QUASI-PARTICLE GAP IN A 2-DIMENSIONAL KOSTERLITZ-THOULESS SUPERCONDUCTOR

被引：32

作者：

MOREO, A

SCALAPINO, DJ

WHITE, SR

机构：

[1] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106

[2] UNIV CALIF IRVINE,DEPT PHYS,IRVINE,CA 92717

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.45.7544

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The negative-U Hubbard model, doped away from half filling, is believed to undergo a Kosterlitz-Thouless transition into a superconducting state with power-law pair-field correlations. We have used numerical simulation techniques to calculate the temperature dependence of the spin susceptibility and the single-particle density of states. These quantities show that a gap in the single-particle spectrum develops for a two-dimensional layer in the Kosterlitz-Thouless state.

引用

页码：7544 / 7546

页数：3

共 9 条

[1] BULUT N, UNPUB
[2] DENSITY OF STATES OF DOPED HUBBARD CLUSTERS
DAGOTTO, E
MOREO, A
ORTOLANI, F
RIERA, J
SCALAPINO, DJ
[J]. PHYSICAL REVIEW LETTERS, 1991, 67 (14) : 1918 - 1921
[3] DAGOTTO E, IN PRESS PHYS REV B
[4] ORDERING, METASTABILITY AND PHASE-TRANSITIONS IN 2 DIMENSIONAL SYSTEMS
Kosterlitz, JM
Thouless, DJ
[J]. JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1973, 6 (07): : 1181 - 1203
[5] 2-DIMENSIONAL NEGATIVE-U HUBBARD-MODEL
MOREO, A
SCALAPINO, DJ
[J]. PHYSICAL REVIEW LETTERS, 1991, 66 (07) : 946 - 948
[6] PHASE-DIAGRAM OF THE TWO-DIMENSIONAL NEGATIVE-U HUBBARD-MODEL
SCALETTAR, RT
LOH, EY
GUBERNATIS, JE
MOREO, A
WHITE, SR
SCALAPINO, DJ
SUGAR, RL
DAGOTTO, E
[J]. PHYSICAL REVIEW LETTERS, 1989, 62 (12) : 1407 - 1410
[7] SPECTRAL DENSITIES OF THE SYMMETRICAL ANDERSON MODEL
SILVER, RN
GUBERNATIS, JE
SIVIA, DS
JARRELL, M
[J]. PHYSICAL REVIEW LETTERS, 1990, 65 (04) : 496 - 499
[8] SUGAR RL, 1989, PHYS REV B, V40, P506
[9] SPECTRAL WEIGHT FUNCTION FOR THE 2-DIMENSIONAL HUBBARD-MODEL
WHITE, SR
[J]. PHYSICAL REVIEW B, 1991, 44 (09): : 4670 - 4673

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