Diagonal Composite Order in a Two-Channel Kondo Lattice

Shintaro Hoshino, Junya Otsuki, and Yoshio Kuramoto
Phys. Rev. Lett. 107, 247202 – Published 7 December 2011

Abstract

A novel type of symmetry breaking is reported for the two-channel Kondo lattice where conduction electrons have spin and orbital (channel) degrees of freedom. Using the continuous-time quantum Monte Carlo and the dynamical mean-field theory, a spontaneous breaking of the orbital symmetry is observed. The tiny breakdown of orbital occupation number, however, vanishes if the conduction electrons have the particle-hole symmetry. The proper order parameter instead is identified as a composite quantity representing the orbital-selective Kondo effect. The single-particle spectrum of the selected orbital shows insulating property, while the other orbital behaves as a Fermi liquid. This composite order is the first example of odd-frequency order other than off-diagonal order (superconductivity), and is a candidate of hidden order in f-electron systems.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 24 August 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.247202

© 2011 American Physical Society

Authors & Affiliations

Shintaro Hoshino, Junya Otsuki, and Yoshio Kuramoto

  • Department of Physics, Tohoku University, Sendai 980-8578, Japan

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 107, Iss. 24 — 9 December 2011

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×