U(1) symmetry breaking in one-dimensional Mott insulators studied by the density matrix renormalization group method

被引：3

作者：

Maruyama, Isao ^{[1
]}

Koide, Tetsuji ^{[1
]}

Hatsugai, Yasuhiro ^{[1
,2
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[2] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.76.235105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new type of external field violating the particle number preservation is studied in one-dimensional strongly correlated systems by the density matrix renormalization group method. Due to the U(1) symmetry breaking, the ground state has fluctuation of the total particle number, which implies injection of electrons and holes from out of the chain. This charge fluctuation can be relevant even at half filling because the particle-hole symmetry is preserved under the finite effective field. In addition, we discuss a quantum phase transition obtained by considering the symmetry-breaking field as a mean field of interchain hopping.

引用

页数：6

共 23 条

[1] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1987, 235 (4793) :1196-1198

[2] Deconfinement transition and Luttinger to Fermi liquid crossover in quasi-one-dimensional systems [J].

Biermann, S ;

Georges, A ;

Lichtenstein, A ;

Giamarchi, T .

PHYSICAL REVIEW LETTERS, 2001, 87 (27) :276405-1

[3] The density matrix renormalization group for finite Fermi systems [J].

Dukelsky, J ;

Pittel, S .

REPORTS ON PROGRESS IN PHYSICS, 2004, 67 (04) :513-552

[4] Density matrix renormalization group study of ultrasmall superconducting grains [J].

Dukelsky, J ;

Sierra, G .

PHYSICAL REVIEW LETTERS, 1999, 83 (01) :172-175

[5] Theory of Gossamer and resonating valence bond superconductivity [J].

Gan, JY ;

Zhang, FC ;

Su, ZB .

PHYSICAL REVIEW B, 2005, 71 (01)

[6] Gossamer superconductivity near antiferromagnetic mott insulator in layered organic conductors [J].

Gan, JY ;

Chen, Y ;

Su, ZB ;

Zhang, FC .

PHYSICAL REVIEW LETTERS, 2005, 94 (06)

[7] Dynamical mean-field theory of strongly correlated fermion systems and the limit of infinite dimensions [J].

Georges, A ;

Kotliar, G ;

Krauth, W ;

Rozenberg, MJ .

REVIEWS OF MODERN PHYSICS, 1996, 68 (01) :13-125

[8]

GIAMARCHI T, 2004, QUANTUM PHYS ONE DIM

[9] DYNAMICS OF A PARTICLE IN AN EXTERNAL POTENTIAL INTERACTING WITH A DISSIPATIVE ENVIRONMENT [J].

GUINEA, F .

PHYSICAL REVIEW B, 1985, 32 (11) :7518-7523

[10]

HATSUGAI Y, 2006, J PHYS SOC JPN, V75

← 1 2 3 →