Phase Diagram of Orbital-Selective Mott Transitions at Finite Temperatures
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- Inaba Kensuke
- Department of Applied Physics, Osaka University
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- Koga Akihisa
- Department of Applied Physics, Osaka University
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- Suga Sei-ichiro
- Department of Applied Physics, Osaka University
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- Kawakami Norio
- Department of Applied Physics, Osaka University
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Mott transitions in the two-orbital Hubbard model with different bandwidths are investigated at finite temperatures. By means of the self-energy functional approach, we discuss the stability of the intermediate phase that has one orbital localized and the other itinerant; this phase is caused by the orbital-selective Mott transition (OSMT). It is shown that the OSMT realizes two different coexistence regions at finite temperatures in accordance with the recent results of Liebsch. We further find that a particularly interesting behavior emerges around the special conditions U=U′ and J=0, which includes a new type of coexistence region that has three distinct states. By systematically changing the Hund coupling, we establish the global phase diagram to elucidate the key role played by the Hund coupling on the Mott transitions.
収録刊行物
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- Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ
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Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ 74 (9), 2393-2396, 2005
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282679164960768
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- NII論文ID
- 110002245715
- 210000105615
- 130004539427
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- NII書誌ID
- AA00704814
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- BIBCODE
- 2005JPSJ...74.2393I
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 7438542
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
