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Collective charge excitations below the metal-to-insulator transition in BaVS3 (CROSBI ID 147085)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Ivek, Tomislav ; Vuletić, Tomislav ; Tomić, Silvia ; Akrap, Ana ; Berger, H ; Forro, Laszlo Collective charge excitations below the metal-to-insulator transition in BaVS3 // Physical review. B, Condensed matter and materials physics, 78 (2008), 3; 035110-1-035110-5

Podaci o odgovornosti

Ivek, Tomislav ; Vuletić, Tomislav ; Tomić, Silvia ; Akrap, Ana ; Berger, H ; Forro, Laszlo

engleski

Collective charge excitations below the metal-to-insulator transition in BaVS3

The charge response in the barium vanadium sulfide (\bavs{; ; ; ; }; ; ; ; ) single crystals is characterized by dc resistivity and low frequency dielectric spectroscopy. A broad relaxation mode in MHz range with huge dielectric constant $\approx 10^6$ emerges at the metal-to-insulator phase transition $T_{; ; ; ; \mathrm{; ; ; ; MI}; ; ; ; }; ; ; ; \approx 67$~K, weakens with lowering temperature and eventually levels off below the magnetic transition $T_\chi \approx 30$~K. The mean relaxation time is thermally activated in a manner similar to the dc resistivity. These features are interpreted as signatures of the collective charge excitations characteristic for the orbital ordering that gradually develops below

charge density wave; orbital ordering; dielectric spectroscopy

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Podaci o izdanju

78 (3)

2008.

035110-1-035110-5

objavljeno

1098-0121

Povezanost rada

Fizika

Indeksiranost