A Raman study of the Charge-Density-Wave State in A$_{0.3}$MoO$_3$ (A = K,Rb)

Details A Raman study of the Charge-Density-Wave State in A$_{0.3}$MoO$_3$ (A = K,Rb) A Raman study of the Charge-Density-Wave State in A$_{0.3}$MoO$_3$ (A = K,Rb)

2007-12-22

arxiv.org/abs/0712.3880v1

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, 7 figures

Scientific paper

10.1088/1367-2630/10/2/023043

We report a comparative Raman spectroscopic study of the quasi-one-dimensional charge-density-wave systems \ab (A = K, Rb). The temperature and polarization dependent experiments reveal charge-coupled vibrational Raman features. The strongly temperature-dependent collective amplitudon mode in both materials differ by about 3 cm, thus revealing the role of alkali atom. We discus the observed vibrational features in terms of charge-density-wave ground state accompanied by change in the crystal symmetry. A frequency-kink in some modes seen in \bb between T = 80 K and 100 K supports the first-order lock-in transition, unlike \rb. 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 charge density wave gap.

Affiliated with

Also associated with

No associations

Rating

A Raman study of the Charge-Density-Wave State in A$_{0.3}$MoO$_3$ (A = K,Rb) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Raman study of the Charge-Density-Wave State in A$_{0.3}$MoO$_3$ (A = K,Rb), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Raman study of the Charge-Density-Wave State in A$_{0.3}$MoO$_3$ (A = K,Rb) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-36114