University of Minnesota
School of Physics & Astronomy

Condensed Matter Seminar

Tuesday, November 20th 2018
4:00 pm:
Speaker: Xiaoyu Wang, University of Chicago
Subject: Electrical transport near an Ising-nematic quantum critical point
Note change of time and day, this week only.

An electronic nematic order spontaneously breaks the rotation symmetry of the many body system, making various physical properties anisotropic. It has been observed in various systems, in particular the cuprate and iron-based high temperature superconductors. In the vicinity of a nematic quantum critical point — achieved by tuning some external parameter such as pressure or doping — the physics is described by that of low-frequency long-wavelength order parameter fluctuations coupled to a Fermi surface. However, due to the momentum-conserving nature of the induced electron-electron interaction, the temperature dependence of the resistivity near an Ising nematic QCP remains unclear. In this talk, we shed light on the problem by incorporating disorder and Umklapp process into the low-energy theory. Our work can be viewed as solving an extended Boltzmann equation, with a collision integral that accounts for complicated multi-particle scattering processes important near the QCP

Faculty Host: Rafael Fernandes

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