Magnetic excitations and transport properties in frustrated ferromagnetic chain
Magnetic excitations and transport properties in frustrated ferromagnetic chain
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DOI：
10.1016/j.jmmm.2019.02.006
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发表时间：
2019-02
影响因子：
2.7
通讯作者：
H. Onishi
中科院分区：
文献类型：
--
作者：
H. Onishi
为了阐明自旋π态中束缚磁振子的输运性质，采用数值对角化方法研究了磁场中自旋为1/2的J1-J2海森堡链的自旋Drude重量，其中J1为铁磁，J2为反铁磁.在零磁场下，数值计算结果与多达24个网站表明，自旋德鲁德重量将是零的热力学极限，表明扩散自旋输运。随着磁场的增加，自旋Drude重量在低温下增加，表明束缚磁振子将有助于自旋输运。
To clarify the transport property mediated by bound magnons in a spin nematic state, we investigate the spin Drude weight of a spin-1/2 J 1-J 2 Heisenberg chain with ferromagnetic J 1 and antiferromagnetic J 2 in a magnetic field by numerical diagonalization. At zero magnetic field, numerical results with up to 24 sites suggest that the spin Drude weight would be zero in the thermodynamic limit, indicating diffusive spin transport. With increasing the magnetic field, the spin Drude weight is enhanced at low temperatures, indicating that bound magnons would contribute to the spin transport.