ,(2012) , 10.1016/J.SSC.2012.01.045
Patryk Zaleski-Ejgierd, Roald Hoffmann, N. W. Ashcroft, High pressure stabilization and emergent forms of PbH4. Physical Review Letters. ,vol. 107, pp. 037002- 037002 ,(2011) , 10.1103/PHYSREVLETT.107.037002
Guoying Gao, Artem R. Oganov, Aitor Bergara, Miguel Martinez-Canales, Tian Cui, Toshiaki Iitaka, Yanming Ma, Guangtian Zou, Superconducting high pressure phase of germane Physical Review Letters. ,vol. 101, pp. 107002- 107002 ,(2008) , 10.1103/PHYSREVLETT.101.107002
Chris J. Pickard, R. J. Needs, High-pressure phases of silane. Physical Review Letters. ,vol. 97, pp. 045504- ,(2006) , 10.1103/PHYSREVLETT.97.045504
A.P. Durajski, Study of thermodynamic properties of SiH4(H2)2 superconductor under high pressure Physica C-superconductivity and Its Applications. ,vol. 485, pp. 145- 148 ,(2013) , 10.1016/J.PHYSC.2012.12.002
Timothy A. Strobel, Xiao-Jia Chen, Maddury Somayazulu, Russell J. Hemley, Vibrational dynamics, intermolecular interactions, and compound formation in GeH4-H2 under pressure. Journal of Chemical Physics. ,vol. 133, pp. 164512- ,(2010) , 10.1063/1.3505299