The pressure-dependent mid-infrared properties of the quasi-one-dimensional metal beta-Na0.33V2O5 were studied at room temperature. The monotonic changes of the spectra below 12 GPa suggest a pressure-induced dimensional crossover and the relevance of electron-phonon coupling, leading to the formation of polaronic quasiparticles. The changes in the spectra above 12 GPa may be due to a redistribution of charge with a possible relation to structural changes. A possible relation between the interchain coupling and superconductivity is pointed out. (c) 2006 Elsevier B.V. All rights reserved.
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Japan Atom Energy Agcy, Quantum Beam Sci Directorate, Sayo, Hyogo 6795148, JapanJapan Atom Energy Agcy, Quantum Beam Sci Directorate, Sayo, Hyogo 6795148, Japan
Ohwada, Kenji
Yamauchi, Touru
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Univ Tokyo, Mat Design & Characterizat Lab, Inst Solid State Phys, Kashiwa, Chiba 2778581, JapanJapan Atom Energy Agcy, Quantum Beam Sci Directorate, Sayo, Hyogo 6795148, Japan
Yamauchi, Touru
Fujii, Yasuhiko
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CROSS, Tokai, Ibaraki 3191106, JapanJapan Atom Energy Agcy, Quantum Beam Sci Directorate, Sayo, Hyogo 6795148, Japan
Fujii, Yasuhiko
Ueda, Yutaka
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Univ Tokyo, Mat Design & Characterizat Lab, Inst Solid State Phys, Kashiwa, Chiba 2778581, JapanJapan Atom Energy Agcy, Quantum Beam Sci Directorate, Sayo, Hyogo 6795148, Japan