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Title: Fluctuation induced precriticality in heavy fermions

Abstract

The nesting of the Fermi surfaces of an electron pocket and a hole pocket separated by a wave vector Q interacting via a repulsive potential gives rise to itinerant antiferromagnetism. The order can gradually be suppressed by mismatching the nesting and a quantum critical point is obtained as T{sub N}{yields}0. The renormalization group flow leads to a strong coupling fixed point. We study the linear response to spin- and charge-density waves, to singlet and triplet superconducting fluctuations, the low-T specific heat, and the magnetic susceptibility. All quantities increase on a logarithmic scale when the temperature is lowered. The results are discussed in the context of non-Fermi-liquid behavior observed in some heavy fermion compounds. (c) 2000 American Institute of Physics.

Authors:
 [1]
  1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
Publication Date:
OSTI Identifier:
20216226
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FERMI LEVEL; SILICON ALLOYS; PALLADIUM ALLOYS; CERIUM ALLOYS; RENORMALIZATION; SPIN WAVES; CHARGE DENSITY; MAGNETIC SUSCEPTIBILITY; SUPERCONDUCTIVITY; ANTIFERROMAGNETISM; THEORETICAL DATA

Citation Formats

Schlottmann, P. Fluctuation induced precriticality in heavy fermions. United States: N. p., 2000. Web. doi:10.1063/1.373275.
Schlottmann, P. Fluctuation induced precriticality in heavy fermions. United States. doi:10.1063/1.373275.
Schlottmann, P. Mon . "Fluctuation induced precriticality in heavy fermions". United States. doi:10.1063/1.373275.
@article{osti_20216226,
title = {Fluctuation induced precriticality in heavy fermions},
author = {Schlottmann, P.},
abstractNote = {The nesting of the Fermi surfaces of an electron pocket and a hole pocket separated by a wave vector Q interacting via a repulsive potential gives rise to itinerant antiferromagnetism. The order can gradually be suppressed by mismatching the nesting and a quantum critical point is obtained as T{sub N}{yields}0. The renormalization group flow leads to a strong coupling fixed point. We study the linear response to spin- and charge-density waves, to singlet and triplet superconducting fluctuations, the low-T specific heat, and the magnetic susceptibility. All quantities increase on a logarithmic scale when the temperature is lowered. The results are discussed in the context of non-Fermi-liquid behavior observed in some heavy fermion compounds. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.373275},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 87,
place = {United States},
year = {2000},
month = {5}
}