Circular dichroism in angle-resolved photoemission spectroscopy of topological insulators
نویسندگان
چکیده
منابع مشابه
Observation of a warped helical spin texture in Bi2Se3 from circular dichroism angle-resolved photoemission spectroscopy.
A differential coupling of topological surface states to left- versus right-circularly polarized light is the basis of many optospintronics applications of topological insulators. Here we report direct evidence of circular dichroism from the surface states of Bi(2)Se(3) using laser-based time-of-flight angle-resolved photoemission spectroscopy. By employing a novel sample rotational analysis, w...
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We use angle-resolved photoemission with circularly polarized excitation to demonstrate that in the 5 x 1 superstructure-free (Pb,Bi)(2)Sr(2)CaCu(2)O(8+delta) (Pb-Bi2212) material there are no signatures of time-reversal symmetry breaking in the sense of the criteria developed earlier [Nature (London) 416, 610 (2002)]]. The dichroic signal retains reflection antisymmetry as a function of temper...
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Single crystal Bi2Se3 (slightly doped with As to improve its cleaving properties) was grown by melting a 10 g stoichiometric mixture of Bi and Se shot with trace amounts of As powder (x=0.00129) in an evacuated quartz tube at 850◦C [S1]. After 12 hours at this temperature, the mixture was cooled to 720◦C over 2 hours, then slowly cooled to 650◦C over 2 days. The batch was annealed at 650◦C for ...
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YbB6 is recently predicted to be a moderately correlated topological insulator, which provides a playground to explore the interplay between correlation and topological properties. With angle-resolved photoemission spectroscopy, we directly observed almost linearly dispersive bands around the time-reversal invariant momenta and with negligible kz dependence, consistent with odd number of surfac...
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ژورنال
عنوان ژورنال: physica status solidi (RRL) - Rapid Research Letters
سال: 2013
ISSN: 1862-6254
DOI: 10.1002/pssr.201206458