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Spin texture of time-reversal symmetry invariant surface states on W(110)

Citace:
KUTNYAKHOV, D., CHERNOV, S., MEDJANIK, K., WALLAUER, R., TUSCHE, C., ELLGUTH, M., NEPIJKO, S. A., KRIVENKOV, M., BRAUN, J., BOREK, S., MINÁR, J., EBERT, H., ELMERS, H. J., SCHÖNHENSE, G. Spin texture of time-reversal symmetry invariant surface states on W(110). SCIENTIFIC REPORTS, 2016, roč. 6, č. JUL 12 2016, s. 1-7. ISSN: 2045-2322
Druh: ČLÁNEK
Jazyk publikace: eng
Anglický název: Spin texture of time-reversal symmetry invariant surface states on W(110)
Rok vydání: 2016
Autoři: D. Kutnyakhov , S. Chernov , K. Medjanik , R. Wallauer , C. Tusche , M. Ellguth , S. A. Nepijko , M. Krivenkov , J. Braun , S. Borek , Doc.Dr. Jan Minár , H. Ebert , H. J. Elmers , G. Schönhense
Abstrakt EN: We find in the case of W(110) previously overlooked anomalous surface states having their spin locked at right angle to their momentum using spin-resolved momentum microscopy. In addition to the well known Dirac-like surface state with Rashba spin texture near the ?-point, we observe a tilted Dirac cone with circularly shaped cross section and a Dirac crossing at 0.28 × ?N within the projected bulk band gap of tungsten. This state has eye-catching similarities to the spin-locked surface state of a topological insulator. The experiments are fortified by a one-step photoemission calculation in its density-matrix formulation.
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