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Two-channel Kondo physics in odd impurity chains

Abstract:

We study odd-membered chains of spin-12 impurities, with each end connected to its own metallic lead. For antiferromagnetic exchange coupling, universal two-channel Kondo (2CK) physics is shown to arise at low energies. Two overscreening mechanisms are found to occur depending on coupling strength, with distinct signatures in physical properties. For strong interimpurity coupling, a residual chain spin-12 moment experiences a renormalized effective coupling to the leads, while in the weak-cou...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.84.035119

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Institution:
University of Oxford
Department:
Oxford, MPLS, Chemistry, Physical and Theoretical Chem
Role:
Author
Journal:
PHYSICAL REVIEW B
Volume:
84
Issue:
3
Publication date:
2011-07-25
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
URN:
uuid:cee975fa-8aa8-4dcf-b236-69ce52a2234a
Source identifiers:
170219
Local pid:
pubs:170219
Language:
English

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