Resolution of entropy ln ∞2 by ordering in two-channel kondo lattice

Shintaro Hoshino, Junya Otsuki, Yoshio Kuramoto

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Peculiar property of electronic order is clarified for the two-channel Kondo lattice. With two conduction electrons per site, the order parameter is a composite quantity involving both local and itinerant degrees of freedom. In contrast to the ordinary Kondo lattice, a heavy electron band is absent above the transition temperature, but is rapidly formed below it. The change of entropy associated with the ordering is found to be close to ln ∞2 per site. This entropy corresponds to the residual entropy in a two-channel Kondo impurity, which has been regarded as due to localized free Majorana particles. The present composite order is interpreted as instability of Majorana particles toward non-Kramers conduction electrons plus heavy fermions that involve localized electrons.

Original languageEnglish
Article number044707
JournalJournal of the Physical Society of Japan
Volume82
Issue number4
DOIs
Publication statusPublished - Apr 1 2013
Externally publishedYes

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entropy
conduction electrons
composite materials
electrons
degrees of freedom
fermions
transition temperature
impurities
electronics

Keywords

  • Composite order
  • Continuoustime quantum Monte Carlo
  • Dynamical mean-field theory
  • Majorana fermion
  • Two-channel Kondo lattice

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Resolution of entropy ln ∞2 by ordering in two-channel kondo lattice. / Hoshino, Shintaro; Otsuki, Junya; Kuramoto, Yoshio.

In: Journal of the Physical Society of Japan, Vol. 82, No. 4, 044707, 01.04.2013.

Research output: Contribution to journalArticle

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