arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1208.4099cond-mat.str-elcond-mat.mtrl-sci
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压力、热和场作用下的烧绿石电子:虹彩石发光

Pyrochlore electrons under pressure, heat and field: shedding light on the iridates

William Witczak-Krempa, Ara Go, Yong Baek Kim

摘要:

本文以烧绿石铱酸盐为模型,研究了电子在焦绿石晶格上的有限温度和磁场相图。我们提供了最一般的hacky允许的哈密顿量,包括下一个最近的邻居跳跃,并将其与一个斯莱特-科斯特为基础的哈密顿的虹膜。它捕获Lifshitz和/或几个阶段之间的热转变,如金属,半金属,拓扑绝缘体和Weyl半金属,和缺口反铁磁体与不同的订单。我们的结果的电荷电导率,直流和光学,霍尔系数,磁化强度和磁化率显示出良好的协议与最近的实验,并提供新的预测。因此,我们的有效模型揭示了烧绿石铱酸盐在一个统一的方式。

英文摘要:

We study the finite temperature and magnetic field phase diagram of electrons on the pyrochlore lattice subject to a local repulsion as a model for the pyrochlore iridates. We provide the most general symmetry-allowed Hamiltonian, including next-nearest neighbour hopping, and relate it to a Slater-Koster based Hamiltonian for the iridates. It captures Lifshitz and/or thermal transitions between several phases such as metals, semimetals, topological insulators and Weyl semimetals, and gapped antiferromagnets with different orders. Our results on the charge conductivity, both DC and optical, Hall coefficient, magnetization and susceptibility show good agreement with recent experiments and provide new predictions. As such, our effective model sheds light on the pyrochlore iridates in a unified way.

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。

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