CROSSOVER FROM BCS TO BOSE SUPERCONDUCTIVITY - A FUNCTIONAL INTEGRAL APPROACH

被引：2
|
作者：
RANDERIA, M [1 ]
DEMELO, CARS [1 ]
ENGELBRECHT, JR [1 ]
机构：
[1] UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801
来源：
PHYSICA B | 1994年 / 194卷
关键词：
D O I：
10.1016/0921-4526(94)91204-1
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We use a functional integral formulation to study the crossover from cooperative Cooper pairing to the formation and condensation of tightly bound pairs in a 3D continuum model of fermions with attractive interactions. The inadequacy of a saddle point approximation with increasing coupling is pointed out, and the importance of temporal (quantum) fluctuations for normal state properties at intermediate and strong coupling is emphasized. In addition to recovering the Nozieres-Schmitt-Rink interpolation scheme for T(c), and the Leggett variational results for T = 0, we also present results for evolution of the time-dependent Ginzburg-Landau equation and collective mode spectrum as a function of the coupling.
引用
收藏
页码：1409 / 1410
页数：2
相关论文
共 50 条
  • [21] Crossover from BCS to Bose-Einstein in Hubbard model
    Pedersen, MH
    Schneider, T
    Beck, H
    ACTA PHYSICA POLONICA A, 1997, 91 (02) : 419 - 422
  • [22] CROSSOVER FROM BCS TO BOSE SUPERCONDUCTIVITY - TRANSITION-TEMPERATURE AND TIME-DEPENDENT GINZBURG-LANDAU THEORY
    DEMELO, CARS
    RANDERIA, M
    ENGELBRECHT, JR
    PHYSICAL REVIEW LETTERS, 1993, 71 (19) : 3202 - 3205
  • [23] Pseudogap phase formation in the crossover from Bose-Einstein condensation to BCS superconductivity in low-dimensional systems
    Gusynin, VP
    Loktev, VM
    Quick, RM
    Sharapov, SG
    INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 1998, 12 (29-31): : 3035 - 3038
  • [24] BEC, BCS, and BCS-bose crossover theories in superconductors and superfluids
    de Llano, M.
    Sevilla, F. J.
    Solis, M. A.
    Valenciaa, J. J.
    CONDENSED MATTER THEORIES, VOL 20, 2006, 20 : 435 - +
  • [25] REVISITING THE NOZIERES AND SCHMITT-RINK APPROACH FOR THE EVOLUTION FROM THE BCS SUPERCONDUCTIVITY TO BOSE-CONDENSATION
    PISTOLESI, F
    STRINATI, GC
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1994, 235 : 2359 - 2360
  • [26] Nonlinear integral equation from the BCS gap equations of superconductivity
    Nee, Janpou
    NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS, 2010, 11 (01) : 190 - 197
  • [27] CROSSOVER FROM BCS TO LOCAL PAIR SUPERCONDUCTIVITY IN 2-DIMENSION
    TOKUMITU, A
    MIYAKE, K
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1994, 235 : 2367 - 2368
  • [28] Functional renormalization group approach to the BCS-BEC crossover
    Diehl, Sebastian
    Floerchinger, Stefan
    Gies, Holger
    Pawlowski, Jan Martin
    Wetterich, Christof
    ANNALEN DER PHYSIK, 2010, 522 (09) : 615 - 656
  • [29] BCS and Bose-Einstein condensates in superconductivity and superfluidity
    Grether, M
    Fortes, M
    Sevilla, FJ
    Solís, MA
    de Llano, M
    Salazar, A
    Valladares, AA
    Rojo, O
    CONDENSED MATTER THEORIES, VOL 16, 2001, 16 : 305 - 313
  • [30] BCS to Bose crossover: Broken-symmetry state
    Engelbrecht, J. R.
    Randeria, M.
    Sa De Melo, C. A. R.
    Physical Review B: Condensed Matter, 55 (22):
12345