Photoemission study of the surface electronic structure of W(001)
- Department of Physics, University of Oregon, Eugene, Oregon 97403 (United States)
We report a high-resolution angle-resolved photoemission study of the surface electronic structure of the high-temperature phase of W(001). We have focused particularly upon the electron states within a few electron volts of the Fermi level in an attempt to characterize the interplay between the electronic and atomic structures of this surface. We relate these measurements of the surface band structure along the high-symmetry directions to the surface Fermi contours published recently. Most importantly, we observe a band to be located at or near the Fermi level over a sizable region of momentum space, approximately centered on the {bar {Sigma}} line between {bar {Gamma}} and {ital {bar M}}. This feature is well placed to couple to phonon modes characteristic of the low-temperature {ital c}(2{times}2) structure observed on this surface. We find that the spin-orbit interaction has a profound influence on the topology of the bands that are involved in driving the surface to reconstruct. The relationship of these results to existing calculations, to the wave vector of the reconstruction, and to recent measurements of surface phonon-dispersion relations will be discussed.
- DOE Contract Number:
- FG06-86ER45275
- OSTI ID:
- 6078960
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:19; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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