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首页> 外文期刊>Bulletin of the American Physical Society >APS -APS March Meeting 2017 - Event - Quantum phase transition of frustrated triangle lattice Ising model coupled to a fermi surface
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APS -APS March Meeting 2017 - Event - Quantum phase transition of frustrated triangle lattice Ising model coupled to a fermi surface

机译：APS -APS 2017年3月会议-事件-沮丧的三角形晶格Ising模型耦合到费米表面的量子相变

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摘要

Employing a newly developed quantum Monte Carlo algorithm, weinvestigate the frustrated transverse field triangle lattice Isingmodel coupled to a fermi surface. Without the coupling between Fermionand Ising fields, the bosonic system goes through a quantum phasetransition from clock ordered phase to paramagnetic phase, where thequantum critical point (QCP) is associated with an emergent U(1) symmetry. With the coupling, the bosonic fluctuations introduced effective interaction among the fermions and have distorted the bare Fermi surface of the triangle lattice tight-binding model towards an interacting fermi surface with hot spots and fermi pockets. As the transverse field is gradually tuned towards to U(1) critical point, the gapped hot spots develop evidence of non-fermi-liquid behavoir, renders the original QCP in the frustrated triangle lattice Ising model even more non-trivial. The detailed properties of this QCP and its relevence towards recent developments of metallic QCP is also discussed.
机译：利用新开发的量子蒙特卡罗算法，我们研究了耦合到费米表面的受挫横向场三角晶格Isingmodel。没有费米子场和伊辛场之间的耦合，玻色子系统就经历了从时钟有序相到顺磁相的量子相变，其中量子临界点（QCP）与出现的U（1）对称性相关。通过耦合，玻色子涨落在费米子之间引入了有效的相互作用，并使三角形晶格紧密结合模型的裸费米表面向具有热点和费米囊的相互作用费米表面变形。随着横向场逐渐向U（1）临界点调谐，带隙的热点形成了非费米液体行为的证据，使受挫的三角形晶格Ising模型中的原始QCP变得更加平凡。还讨论了此QCP的详细特性及其与金属QCP的最新发展的相关性。

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