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UID:UW-Physics-Event-2964
DTSTART:20130225T223000Z
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DTSTAMP:20260420T020307Z
LAST-MODIFIED:20130225T162039Z
LOCATION:5310 Chamberlin
SUMMARY:Orthogonal Metals - the simplest non-Fermi liquids\, R. G. Her
 b Condensed Matter Seminar\, Rahul Nandkishore\, Princeton University
DESCRIPTION:I present a fractionalized metallic phase which is indisti
 nguishable from the Fermi liquid in conductivity and thermodynamics\, 
 but is sharply distinct in one electron properties\, such as the elect
 ron spectral function.  This phase is dubbed the `Orthogonal Metal.' T
 he Orthogonal Metal and the transition to it from the Fermi liquid are
  naturally described using a slave particle representation wherein the
  electron is expressed as a product of a fermion and a slave Ising spi
 n. I emphasize that when the slave spins are disordered the result is 
 not a Mott insulator (as erroneously assumed in the prior literature) 
 but rather the Orthogonal Metal. I present prototypical ground state w
 avefunctions for the Orthogonal Metal by modifying the Jastrow factor 
 of Slater-Jastrow wave- functions that describe ordinary Fermi liquids
 . I further demonstrate that the transition from the Fermi liquid to t
 he Orthogonal Metal can\, in some circumstances\, provide a simple exa
 mple of a continuous destruction of a Fermi surface with a critical Fe
 rmi surface appearing right at the critical point. I present exactly s
 oluble models that realize an Orthogonal Metal phase\, and the phase t
 ransition to the Fermi liquid. These models thus provide valuable solv
 able examples for phase transitions associated with the death of a Fer
 mi surface.  <br>
\n<br>
\n<br>
\nReference: R. Nandkishore\, M. Metli
 tski and T. Senthil\, Phys. Rev. B 86\, 045128 (2012) <br>
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URL:https://www.physics.wisc.edu/events/?id=2964
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