Resolution of Entropy $\ln \sqrt{2}$ by Ordering in Two-Channel Kondo Lattice

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 $\ln \sqrt{2}$ 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.

9 pages, 11 figures

References in corpus (5)

• Continuous-time Monte Carlo methods for quantum impurity models
• Imaging the Fano Lattice to 'Hidden Order' Transition in URu2Si2
• Rotational Symmetry Breaking in the Hidden-Order Phase of URu2Si2
• Universal low-temperature crossover in two-channel Kondo models
• Electronic Order with Staggered Kondo and Crystalline Electric Field Singlets

Cited by in corpus (11)

• Quadrupole-Driven Non-Fermi Liquid and Magnetic-Field Induced Heavy Fermion States in a Non-Kramers Doublet System
• Mean-field description of odd-frequency superconductivity with staggered ordering vector
• Large-N Approach to the Two-Channel Kondo Lattice
• Competition between Quadrupole and Magnetic Kondo Effects in Non-Kramers Doublet Systems
• Composite Orders and Lifshitz Transition of Heavy Electrons
• Collective excitations from composite orders in Kondo lattice with non-Kramers doublets
• Unconventional orbital ordering and emergent dimensional reduction in fulleride superconductors
• Mass-Imbalanced Superconductivity in Effective Two-Channel Kondo Lattice
• Algebraic Hastatic Order in One-Dimensional Two-Channel Kondo Lattice
• Higher-Dimensional Chirally Stabilized Fixed Points and Their Deformations
• Unified Theory of Hastatic order and Antiferromagnetism in URu${}_2$Si${}_2$