Relativistic effects on the surface electronic structure of Cu(001): Observation of a spin-orbit-gap surface state
- 15 March 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 33 (6), 4373-4375
- https://doi.org/10.1103/physrevb.33.4373
Abstract
A second Cu(001) M¯ surface state located near the d-band maximum has been characterized using angle-resolved photoemission. High energy resolution, provided by a new dispersive spectrometer, was necessary to identify and characterize the surface state. At M¯ the state, which has odd parity with respect to the (100) mirror plane, lies 65 meV below the d-band maximum, at 2.113 eV binding energy. Comparison with the surface projection of a recently calculated relativistic bulk band structure, indicates that this state lies in an absolute spin-orbit gap. The gap extends along one third of Σ¯ in the surface Brillouin zone.Keywords
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