Quantum phases of frustrated two-leg spin-1/2 ladders with skewed rungs

被引：18

作者：

Giri, Geetanjali ^{[1
]}

Dey, Dayasindhu ^{[2
]}

Kumar, Manoranjan ^{[2
]}

Ramasesha, S. ^{[1
]}

Soos, Zoltan G. ^{[3
]}

机构：

[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

[2] SN Bose Natl Ctr Basic Sci, Block JD,Sect 3, Kolkata 700098, India

[3] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW B | 2017年 / 95卷 / 22期

关键词：

HEISENBERG SYSTEMS; STATES; MODEL;

D O I：

10.1103/PhysRevB.95.224408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quantum phases of two-leg spin-1/2 ladders with skewed rungs are obtained using exact diagonalization of systems with up to 26 spins and by density-matrix renormalization-group calculations to 500 spins. The ladders have isotropic antiferromagnetic (AF) exchange J(2) > 0 between first neighbors in the legs, variable isotropic AF exchange J(1) between some first neighbors in different legs, and an unpaired spin per odd-membered ring when J(1) >> J(2). Ladders with skewed rungs and variable J(1) have frustrated AF interactions leading to multiple quantum phases: AF at small J(1), either ferromagnetic or AF at large J(1), as well as bond-order-wave phases or reentrant AF (singlet) phases at intermediate J(1).

引用

页数：8

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