Charge dynamics of 2H-TaSe2 along the less-conducting c-Axis

Citation
B. Ruzicka et al., Charge dynamics of 2H-TaSe2 along the less-conducting c-Axis, PHYS REV L, 86(18), 2001, pp. 4136-4139
Citations number
14
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
18
Year of publication
2001
Pages
4136 - 4139
Database
ISI
SICI code
0031-9007(20010430)86:18<4136:CDO2AT>2.0.ZU;2-1
Abstract
We present an optical study of 2H-TaSe2 along the less conducting c-axis. T his dichalcogenide compound belongs to a large class of conductors called " bad metals" (with a mean free path smaller than the lattice constant along the c-axis), which also includes the superconducting cuprates. The optical response shows the progressive development of a pseudogaplike feature with decreasing temperature. The spectral weight lost by the opening of such a p seudogap goes into the narrow Drude component, developing at low frequency and temperature. There is no violation of the sum rule in 2H-TaSe2 contrary to the cuprates.