Quenching of overcompensated Kondo impurities via channel asymmetry

P. Schlottmann; Kong Ju Bock Lee

doi:10.1016/0921-4526(96)00148-2

Quenching of overcompensated Kondo impurities via channel asymmetry

P. Schlottmann, Kong Ju Bock Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

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.

Original language	English
Pages (from-to)	458-463
Number of pages	6
Journal	Physica B: Condensed Matter
Volume	223-224
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4526(96)00148-2
State	Published - 2 Jun 1996

Bibliographical note

Funding Information:
We acknowledge the support of the US Department of Energy (grant DE-FG05-91ER45553), the Ministry of Education of the Republic of Korea (grant BSRI-94-2428) and the Center for Theoretical Physics of Seoul National University.

Access to Document

10.1016/0921-4526(96)00148-2

Cite this

@article{3c1d296a3fd047aab160413dd4c71e19,

title = "Quenching of overcompensated Kondo impurities via channel asymmetry",

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.",

author = "P. Schlottmann and Lee, {Kong Ju Bock}",

note = "Funding Information: We acknowledge the support of the US Department of Energy (grant DE-FG05-91ER45553), the Ministry of Education of the Republic of Korea (grant BSRI-94-2428) and the Center for Theoretical Physics of Seoul National University.",

year = "1996",

month = jun,

day = "2",

doi = "10.1016/0921-4526(96)00148-2",

language = "English",

volume = "223-224",

pages = "458--463",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Quenching of overcompensated Kondo impurities via channel asymmetry

AU - Schlottmann, P.

AU - Lee, Kong Ju Bock

N1 - Funding Information: We acknowledge the support of the US Department of Energy (grant DE-FG05-91ER45553), the Ministry of Education of the Republic of Korea (grant BSRI-94-2428) and the Center for Theoretical Physics of Seoul National University.

PY - 1996/6/2

Y1 - 1996/6/2

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0030564211&partnerID=8YFLogxK

U2 - 10.1016/0921-4526(96)00148-2

DO - 10.1016/0921-4526(96)00148-2

M3 - Article

AN - SCOPUS:0030564211

SN - 0921-4526

VL - 223-224

SP - 458

EP - 463

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-4

ER -

Quenching of overcompensated Kondo impurities via channel asymmetry

Abstract

Bibliographical note

Access to Document

Fingerprint

Cite this