Quantum critical metals and their instabilities

Shamit Kachru, Stanford University
Event Date and Time: 
Thu, 2015-01-29 15:30 - 16:30
Hennings 201
Local Contact: 
Moshe Rozali
Intended Audience: 
The problem of understanding quantum critical metals -- theories of gapless scalars interacting with a Fermi surface -- is arguably at the heart of intriguing physics seen in many materials, including the heavy fermions and the cuprates. Nevertheless, it remains poorly understood. In this colloquium, I will describe in simple language a quantum field theory approach to this class of problems. Results include new intermediate scaling regimes with interesting properties (including a non-Fermi liquid with vanishing Fermi velocity), and enhanced pairing leading to high-scale superconducting (and other) instabilities of the Fermi surface.
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