Phase diagram of spin-1 chains with Dzyaloshinskii-Moriya interaction

被引：2

作者：

Tschirhart, Hugo ^{[1
]}

Ong, Ernest T. S. ^{[2
]}

Sengupta, Pinaki ^{[2
]}

Schmidt, Thomas L. ^{[1
]}

机构：

[1] Univ Luxembourg, Phys & Mat Sci Res Unit, L-1511 Luxembourg, Luxembourg

[2] Nanyang Technol Univ, Sch Phys & Math Sci, 21 Nanyang Link, Singapore 637371, Singapore

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 19期

关键词：

DIMENSIONAL HEISENBERG-ANTIFERROMAGNET; MONTE-CARLO; HALDANE-GAP; XXZ CHAINS; DYNAMICS;

D O I：

10.1103/PhysRevB.100.195111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate an antiferromagnetic spin-1 Heisenberg chain in the presence of Dyzaloshinskii-Moriya interactions (DMI) and an external magnetic field. We study the resulting spin chain using a combination of numerical and analytical techniques. Using DMRG simulations to determine the spectral gap and the entanglement spectrum, we map out the phase diagram as a function of magnetic field strength and DMI strength. We provide a qualitative interpretation for these numerical findings by mapping the spin-1 chain on a spin-1/2 ladder and using a bosonization approach.

引用

页数：7

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