SUPERFLUID-INSULATOR TRANSITION IN DISORDERED BOSON SYSTEMS

被引：270

作者：

KRAUTH, W

TRIVEDI, N

CEPERLEY, D

机构：

[1] SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794

[2] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.67.2307

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present results of path-integral Monte Carlo simulations of bosons on a two-dimensional square lattice in a random potential of average strength V and with on-site repulsion U. We find that the superfluid density rho-s is enhanced by increasing V and U in certain regions of parameter space. By combining the results of rho-s with the behavior of the density-density correlation function on lattices of size up to 10 x 10, we study the superfluid-to-Mott-insulator transition and the transition from a superfluid to a disorder-localized ("Bose-glass") phase.

引用

页码：2307 / 2310

页数：4

共 24 条

[1] SCALING THEORY OF LOCALIZATION - ABSENCE OF QUANTUM DIFFUSION IN 2 DIMENSIONS [J].

ABRAHAMS, E ;

ANDERSON, PW ;

LICCIARDELLO, DC ;

RAMAKRISHNAN, TV .

PHYSICAL REVIEW LETTERS, 1979, 42 (10) :673-676

[2] QUANTUM CRITICAL PHENOMENA IN ONE-DIMENSIONAL BOSE SYSTEMS [J].

BATROUNI, GG ;

SCALETTAR, RT ;

ZIMANYI, GT .

PHYSICAL REVIEW LETTERS, 1990, 65 (14) :1765-1768

[3] CROSSOVER AND SCALING PHENOMENA IN A DISORDERED FERMI-LIQUID [J].

BELITZ, D ;

KIRKPATRICK, TR .

PHYSICAL REVIEW LETTERS, 1989, 63 (12) :1296-1299

[4]

CEPERLEY DM, IN PRESS

[5]

CEPERLEY DM, 1984, PHYS REV B, V30, P2555

[6] DISORDER AND THE SUPERFLUID TRANSITION IN LIQUID-HE-4 [J].

CHAN, MHW ;

BLUM, KI ;

MURPHY, SQ ;

WONG, GKS ;

REPPY, JD .

PHYSICAL REVIEW LETTERS, 1988, 61 (17) :1950-1953

[7]

FISHER MPA, 1989, PHYS REV B, V40, P546, DOI 10.1063/1.38820

[8] LOCALIZATION AND INTERACTION IN ONE-DIMENSIONAL QUANTUM FLUIDS [J].

GIAMARCHI, T ;

SCHULZ, HJ .

EUROPHYSICS LETTERS, 1987, 3 (12) :1287-1293

[9] ANDERSON LOCALIZATION AND INTERACTIONS IN ONE-DIMENSIONAL METALS [J].

GIAMARCHI, T ;

SCHULZ, HJ .

PHYSICAL REVIEW B, 1988, 37 (01) :325-340

[10] ONSET OF SUPERCONDUCTIVITY IN THE TWO-DIMENSIONAL LIMIT [J].

HAVILAND, DB ;

LIU, Y ;

GOLDMAN, AM .

PHYSICAL REVIEW LETTERS, 1989, 62 (18) :2180-2183

← 1 2 3 →