Charge-density-wave mechanism in 2H-NbSe2: Photoemission results

Authors
Straub, T Finteis, T Claessen, R Steiner, P Hufner, S Blaha, P Oglesby, CS Bucher, E
Citation
T. Straub et al., Charge-density-wave mechanism in 2H-NbSe2: Photoemission results, PHYS REV L, 82(22), 1999, pp. 4504-4507
Citations number
24
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
82
Issue
22
Year of publication
1999
Pages
4504 - 4507
Database
ISI
SICI code
0031-9007(19990531)82:22<4504:CMI2PR>2.0.ZU;2-8
Abstract
The layered charge-density-wave (CDW) material 2H-NbSe2 was studied by angl e-resolved photoelectron spectroscopy. We present the first experimental ma pping of the Fermi surface (FS) portions involved in the CDW transition. Fr om this and additional data on the conduction band dispersion near the Ferm i level we conclude that the CDW instability in this material is driven by FS nesting and not by saddle point singularities. [S0031-9007(99)09298-4].