Modified Perturbation Theory Applied to Kondo-Type Transport through a Quantum Dot under a Magnetic Field.
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- Takagi Osamu
- Department of Physics, Saitama University, Urawa, Saitama 338–8570
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- Saso Tetsuro
- Department of Physics, Saitama University, Urawa, Saitama 338–8570
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Abstract
Linear conductance through a quantum dot is calculated under a finite magnetic field using the modified perturbation theory. The method is based on the second-order perturbation theory with respect to the Coulomb repulsion, but the self-energy is modified to reproduce the correct atomic limit and to fulfill the Friedel sum rule exactly. Although this method is applicable only to zero temperature in a strict sense, it is approximately extended to finite temperatures. It is found that the conductance near electron-hole symmetry is suppressed by the application of the magnetic field at low temperatures. Positive magnetoconductance is observed in the case of large electron-hole asymmetry.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 68 (9), 2894-2897, 1999
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204182426112
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- NII Article ID
- 210000101831
- 110001978771
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- NII Book ID
- AA00704814
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- BIBCODE
- 1999JPSJ...68.2894T
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 4904990
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed