摘要Using the electron--phonon mechanism, we explain the spatial anti-correlation between the energy-gap and the energy of phonon mode for cuprate superconductor found in tunnelling spectrum by STM measurements of Bi2212, which is the direct effect of an important relationship (or constraint) I=const, where I is superconducting parameters. By relaxing above constraint, we study the correlation of energy gap and phonon energy when I has a distribution. We calculate a map of transition temperature in space constructing by phonon energy and the parameter of electron--phonon interaction, which is helpful for understanding of the relation.
Abstract：Using the electron--phonon mechanism, we explain the spatial anti-correlation between the energy-gap and the energy of phonon mode for cuprate superconductor found in tunnelling spectrum by STM measurements of Bi2212, which is the direct effect of an important relationship (or constraint) I=const, where I is superconducting parameters. By relaxing above constraint, we study the correlation of energy gap and phonon energy when I has a distribution. We calculate a map of transition temperature in space constructing by phonon energy and the parameter of electron--phonon interaction, which is helpful for understanding of the relation.
(Transition temperature variations, phase diagrams)
引用本文:
FAN Wei. Anti-Correlation between Energy-Gap and Phonon Energy for Cuprate Bi2212 Superconductor[J]. 中国物理快报, 2008, 25(6): 2217-2220.
FAN Wei. Anti-Correlation between Energy-Gap and Phonon Energy for Cuprate Bi2212 Superconductor. Chin. Phys. Lett., 2008, 25(6): 2217-2220.
[1] Fischer {\Oystein et al %, Kugler M, Maggio-Aprile Ivan,%Berthod C and Renner C2007 Rev. Mod. Phys. 79 353 [2] Pan S H et al %, O'Neal J P, Badzey R L, Chamon C, Ding H,%Engelbrecht J R, Wang Z, Eisaki H, Uchida S, Gupta A K,%Ng K W, Hudson E W, Lang K M and Davis J C2001 Nature 413 282 [3] Lee Jinho et al %, Fujita K, McElroy K, Slezak J A, Wang M, Aiura Y,%Bando H, Ishikado M, Masui T, Zhu J X, Balatsky A V, Eisaki H, Uchida S%and Davis J C2006 Nature 442 546 [4] Devereaux T P et al %, Cuk T, Shen Z X and Nagaosa N2004 Phys. Rev. Lett. 93 117004 [5] Allen P B and Dynes R C 1975 Phys. Rev. B 12 905 [6] McMillan W L 1968 Phys. Rev. 167 331 [7] Damascelli A, Hussain Z and Shen Z X 2003 Rev. Mod. Phys. 75 473 [8] Scalapino D J, Schrieffer J R and Wilkins J W 1966 Phys. Rev. 148 263 [9] Holcomb M J 1996 Phys. Rev. B 54 6648 [10] Morel P, Anderson P W 1962 Phys. Rev. 125 1263 [11] Sandvik A W, Scalapino D J and Bicker N E 2004 Phys.Rev. B 69 094523 [12] Kostur V N, Mitrovi\'c B 1994 Phys. Rev. B 50 12774 [13] Lin H, Sahrakorpi S, Markiewicz R S and Bansil A 2006 Phys.Rev. Lett. 96 097001
2008, Vol. 25 
