High-pressure infrared absorption in Cs2TCNQ3 crystals grown under magnetic field
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Pressure dependence of infrared absorption has been measured in Cs2TCNQ3 single crystals grown under magnetic field of 5 T (5 T crystals). The behavior of the C-CN as well as C-H stretching modes suggest that there occurs a phase transition which resembles to the one related to the insulator to metal transition in the crystals grown without magnetic field (0 T crystals). This transition, however, takes place at 4.1 GPa, slightly higher than the case of 0 T crystals. The charge transfer degree of the neutral and radical molecules are found to be ρ = 0.30-0.37 and 0.81-0.85, respectively, which are significantly different from that of 0 T crystals. These differences are suggested to arise from the changes in the relative positions of the TCNQ molecules, as indicated from the behavior of the EMV mode.
- Elsevier BVの論文
- 2005-02-10
Elsevier BV | 論文
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