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
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.
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页数:7
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