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Mapping out the emergence of topological features in the highly alloyed topological Kondo insulators SmB (=Eu, Ce)
Yishuai Xu, Erica C. Kotta, M. S. Song +9
SmB6 is a strongly correlated material that has been attributed as a topological insulator and a Kondo insulator. Recent studies have found the topological surface states and low t…
Semimetallic Nature and Magnetic Polarons in EuB6 Studied by Angle-Resolved Photoemission Spectroscopy
Chul-Hee Min, Boyoun Kang, Beong Ki Cho +3
Temperature-dependent angle-resolved photoemission spectroscopy (ARPES) was carried out on single-crystalline EuB6 samples. By measuring ARPES spectra in an extended Brillouin zone…
Bulk transport paths through defects in floating zone and Al flux grown SmB
Yun Suk Eo, Alexa Rakoski, Shriya Sinha +16
We investigate the roles of disorder on low-temperature transport in SmB crystals grown by both the Al flux and floating zone methods. We used the inverted resistance method wi…
Investigation of high-temperature bulk transport characteristics and skew scattering in samarium hexaboride
Alexa Rakoski, Yun Suk Eo, Çağlıyan Kurdak +3
A well-known feature in transport data of the topological Kondo insulator SmB is the sign change in the Hall coefficient at 65 K. Carriers in SmB are known to be negative,…
Robust surface states and coherence phenomena in magnetically alloyed SmB6
Lin Miao, Chul-Hee Min, Yishuai Xu +14
Samarium hexaboride is a candidate for the topological Kondo insulator state, in which Kondo coherence is predicted to give rise to an insulating gap spanned by topological surface…
Chemical and valence reconstruction at the surface of SmB6 revealed with resonant soft x-ray reflectometry
V. B. Zabolotnyy, K. Fürsich, R. J. Green +12
Samarium hexaboride (SmB), a Kondo insulator with mixed valence, has recently attracted much attention as a possible host for correlated topological surface states. Here, we us…
Irreversible proliferation of magnetic moments at cleaved surfaces of the topological Kondo insulator SmB6
Haowei He, Lin Miao, Edwin Augustin +10
The compound SmB is the best established realization of a topological Kondo insulator, in which a topological insulator state is obtained through Kondo coherence. Recent studie…
Valence Characterization of Surface and Subsurface Region in SmB6
P. Lutz, M. Thees, T. R. F. Peixoto +4
Samarium hexaboride (SmB6), which lies in the mixed valence regime in the Anderson model, has been predicted to possess topologically protected surface states. The intensive invest…
Universal properties of the near-gap spectra of SmB6: dynamical mean-field calculations and photoemission experiments
Chul-Hee Min, K. -S. Chen, P. Lutz +7
Samarium hexaboride (SmB6) has been presumed to show a topological Kondo insulating state consisting of fully occupied quasiparticle bands in the concept of a Fermi liquid. This ga…
Electronic structure of YbB: Is it a Topological Insulator or not?
Chang-Jong Kang, J. D. Denlinger, J. W. Allen +7
To resolve the controversial issue of the topological nature of the electronic structure of YbB, we have made a combined study using density functional theory (DFT) and angle…
The importance of Charge Fluctuations for the Topological Phase in SmB
Chul-Hee Min, P. Lutz, S. Fiedler +5
The discovery of topologically non-trivial states in band insulators has induced an extensive search for topological phase in strongly correlated electron systems. In particular, s…