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Electrical properties of Cd2Re2O7 under pressure (CROSBI ID 126788)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Barišić, Neven ; Forro, Laszlo ; Mandruš, D. ; Jin, R. ; He, J. ; Fazekas, P. Electrical properties of Cd2Re2O7 under pressure // Physical review. B, Condensed matter and materials physics, 67 (2003), 24; 245112-1-245112-8. doi: 10.1103/PhysRevB.67.245112

Podaci o odgovornosti

Barišić, Neven ; Forro, Laszlo ; Mandruš, D. ; Jin, R. ; He, J. ; Fazekas, P.

engleski

Electrical properties of Cd2Re2O7 under pressure

We examine the resistivity and thermopower of single crystal specimens of the pyrochlore oxide Cd2Re2O7 at pressures up to 2 GPa. Thermopower proves to be a sensitive tool in the study of the phase diagram of Cd2Re2O 7. The 200 K metal-to-metal phase transition is accompanied by a strong increase of the absolute value of the thermopower. A weaker anomaly allows us to identify a second phase transition at 125 K. Following the temperature dependence of this anomaly, we obtain the corresponding phase boundary up to 1.2 GPa, and argue that it must drop to T=0 before p reaches 1.8 GPa. There is a wide temperature range where the electrical properties are fairly sensitive to pressure, indicating the strong coupling of the electronic degrees of freedom to the lattice.

electrical properties ; resistivity ; thermopower ; high pressure effects ; phase diagram ; metal-to-metal phase transition ; temperature dependence ; strong coupling ; 1.2 to 2 GPa ; 200 K ; 125 K ; Cd2Re2O7.

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Podaci o izdanju

67 (24)

2003.

245112-1-245112-8

objavljeno

1098-0121

10.1103/PhysRevB.67.245112

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Fizika

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