Theory of tunneling centers in metallic systems

Role of excited states and orbital Kondo effect

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48 Citations (Scopus)

Abstract

The interaction between a tunneling atom in a double potential well and the conduction electrons of different angular momenta results in an anisotropic two-channel orbital Kondo problem, but the Kondo temperature TK found earlier has always been somewhat small. That difficulty can be resolved by including some of the excited states of the atom in the well. The TK calculated is around 1-10 K in agreement with experiments. The same result can be obtained even if the direct electron assisted tunneling is ignored.

Original languageEnglish
Pages (from-to)542-545
Number of pages4
JournalPhysical Review Letters
Volume72
Issue number4
DOIs
Publication statusPublished - 1994

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Kondo effect
orbitals
conduction electrons
excitation
atoms
angular momentum
electrons
interactions
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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title = "Theory of tunneling centers in metallic systems: Role of excited states and orbital Kondo effect",
abstract = "The interaction between a tunneling atom in a double potential well and the conduction electrons of different angular momenta results in an anisotropic two-channel orbital Kondo problem, but the Kondo temperature TK found earlier has always been somewhat small. That difficulty can be resolved by including some of the excited states of the atom in the well. The TK calculated is around 1-10 K in agreement with experiments. The same result can be obtained even if the direct electron assisted tunneling is ignored.",
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AB - The interaction between a tunneling atom in a double potential well and the conduction electrons of different angular momenta results in an anisotropic two-channel orbital Kondo problem, but the Kondo temperature TK found earlier has always been somewhat small. That difficulty can be resolved by including some of the excited states of the atom in the well. The TK calculated is around 1-10 K in agreement with experiments. The same result can be obtained even if the direct electron assisted tunneling is ignored.

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