Evidence for two electronic components in NaxCoO2 (x = 0.7-0.75)

Details Evidence for two electronic components in NaxCoO2 (x = 0.7-0.75) Evidence for two electronic components in NaxCoO2 (x = 0.7-0.75)

2003-09-12

arxiv.org/abs/cond-mat/0309311v1

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, 4 figures

Scientific paper

Thermodynamic and transport measurements on NaxCoO2 (x ~ 0.7-0.75) over a wide temperature range reveal a strongly enhanced low energy excitation spectrum. The zero-field specific heat and resistance at low temperature are proportional to T^n with n<1, in sharp contrast to behavior found in ordinary Landau Fermi-liquid metals. For temperatures below ~5 K this unusual excitation seen in the specific heat is partially suppressed in a magnetic field, following a T/B scaling. The specific heat reduction at low T is partially compensated by an increase at higher temperature. A quantitative comparison with the magnetoresistance and the thermopower indicates that the low- energy electronic state requires a description beyond the single band model.

Affiliated with

Also associated with

No associations

Rating

Evidence for two electronic components in NaxCoO2 (x = 0.7-0.75) 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 Evidence for two electronic components in NaxCoO2 (x = 0.7-0.75), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for two electronic components in NaxCoO2 (x = 0.7-0.75) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-230222