Suppression and emergence of charge-density waves at the surfaces of layered 1T-TiSe2 and 1T-TaS2 by in situ Rb deposition

Details Suppression and emergence of charge-density waves at the surfaces of layered 1T-TiSe2 and 1T-TaS2 by in situ Rb deposition Suppression and emergence of charge-density waves at the surfaces of layered 1T-TiSe2 and 1T-TaS2 by in situ Rb deposition

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12l5018r&link_type=abstract

New Journal of Physics, Volume 12, Issue 12, pp. 125018 (2010).

Physics

3

Scientific paper

In situ real-time angle-resolved photoelectron spectroscopy is used to measure the electronic structure changes at the surfaces of the layered charge-density-wave materials 1T-TiSe2 and 1T-TaS2 during Rb deposition. For 1T-TiSe2, Rb adsorption at a sample temperature of 80 K causes a transition from a dirty semiconductor to a metal, in the course of which the p(2×2×2) charge-density wave is completely suppressed. For 1T-TaS2, Rb adsorption at room temperature is rapidly followed by intercalation, leading to a pronounced metal-to-insulator transition that is correlated with a structural change from the pristine nearly commensurate p(\sqrt{13}\times\sqrt{13}){\mathrm{R}}13.9^\circ superlattice to a commensurate c(2\sqrt{3} \times 4)rect . charge-density-wave phase. The implications of the results on the charge-density-wave mechanisms in both compounds are discussed with particular reference to the possible interplay of electron-phonon and electron-electron interactions. It is suggested that strong electron-phonon coupling drives the charge-density wave (CDW) phase transitions in pristine 1T-TiSe2 as well as in Rb intercalated 1T-TaS2, i.e. the transitions are interpreted as primarily Peierls-like instabilities or, in other words, Jahn-Teller band instabilities.

Affiliated with

Also associated with

No associations

Rating

Suppression and emergence of charge-density waves at the surfaces of layered 1T-TiSe2 and 1T-TaS2 by in situ Rb deposition 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 Suppression and emergence of charge-density waves at the surfaces of layered 1T-TiSe2 and 1T-TaS2 by in situ Rb deposition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Suppression and emergence of charge-density waves at the surfaces of layered 1T-TiSe2 and 1T-TaS2 by in situ Rb deposition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1309655