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arXiv 1802.04293cond-mat.str-el
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有限能窗下“奇异金属”相的候选理论

A candidate Theory for the "Strange Metal" phase at Finite Energy Window

Xiaochuan Wu, Xiao Chen, Chao-Ming Jian, Yi-Zhuang You, Cenke Xu

摘要:

本文提出了一个强相互作用电子与势的晶格模型来解释铜氧化物高温超导体中奇异金属相的主要现象。我们的模型的动机是最近开发的“四面体”秩3张量模型,模仿更有名的Sachdev-Ye-Kitaev(SYK)模型的物理。我们的电子模型具有以下优点:(1)在正方形晶格上每个位置只需要一个轨道;(2)它不需要任何猝灭的随机相互作用;(3)它具有局域相互作用并尊重系统的所有对称性;(4)该模型的可解极限具有在有限温度窗口内随温度线性标度的纵向直流电阻率;(5)这个模型的可解极限在红外线中也有费米子配对不稳定性,这可能导致超导性或“赝能隙”相。线性$-T$纵向电阻率和对不稳定性源于SYK模型和四面体张量模型的一般标度特征。

英文摘要:

We propose a lattice model for strongly interacting electrons with the potential to explain the main phenomenology of the strange metal phase in the cuprate high temperature superconductors. Our model is motivated by the recently developed "tetrahedron" rank-3 tensor model that mimics much of the physics of the better-known Sachdev-Ye-Kitaev (SYK) model. Our electron model has the following advantageous properties: (1) it only needs one orbital per site on the square lattice; (2) it does not require any quenched random interaction; (3) it has local interactions and respects all the symmetries of the system; (4) the soluble limit of this model has a longitudinal DC resistivity that scales linearly with temperature within a finite temperature window; (5) again the soluble limit of this model has a fermion pairing instability in the infrared, which can lead to either superconductivity or a "pseudogap" phase. The linear$-T$ longitudinal resistivity and the pairing instability originate from the generic scaling feature of the SYK model and the tetrahedron tensor model.

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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