Two-channel Kondo physics from tunneling impurities with triangular symmetry
نویسندگان
چکیده
منابع مشابه
Two-channel Kondo physics in two-impurity Kondo models.
We consider the non-Fermi-liquid quantum critical state of the spin-S two-impurity Kondo model and its potential realization in a quantum dot device. Using conformal field theory and the numerical renormalization group, we show the critical point to be identical to that of the two-channel Kondo model with additional potential scattering, for any spin S. Distinct conductance signatures are shown...
متن کاملPairbreaking in S-wave Superconductors by Two-channel Kondo Impurities
We propose dynamical defects with a rotational degree of freedom in a metal as a possible realization of two-channel Kondo systems. When thè = 0 state of the defect is blocked, the impurity exhibits a Kramers doublet ground state. We consider the pair breaking eeect of a nite density of this type of two-channel Kondo impurities in an s-wave super-conductor, using an auxiliary particle represent...
متن کاملThe physics of Kondo impurities in graphene.
This article summarizes our understanding of the Kondo effect in graphene, primarily from a theoretical perspective. We shall describe different ways to create magnetic moments in graphene, either by adatom deposition or via defects. For dilute moments, the theoretical description is in terms of effective Anderson or Kondo impurity models coupled to graphene's Dirac electrons. We shall discuss ...
متن کاملKondo temperature for the two-channel Kondo models of tunneling centers.
A two-channel Kondo (2CK) non-Fermi liquid state in a metal resulting from the interaction between electrons and structural defects modeled by double-well potentials (DWP) is revisited. Account only of the two lowest states in DWP is known to lead to rather low Kondo temperature, T(K). We prove that the contribution of higher excited states reduces T(K), if all of the intermediate states are ta...
متن کاملTheory of scanning tunneling spectroscopy: from Kondo impurities to heavy fermion materials.
Kondo systems ranging from the single Kondo impurity to heavy fermion materials present us with a plethora of unconventional properties whose theoretical understanding is still one of the major open problems in condensed matter physics. Over the last few years, groundbreaking scanning tunneling spectroscopy (STS) experiments have provided unprecedented new insight into the electronic structure ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 1997
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.55.6832