Special Quantum Matter Seminar

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.