Charge-Density-Wave Mechanism in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>2</mn><mi mathvariant="italic">H</mi><mi>−</mi><mrow><msub><mrow><mi>NbSe</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>: Photoemission Results

Th. Straub; Th. Finteis; R. Claessen; P. Steiner; S. Hüfner; P. Blaha; C. S. Oglesby; E. Bucher

doi:10.1103/PhysRevLett.82.4504

Charge-Density-Wave Mechanism in $2 H - {NbSe}_{2}$ : Photoemission Results

Th. Straub, Th. Finteis, R. Claessen, P. Steiner, S. Hüfner, P. Blaha, C. S. Oglesby, and E. Bucher

Phys. Rev. Lett. 82, 4504 – Published 31 May 1999

Abstract

The layered charge-density-wave (CDW) material $2 H - {NbSe}_{2}$ was studied by angle-resolved photoelectron spectroscopy. We present the first experimental mapping of the Fermi surface (FS) portions involved in the CDW transition. From this and additional data on the conduction band dispersion near the Fermi level we conclude that the CDW instability in this material is driven by FS nesting and not by saddle point singularities.

Received 13 October 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.4504

Authors & Affiliations

Th. Straub¹, Th. Finteis¹, R. Claessen^1,2,*, P. Steiner¹, S. Hüfner¹, P. Blaha³, C. S. Oglesby⁴, and E. Bucher⁵

¹Fachrichtung Experimentalphysik, Universität des Saarlandes, D-66041 Saarbrücken, Germany
²Experimentalphysik II, Universität Augsburg, D-86135 Augsburg, Germany
³Institut für Technische Elektrochemie, Technische Universität Wien, A-1060 Wien, Austria
⁴Lucent Technologies, Murray Hill, New Jersey 07974
⁵Fakultät für Physik, Universität Konstanz, D-78434 Konstanz, Germany