| Electronic Phase Diagram of Mixed-Valence Gold Chloride |
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| 作者姓名： | 刘晓峻 守友浩 小岛宪道 |
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| 作者单位： | [1]LaboratoryofModernAcousticsandInstituteofAcoustics,NanjingUniversity,Nanjing210093 [2]DepartmentofAppliedPhysics,NagoyaUniversity,Nagoya464-8601,Japan [3]DepartmentofPureandAppliedSciences,UniversityofTokyo,Tokyo153-8902,Japan |
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| 摘 要： | A comprehensive electronic phase diagram is derived for mixed-valence gold chloride Cs2Au2Cl6 by means of high-pressure Raman spectroscopy. At all the temperatures investigated (100K≤T≤300 K), applications of pressure induce a phase transition from the mlxed-valence (MV) state to a single-valence (SV) state. In the SV state, a broad Au-Cl stretching band appears at～400 cm^-1 below ～200K. We have interpreted the appearance of the band in terms of formation of the AuX2^--like local lattice distortion, or the bipolarons.
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| 关 键 词： | 电子位相图 氯化物 临界温度 超导体 拉曼光谱 单价态 混合价态 |
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