FFLO Superconductivity near the Antiferromagnetic Quantum Critical Point
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- Yanase Youichi
- Department of Physics, University of Tokyo
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説明
The Fulde–Ferrel–Larkin–Ovchinnikov (FFLO) state near the antiferromagnetic quantum critical point (AFQCP) is investigated by analyzing the two dimensional Hubbard model on the basis of the fluctuation exchange (FLEX) approximation. The phase diagram against the magnetic field and temperature is compared with that obtained in the BCS theory. We discuss the influences of the antiferromagnetic spin fluctuation through the quasiparticle scattering, retardation effect, parity mixing and internal magnetic field. It is shown that the FFLO state is stable in the vicinity of AFQCP even though the quasiparticle scattering due to the spin fluctuation is destructive to the FFLO state. The large positive slope dHFFLO⁄dT and the convex curvature (d2HFFLO⁄dT2>0) are obtained, where HFFLO is the critical magnetic field for the second order phase transition from the uniform BCS state to the FFLO state. These results are consistent with the experimental results in CeCoIn5. The possible magnetic transition in the FFLO state is examined.
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 77 (6), 063705-063705, 2008
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
- 1390282679174600704
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- NII論文ID
- 130005436440
- 110006781568
- 210000107257
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- NII書誌ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 9534015
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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サーチ
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- 抄録ライセンスフラグ
- 使用不可
