期刊
PHYSICAL REVIEW B
卷 100, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.100.045140
关键词
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资金
- U.S. Department of Energy [DE-SC0019030]
- Gordon and Betty Moore Foundation EPiQS Initiative [GBMF-4306]
- National Science Foundation [PHY-1607611]
We compute the transport and chaos properties of lattices of quantum Sachdev-Ye-Kitaev islands coupled by single fermion hopping, and with the islands coupled to a large number of local, low energy phonons. We find two distinct regimes of linear-in-temperature (T) resistivity, and describe the crossover between them. When the electron-phonon coupling is weak, we obtain the incoherent metal regime, where there is near-maximal chaos with front propagation at a butterfly velocity v(B), and the associated diffusivity D-chaos = v(B)(2)/(2 pi T) closely tracks the energy diffusivity. On the other hand, when the electron-phonon coupling is strong, and the linear resistivity is largely due to near-elastic scattering of electrons off nearly free phonons, we find that the chaos is far from maximal and spreads diffusively. We also describe the crossovers to low T regimes where the electronic quasiparticles are well defined.
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