Signatures of polaronic excitations in quasi-one-dimensional LaTiO3.41

Article

关键词: OPTICAL CONDUCTIVITY SPECTRA;    ELECTRONIC-STRUCTURE;    TEMPERATURE-DEPENDENCE;    SINGLE-CRYSTAL;    TTF-TCNQ;    ABSORPTION;    BAND;    LA2-XSRXNIO4+DELTA;    ATTRACTION;    CONDUCTORS;   

DOI  :  10.1103/PhysRevB.67.035105

来源: SCIE

【 摘 要 】

The optical properties of quasi-one-dimensional metallic LaTiO3.41 are studied for the polarization along the a and b axes. With decreasing temperature modes appear along both directions suggestive for a phase transition. The broadness of these modes along the conducting axis might be due to the coupling of the phonons to low-energy electronic excitations across an energy gap. We observe a pronounced midinfrared band with a temperature dependence consistent with (interacting) polaron models. The polaronic picture is corroborated by the presence of strong electron-phonon coupling and the temperature dependence of the dc conductivity.

【 授权许可】

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