Engineering the topological surface states in the (Sb2)m−Sb2Te3(m=0–3) superlattice serie

We investigate the evolution of both the occupied and unoccupied electronic structure in representative compounds of the infinitely adaptive superlattice series (Sb2)m−Sb2Te3 (m=0–3) by means of angle-resolved photoemission spectroscopy and time-delayed two-photon photoemission, combined with first-principles band-structure calculations. We discover that the topological nature of the surface states and their spin texture are robust, with dispersions evolving from linear (Dirac-like) to parabolic (Rashba-like) along the series, as the materials evolve from semiconductors to semimetals. Our findings provide a promising strategy for engineering the topological states with the desired flexibility needed for realizing different quantum phenomena and spintronics applications.


Published in:
Physical Review B Condensed Matter, 91, 201101
Year:
2015
Publisher:
College Pk, Amer Physical Soc
ISSN:
0163-1829
Laboratories:




 Record created 2015-05-29, last modified 2018-03-18

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