Structural Order Parameter in the Pyrochlore Superconductor Cd<sub>2</sub>Re<sub>2</sub>O<sub>7</sub>
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- Sergienko Ivan A.
- Department of Physics and Physical Oceanography, Memorial University of Newfoundland
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- Curnoe Stephanie H.
- Department of Physics and Physical Oceanography, Memorial University of Newfoundland
書誌事項
- タイトル別名
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- Structural Order Parameter in the Pyrochlore Superconductor Cd2Re2O7
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It is shown that both structural phase transitions in Cd2Re2O7, which occur at Ts1=200 K and Ts2=120 K, are due to an instability of the Re tetrahedral network with respect to the same doubly degenerate long-wavelength phonon mode. The primary structural order parameter transforms according to the irreducible representation Eu of the point group Oh. We argue that the transition at Ts1 may be of the second order, in accordance with experimental data. We obtain the phase diagram in the space of phenomenological parameters and propose a thermodynamic path that Cd2Re2O7 follows upon cooling. Couplings of the itinerant electronic system and localized spin states in pyrochlores and spinels to atomic displacements are discussed.
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 72 (7), 1607-1610, 2003
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
- 1390282679164533632
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- NII論文ID
- 110001954584
- 210000104293
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- NII書誌ID
- AA00704814
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- BIBCODE
- 2003JPSJ...72.1607S
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 6606703
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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
