Effective action approach to the Leggett's mode in two-band superconductors

被引：85
|
作者：
Sharapov, SC [1 ]
Gusynin, VP
Beck, H
机构：
[1] Univ Neuchatel, Inst Phys, CH-2000 Neuchatel, Switzerland
[2] Bogolyubov Inst Theoret Phys, UA-03143 Kiev, Ukraine
来源：
EUROPEAN PHYSICAL JOURNAL B | 2002年 / 30卷 / 01期
关键词：
D O I：
10.1140/epjb/e2002-00356-9
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We investigate a collective excitation (Leggett's mode) corresponding to small fluctuations of the relative phase of two condensates in two-band superconductor using the effective "phase only" action. We consider the possibility of observing Leggett's mode in MgB2 superconductor and conclude that for the known at present values of the two-band model parameters for MgB2 Leggett's mode arises above the two-particle threshold.
引用
收藏
页码：45 / 51
页数：7
相关论文
共 50 条
  • [31] Interorbital pair scattering in two-band superconductors
    Ciechan, Anna
    Wysokinski, Karol Izydor
    PHYSICAL REVIEW B, 2009, 80 (22)
  • [32] Postquench gap dynamics of two-band superconductors
    Cui, Tianbai
    Schutt, Michael
    Orth, Peter P.
    Fernandes, Rafael M.
    PHYSICAL REVIEW B, 2019, 100 (14)
  • [33] Current-induced massless mode of the interband phase difference in two-band superconductors
    Tanaka, Y.
    Hase, I.
    Yanagisawa, T.
    Kato, G.
    Nishio, T.
    Arisawa, S.
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2015, 516 : 10 - 16
  • [34] Electronic specific heat of two-band layered superconductors: Analysis within the generalized two-band α model
    Maksimov, E. G.
    Karakozov, A. E.
    Gorshunov, B. P.
    Zhukova, E. S.
    Ponomarev, Ya. G.
    Dressel, M.
    PHYSICAL REVIEW B, 2011, 84 (17)
  • [35] On the k-dependence of the hybridization in two-band superconductors
    1600, (73):
  • [36] Phase solitons and subgap excitations in two-band superconductors
    Samokhin, K. V.
    PHYSICAL REVIEW B, 2012, 86 (06)
  • [37] Conditions for nonmonotonic vortex interaction in two-band superconductors
    Chaves, A.
    Komendova, L.
    Milosevic, M. V.
    Andrade, J. S., Jr.
    Farias, G. A.
    Peeters, F. M.
    PHYSICAL REVIEW B, 2011, 83 (21):
  • [38] Bose condensation of the localized pairs in two-band superconductors
    M. E. Palistrant
    Journal of Superconductivity, 1997, 10 : 19 - 22
  • [39] Penetration-depth anisotropy in two-band superconductors
    Kogan, VG
    Zhelezina, NV
    PHYSICAL REVIEW B, 2004, 69 (13) : 132506 - 1
  • [40] The upper critical field in two-band layered superconductors
    Liu Min-Xia
    Gan Zi-Zhao
    CHINESE PHYSICS, 2007, 16 (03): : 826 - 833
12345