Anomalous low-frequency conductivity in easy-plane XXZ spin chains
Anomalous low-frequency conductivity in easy-plane XXZ spin chains
复制标题
易平面 XXZ 自旋链中的异常低频电导率
DOI:
10.1103/physrevb.101.224415
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发表时间:
2020
影响因子:
3.7
通讯作者:
Ware, Brayden
中科院分区:
文献类型:
--
作者:
Agrawal, Utkarsh;Gopalakrishnan, Sarang;Vasseur, Romain;Ware, Brayden
Using the framework of generalized hydrodynamics, we compute the low-frequency spin conductivityof XXZ spin chains with easy-plane anisotropy. We find that for almost all values of the anisotropy, the low-frequency conductivity scales anomalously with frequency, as. We interpret this anomalous response as a consequence of quasiparticles undergoing Lévy flights. For special values of the anisotropy, the divergence is cut off at low frequencies, sohas a finite dc limit. These results reveal a hitherto unknown mechanism for anomalous response in integrable systems and also provide a physical explanation of the discontinuous behavior of the spin Drude weight. We use our approach to recover that at the isotropic point,. We support our results with extensive numerical studies using matrix-product operator methods.
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DOI:
10.1017/cbo9780511524332.002
发表时间:
1999-03
期刊:
--
影响因子:
--
作者:
Minoru Takahashi
通讯作者:
Minoru Takahashi
影响因子:
8.6
作者:
R. Steinigeweg;W. Brenig
通讯作者:
W. Brenig
影响因子:
8.6
作者:
Bonnes, Lars;Essler, Fabian H. L.;Lauchli, Andreas M.
通讯作者:
Lauchli, Andreas M.
影响因子:
8.6
作者:
Ljubotina, Marko;Zadnik, Lenart;Prosen, Tomaz
通讯作者:
Prosen, Tomaz
影响因子:
3.7
作者:
Gopalakrishnan, Sarang;Huse, David A.;Vasseur, Romain
通讯作者:
Vasseur, Romain