Quasiparticle spectra, charge-density waves, superconductivity, and electron-phonon coupling in 2H-NbSe2 -: art. no. 086401

被引：179

作者：

Valla, T ^{[1
]}

Fedorov, AV

Johnson, PD

Glans, PA

McGuinness, C

Smith, KE

Andrei, EY

Berger, H

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[2] Boston Univ, Dept Phys, Boston, MA 02215 USA

[3] Rutgers State Univ, Dept Phys, Piscataway, NJ 08854 USA

[4] Ecole Polytech Fed Lausanne, Inst Phys Complex Matter, CH-1015 Lausanne, Switzerland

[5] LBNL, Adv Light Source, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.92.086401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High-resolution photoemission has been used to study the electronic structure of the charge-density wave (CDW) and superconducting dichalcogenide, 2H-NbSe2. From the extracted self-energies, important components of the quasiparticle interactions have been identified. In contrast to previously studied TaSe2, the CDW transition does not affect the electronic properties significantly. The electron-phonon coupling is identified as a dominant contribution to the quasiparticle self-energy and is shown to be very anisotropic (k dependent) and much stronger than in TaSe2.

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