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Anomalous d-like surface resonances on Mo(110) analyzed by time-of-flight momentum microscopy

Citace:
CHERNOV, S., MEDJANIK, K., TUSCHE, C., KUTNYAKHOV, D., NEPIJKO, S., OELSNER, A., BRAUN, J., MINÁR, J., BOREK, S., EBERT, H., ELMERS, H., KIRSCHER, J., SCHÖNHENSE, G. Anomalous d-like surface resonances on Mo(110) analyzed by time-of-flight momentum microscopy. Ultramicroscopy, 2015, roč. 159, č. 3, s. 453-463. ISSN: 0304-3991
Druh: ČLÁNEK
Jazyk publikace: eng
Anglický název: Anomalous d-like surface resonances on Mo(110) analyzed by time-of-flight momentum microscopy
Rok vydání: 2015
Autoři: S.V. Chernov , K. Medjanik , C. Tusche , D. Kutnyakhov , S.A. Nepijko , A. Oelsner , J. Braun , Doc.Dr. Jan Minár , S. Borek , H. Ebert , H.J. Elmers , J. Kirscher , G. Schönhense
Abstrakt EN: The electronic surface states on Mo(110) have been investigated using time-of-flight momentum microscopy with synchrotron radiation (h? 1435 eV). This novel angle-resolved photoemission approach yields a simultaneous acquisition of the E-vs-k spectral function in the full surface Brillouin zone and several eV energy interval. (kx,ky,EB)-maps with 3.4 ? diameter reveal a rich structure of d-like surface resonances in the spin?orbit induced partial band gap. Calculations using the one-step model in its density matrix formulation predict an anomalous state with Dirac-like signature and Rashba spin texture crossing the bandgap at ? and EB = 1.2 eV. The experiment shows that the linear dispersion persists away from the ?-point in an extended energy- and k?-range. Analogously to a similar state previously found on W(110) the dispersion is linear along H ? ? ? H and almost zero along N ? ? ? N . The similarity is surprising since the spin?orbit interaction is 5 times smaller in Mo. A second point with unusual topology is found midway between ? and N. Band symmetries are probed by linear dichroism.
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