Berlin 2018 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 83: Superconductivity: (General) Theory

TT 83.2: Talk

Thursday, March 15, 2018, 09:45–10:00, HFT-FT 101

Quantum Theory of Linear Magnetoresistance and Linear-in-Temperature Resistance — •Vincent Sacksteder — Royal Holloway University of London, UK

The physical mechanisms responsible for Linear Magnetoresistance (seen in many settings) and Linear-in-Temperature resistance (seen in cuprates and pnictides) are not yet fully understood. We propose that these phenomena are manifestations of quantum interference processes, similar to the logarithmic conductivity corrections known to be caused by weak antilocalization. We submit that the linear-in-temperature resistance is caused not by increased scattering but instead by scatterings interfering coherently to control the resistance. Strong correlations may be responsible for providing the coherence required by the quantum interference processes. We propose a numerically precise approach to analyzing and interpreting magnetotransport data which allows firm conclusions to be made about the length scales and quantum interference processes contributing to transport.