Quantum phase transition from an antiferromagnet to a spin liquid in a metal
Name
Grover-2010-Quantum phase transi.pdf
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Author(s)
Grover, Tarun
Todadri, Senthil
Date Issued
May 2010
Journal
Physical Review B
Publisher
American Physical Society
Citation
Grover, Tarun, and T. Senthil. “Quantum phase transition from an antiferromagnet to a spin liquid in a metal.” Physical Review B 81.20 (2010): 205102. © 2010 The American Physical Society
Version
Final published version
Abstract
We study quantum phase transitions from easy-plane antiferromagnetic metals to paramagnetic metals in Kondo-Heisenberg lattice systems. If the paramagnetic metal is a fractionalized Fermi liquid then the universal critical properties of the phase transition are unaffected for a weak Kondo coupling even when the Fermi surface intersects the magnetic zone boundary. This is in striking contrast to the conventional theory of phase transitions between paramagnetic and antiferromagnetic metals where any Kondo coupling is strongly relevant, and leads to a Landau-damped “Hertz-Millis” theory. The electron quasiparticle remains well defined in the quantum critical regime and the critical spin fluctuations only contribute subleading corrections to the various properties of conduction electrons.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.81.205102
