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Quenching of overcompensated Kondo impurities via channel asymmetry

Title
Quenching of overcompensated Kondo impurities via channel asymmetry
Authors
Schlottmann P.Lee K.-J.-B.
Ewha Authors
이공주복
SCOPUS Author ID
이공주복scopus
Issue Date
1996
Journal Title
Physica B: Condensed Matter
ISSN
0921-4526JCR Link
Citation
vol. 223-224, no. 1-4, pp. 458 - 463
Indexed
SCI; SCIE; SCOPUS scopus
Abstract
We consider a spin-1/2 impurity interacting with conduction electrons in two different orbital channels via an isotropic spin exchange. The exchange is the same for both channels, but a crystalline field breaks the symmetry between the orbital channels. This corresponds to a splitting of the conduction electron Γ8 into two doublets in the quadrupolar Kondo effect and to the application of an external magnetic field in the electron assisted tunneling of an atom in a double-well potential. We study the ground-state properties of the impurity as a function of the magnetic and crystalline fields. The crystalline field quenches the critical behavior of the overcompensated fixed point: The impurity ground state is a singlet.
DOI
10.1016/0921-4526(96)00148-2
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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