Status  Confirmed 
Seminar Series  LPENSBQ 
Subjects  condmat 
Date  Thursday 6 October 2022 
Time  12:45 
Institute  LPENS 
Seminar Room  L367 
Speaker's Last Name  Murthy 
Speaker's First Name  Chaitanya 
Speaker's Email Address  
Speaker's Institution  Stanford 
Title  A stability bound on the Tlinear resistivity of conventional metals 
Abstract  Abstract: Perturbative considerations account for the properties of conventional metals, including the range of temperatures T where the transport scattering rate is 1/tau_tr = 2 \pi \lambda T, where \lambda is a dimensionless strength of the electronphonon coupling. The fact that measured values satisfy \lambda <~ 1 has been noted in the context of a possible "Planckian" bound on transport. However, since the electronphonon scattering is quasielastic in this regime, no such Planckian considerations can be relevant. I will argue, based on Monte Carlo results on the Holstein model, that a different sort of bound is at play: a "stability" bound on \lambda consistent with metallic transport. I will then speculate that a qualitatively similar bound on the strength of residual interactions, which is often stronger than Planckian, may apply to metals more generally. 
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