Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

A Raman study of the charge-density-wave state in A0.₃MoO₃ (A = K, Rb)

Title data

Sagar, Dodderi M. ; Fausti, D. ; Yue, S. ; Kuntscher, Christine A. ; van Smaalen, Sander ; van Loosdrecht, Paul H. M.:
A Raman study of the charge-density-wave state in A0.₃MoO₃ (A = K, Rb).
In: New Journal of Physics. Vol. 10 (26 February 2008) Issue 2 . - 023043.
ISSN 1367-2630
DOI: https://doi.org/10.1088/1367-2630/10/2/023043

Official URL: Volltext

Abstract in another language

We report a comparative Raman spectroscopic study of the quasi-one-dimensional charge-density-wave (CDW) systems A 0.₃MoO₃ (A = K, Rb). Temperature- and polarization-dependent experiments reveal charge-coupled vibrational Raman features. The strongly temperature-dependent collective amplitudon modes in the two materials differ by about 3 cm −1 , thus revealing the role of the alkali atom. We discuss the observed vibrational features in terms of the CDW ground state accompanied by a change in the crystal symmetry. A frequency-kink in some modes seen in K0.₃MoO₃ between T = 80 and 100 K supports the first-order lock-in transition, unlike the case of Rb0.₃MoO₃. The unusually sharp Raman lines (limited by the instrumental response) at very low temperatures and their temperature evolution suggests that the decay of the low-energy phonons is strongly influenced by the presence of the temperature-dependent CDW gap.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography > Chair Crystallography - Univ.-Prof. Dr. Sander van Smaalen
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 24 Nov 2015 09:10
Last Modified: 21 Apr 2016 12:49
URI: https://eref.uni-bayreuth.de/id/eprint/22947