Bad metallic transport in geometrically frustrated models
Bad metallic transport in geometrically frustrated models
复制标题
几何受挫模型中的金属传输不良
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
D. Chowdhury
中科院分区：
文献类型：
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作者：
J. F. Mendez;D. Chowdhury
本文研究了三角格子上一类相互作用尺度远大于单粒子带宽的几何阻挫模型的输运性质。从可以精确求解的仅相互作用极限出发，分析了单粒子跳跃中的输运和热力学行为随填充和温度的变化。在一个广泛的中间温度范围内，我们发现了直流电阻率随温度线性缩放的证据，典型值远远超过了电阻的量子，h/e。在一个序列的相称的填充，坏的金属制度最终跨越到相互作用引起的绝缘相在低温的限制。我们讨论了我们的研究结果的相关性，在冷原子和云纹异质结为基础的平台的实验。
We study the transport properties for a family of geometrically frustrated models on the triangular lattice with an interaction scale far exceeding the single-particle bandwidth. Starting from the interaction-only limit, which can be solved exactly, we analyze the transport and thermodynamic behavior as a function of filling and temperature at the leading non-trivial order in the single-particle hopping. Over a broad range of intermediate temperatures, we find evidence of a dc resistivity scaling linearly with temperature and with typical values far exceeding the quantum of resistance, h/e. At a sequence of commensurate fillings, the bad-metallic regime eventually crosses over into interaction induced insulating phases in the limit of low temperatures. We discuss the relevance of our results to experiments in cold-atom and moiré heterostructure based platforms.