Continuous-Time Quantum Monte Carlo Approach to Singlet–Triplet Kondo Systems
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- Hoshino Shintaro
- Department of Physics, Tohoku University
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- Otsuki Junya
- Department of Physics, Tohoku University
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- Kuramoto Yoshio
- Department of Physics, Tohoku University
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Abstract
Dynamical properties are studied numerically for a variant of the Kondo model with singlet and triplet crystalline electric field (CEF) levels where Kondo and CEF singlets compete for the ground state. Using the continuous-time quantum Monte Carlo method, we derive the t-matrix of conduction electrons and dynamical susceptibilities of local electrons without encountering the negative sign problem. When the CEF splitting is comparable to the Kondo temperature, the dynamical response has only a quasi-elastic peak. Nevertheless, the local single-particle spectrum shows an energy gap in strong contrast with the ordinary Kondo model.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 78 (7), 074719-074719, 2009
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204196821888
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- NII Article ID
- 130005437530
- 10025962909
- 210000107897
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- NII Book ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 10280872
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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