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 2003.03322cond-mat.str-elcond-mat.mes-hall
收藏

自旋链中的竞争长程相互作用和自旋矢量手征

Competing long-range interactions and spin vector chirality in spin-chains

E. Vernek, O. Ávalos-Ovando, S. E. Ulloa

摘要:

近年来,一维磁链中的竞争有序的研究引起了人们的极大关注,因为长程海森堡相互作用的存在被发现允许有趣的量子相变。在这里,我们调查的自旋轨道效应的作用,考虑自旋1/2链的存在下,共线和非共线的长程相互作用。通过精确对角化和密度矩阵重整化群计算,我们研究了该体系的富相图。随着非共线耦合强度的增加,系统的矢量自旋手征序参量发生跳跃,从共线到横向磁关联序的跃迁也随之发生.这表明,调谐长程相互作用允许控制系统中相当大的矢量自旋手性的开始,这可能被用来沿着链传递信息。我们调查的特征结构的不同阶段,并探讨其可能的物理实现在不同的材料系统。

英文摘要:

Studies of competing orders in 1D magnetic chains have attracted considerable attention in recent years, as the presence of long-range Heisenberg interactions is found to allow interesting quantum phase transitions. We investigate here the role of spin-orbit effects by considering spin-1/2 chains in the presence of both collinear and non-collinear long-range interactions. By employing exact diagonalization and density matrix renormalization group calculations we investigate the rich phase diagram of this system. We find transitions from collinear to transverse magnetic correlated order as the strength of the non-collinear coupling increases, accompanied by a jump in the vector spin chirality order parameter of the system. This shows that tuning long-range interactions allows control of the onset of sizable vector spin chirality in a system, which may be used to transmit information down the chain. We investigate the characteristic structure of the distinct phases and explore their possible physical implementation in different materials systems.

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。

↑