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On quantum Griffiths effects in metallic systems

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arxiv cond-mat/0208396 v2 pith:45BXTC3X submitted 2002-08-21 cond-mat.str-el cond-mat.stat-mech

A. J. Millis , D. Morr , J. Schmalian This is my paper · ORCID
classification cond-mat.str-elcond-mat.stat-mech
keywords quantumgriffithsbehavioreffectsmetallicsystemstheoriesanalyse
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Elementary analytical extremal statistics arguments are used to analyse the possibility of quantum Griffiths effects in nearly critical systems with overdamped dynamics, such as arise in conventional theories of metallic quantum criticality. The overdamping is found to strongly suppress quantum tunnelling of rare regions, leading to superparamagnetic rather than quantum griffiths behavior. Implications for theories of non-fermi-liquid behavior in heavy fermion materials are discussed.

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  1. Fractionalized Fermi liquids and the cuprate phase diagram

    cond-mat.str-el 2025-08 unverdicted novelty 3.0 of 10

    Reviews the FL* theory for cuprates using ancilla layer models and SU(2) gauge theories to explain pseudogap hole pockets of area p/8, Fermi arcs, and transitions to d-wave superconductivity and Fermi liquid behavior.

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