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Special Quantum Matter Seminar

Monday, September 18, 2023
12:00pm to 1:00pm
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East Bridge 114
Strange Metal in a Superconductor to Metal Transition and Linear Magnetoresistance
Jaewon Kim, Department of Physics, UC Berkeley,

Most known examples of quantum superconductor to metal transitions (QSMT) and standard theoretical considerations give at the critical point a constant sheet resistance of order resistance quantum . However, recent experiments with cuprates have revealed QSMTs with linear in temperature resistivity at the critical point. We propose an effective theory of a disordered superconductor that captures this behavior. Our theory also predicts a linear magnetoresistance (LMR) with a universal relaxation rate , albeit within narrower field ranges than seen in experiments In the second part of my talk, I will discuss a different mechanism for LMR involving scattering of quasi-particles on proximate spatial ordering pinned by disorder.

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