Non-Adiabatic Effects of Superconductor Silane under High Pressure
FAN Wei1, WANG Jiang-Long2,1, ZOU Liang-Jian1, ZENG Zhi1
1Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031 2Department of Physics, Hebei University, Baoding 071002
Non-Adiabatic Effects of Superconductor Silane under High Pressure
FAN Wei1, WANG Jiang-Long2,1, ZOU Liang-Jian1, ZENG Zhi1
1Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031 2Department of Physics, Hebei University, Baoding 071002
We present the investigations of non-adiabatic effects by including vertex corrections in the standard Eliashberg theory and show that high phonon frequency is unfavorable to superconductivity in the regime of strong vertex correction. This means that it is hard to find high-transition-temperature superconductors in the compounds with light elements if the non-adiabatic effects are strong. The interplay interaction between non-adiabatic effect and Coulomb interaction makes the transition temperature of silane superconductor not so high as predicted by the standard Eliashberg theory.
We present the investigations of non-adiabatic effects by including vertex corrections in the standard Eliashberg theory and show that high phonon frequency is unfavorable to superconductivity in the regime of strong vertex correction. This means that it is hard to find high-transition-temperature superconductors in the compounds with light elements if the non-adiabatic effects are strong. The interplay interaction between non-adiabatic effect and Coulomb interaction makes the transition temperature of silane superconductor not so high as predicted by the standard Eliashberg theory.
FAN Wei;WANG Jiang-Long;ZOU Liang-Jian;ZENG Zhi. Non-Adiabatic Effects of Superconductor Silane under High Pressure[J]. 中国物理快报, 2010, 27(8): 87402-087402.
FAN Wei, WANG Jiang-Long, ZOU Liang-Jian, ZENG Zhi. Non-Adiabatic Effects of Superconductor Silane under High Pressure. Chin. Phys. Lett., 2010, 27(8): 87402-087402.
[1] Eremets M I, Medvedev I A, Tse J S and Yao Y 2008 Science 319 1506 [2] Ashcroft N W 2004 Phys. Rev. Lett. 92 187002 [3] Ashcroft N W 1968 Phys. Rev. Lett. 21 1748 [4] Chen X J, Wang J L, Struzhkin V V, Mao H K, Hemley R J and Lin H Q 2008 Phys. Rev. Lett. 101 077002 and supplemental materials [5] Feng J, Grochala W, Jaroń T, Hoffmann R, Bergara A and Ashcroft N W 2006 Phys. Rev. Lett. 96 017006 [6] Pickard C J and Needs R J 2006 Phys. Rev. Lett. 97 045504 [7] Yao Y, Tse J S, Ma Y and Tanaka K 2007 Eur. Phys. Lett. 78 37003 [8]Éliashberg G M 1960 Sov. Phys. JETP 11 696 [9] Scalapino D J, Schrieffer J R and Wilkins J W 1966 Phys. Rev. 148 263 [10] Allen P B and Dynes R C 1975 Phys. Rev. B 12 905 [11] Kostur V N and Mitrović B 1994 Phys. Rev. B 50 12774 [12] Grimaldi C, Pietronero L and Strässler S 1995 Phys. Rev. B 52 10530 [13] Fan W 2009 Physica C 469 177 [14] Fan W 2008 Chin. Phys. Lett. 25 2217 [15] Savrasov S Y and Savrasov D Y 1996 Phys. Rev. B 54 16487 [16] Baroni S, de Gironcoli S, Dal Corso A and Giannozzi P 2001 Rev. Mod. Phys. 73 515 [17] Martinez-Canales M, Oganov A R, Ma Y M, Yan Y, Lyakhov A O and Bergara A 2009 Phys. Rev. Lett. 102 087005
2010, Vol. 27 
