Applying BCS-BEC crossover theory to high-temperature superconductors and ultracold atomic Fermi gases

被引:35
作者
Chen, Q.
Levin, K.
Stajic, J.
机构
[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA
[2] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
关键词
D O I
10.1063/1.2199443
中图分类号
O59 [应用物理学];
学科分类号
摘要
This review is written at the time of the twentieth anniversary of the discovery of high-temperature superconductors, which nearly coincides with the important discovery of the super-fluid phases of ultracold trapped fermionic atoms. We show how these two subjects have much in common. Both have been addressed from the perspective of the BCS-Bose-Einstein condensation (BEC) crossover scenario, which is designed to treat short coherence length superfluids with transition temperatures which are '' high '' with respect to the Fermi energy. A generalized mean field treatment of BCS-BEC crossover at general temperatures T-,T- based on the BCS-Leggett ground state, has met with remarkable success in the fermionic atomic systems. Here we summarize this success in the context of four different cold atom experiments, all of which provide indications, direct or indirect, for the existence of a pseudogap. This scenario also provides a physical picture of the pseudogap phase in the underdoped cuprates which is a central focus of high T-c research. We summarize successful applications of BCS-BEC crossover to key experiments in high T-c systems, including the phase diagram, specific heat, and vortex core STM data, along with the Nernst effect, and exciting recent data on the superfluid density in very underdoped samples. (c) 2006 American Institute of Physics.
引用
收藏
页码:406 / 423
页数:18
相关论文
共 118 条
[71]   Phase fluctuations and pseudogap phenomena [J].
Loktev, VM ;
Quick, RM ;
Sharapov, SG .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2001, 349 (01) :1-123
[72]   Specific heat evidence on the normal state pseudogap [J].
Loram, JW ;
Mirza, KA ;
Cooper, JR ;
Talloon, JL .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1998, 59 (10-12) :2091-2094
[73]   ELECTRONIC SPECIFIC-HEAT OF YBA2CU3O6+X FROM 1.8 TO 300-K [J].
LORAM, JW ;
MIRZA, KA ;
COOPER, JR ;
LIANG, WY ;
WADE, JM .
JOURNAL OF SUPERCONDUCTIVITY, 1994, 7 (01) :243-249
[74]   Numerical studies of the s-wave pseudogap state and related Tc:: the ''pairing approximation'' theory [J].
Maly, J ;
Jankó, B ;
Levin, K .
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1999, 321 (1-2) :113-133
[75]   EXPERIMENTAL PROOF OF A TIME-REVERSAL-INVARIANT ORDER-PARAMETER WITH A PI-SHIFT IN YBA2CU3O7-DELTA [J].
MATHAI, A ;
GIM, Y ;
BLACK, RC ;
AMAR, A ;
WELLSTOOD, FC .
PHYSICAL REVIEW LETTERS, 1995, 74 (22) :4523-4526
[76]  
Micnas R., 1998, Condensed Matter Physics, V1, P89
[77]   SUPERCONDUCTIVITY IN NARROW-BAND SYSTEMS WITH LOCAL NONRETARDED ATTRACTIVE INTERACTIONS [J].
MICNAS, R ;
RANNINGER, J ;
ROBASZKIEWICZ, S .
REVIEWS OF MODERN PHYSICS, 1990, 62 (01) :113-171
[78]   Resonance theory of the crossover from Bardeen-Cooper-Schrieffer superfluidity to Bose-Einstein condensation in a dilute Fermi gas [J].
Milstein, JN ;
Kokkelmans, SJJMF ;
Holland, MJ .
PHYSICAL REVIEW A, 2002, 66 (04) :6
[79]   Spin fluctuations in YBa2Cu3O6.6 [J].
Mook, HA ;
Dai, PC ;
Hayden, SM ;
Aeppli, G ;
Perring, TG ;
Dogan, F .
NATURE, 1998, 395 (6702) :580-582
[80]   BOSE CONDENSATION IN AN ATTRACTIVE FERMION GAS - FROM WEAK TO STRONG COUPLING SUPERCONDUCTIVITY [J].
NOZIERES, P ;
SCHMITTRINK, S .
JOURNAL OF LOW TEMPERATURE PHYSICS, 1985, 59 (3-4) :195-211