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 0907.2536cond-mat.str-el
收藏

自旋冰的量子熔化:涌现合作四极和手征

Quantum Melting of Spin Ice: Emergent Cooperative Quadrupole and Chirality

Shigeki Onoda, Yoichi Tanaka

摘要:

提出了辉石晶格磁体Pr $_2TM_2$ O $_7$($TM=$ Ir,Zr,Sn)自旋冰的量子熔化.在原子非Kramers磁偶极子的基础上,导出了具有非平凡磁各向异性的量子超交换哈密顿量。基态表现出合作的铁四极和赝自旋手性,形成近晶相液晶的磁性模拟。我们的理论解释了在Pr $_2TM_2$ O $_7$中实验观察到的动态自旋冰行为。

英文摘要:

A quantum melting of the spin ice is proposed for pyrochlore-lattice magnets Pr$_2TM_2$O$_7$ ($TM=$Ir, Zr, and Sn). The quantum superexchange Hamiltonian having a nontrivial magnetic anisotropy is derived in the basis of atomic non-Kramers magnetic doublets. The ground states exhibit a cooperative ferroquadrupole and pseudospin chirality, forming a magnetic analog of smectic liquid crystals. Our theory accounts for dynamic spin-ice behaviors experimentally observed in Pr$_2TM_2$O$_7$.

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。

↑