arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1107.1040cond-mat.str-el
收藏

耦合声子的受驱动关联系统的量子动力学

Quantum Dynamics of a Driven Correlated System Coupled to Phonons

Lev Vidmar, Janez Bonca, Takami Tohyama, Sadamichi Maekawa

摘要:

在t-J-Holstein模型下研究了正方晶格上单个载流子掺杂时电荷、自旋和晶格自由度之间的非平衡相互作用。在均匀电场存在下,我们计算了准定态。随着电子-声子耦合的增加,载流子迁移率降低,但是,我们发现在负微分电阻区,由于电子-声子耦合,稳态电流增加。我们探讨了自旋和声子子系统之间的吸收能量的分布。对于与铜酸盐相关的模型参数,大部分获得的能量流入自旋子系统。

英文摘要:

Nonequilibrium interplay between charge, spin and lattice degrees of freedom on a square lattice is studied for a single charge carrier doped in the t-J-Holstein model. In the presence of an uniform electric field we calculate the qusistationary state. With increasing electron-phonon (e-ph) coupling the carrier mobility decreases, however, we find increased steady state current due to e-ph coupling in the regime of negative differential resistance. We explore the distribution of absorbed energy between the spin and the phonon subsystem. For model parameters as relevant for cuprates, the majority of the gained energy flows into the spin subsystem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑