Bad metallic transport in geometrically frustrated models
arXiv:2101.00014 · doi:10.1103/PhysRevB.103.195111
Abstract
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, . 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.
arXiv comment37 pages, 11 figures; (v2) Final published version
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