SmB6 Photoemission: Past and Present

Abstract

Recent renewed interest in the mixed valent insulator SmB6 comes from topological theory predictions and surface transport measurements of possible in-gap surface states whose existence is most directly probed by angle-resolved photoemission spectroscopy (ARPES). Early photoemission leading up to a recent flurry of ARPES studies of in-gap states is reviewed. Conflicting interpretations about the nature of the Sm 4f-5d hybridization gap and observed X-point bands between the f-states and the Fermi level are critically assessed using the important tools of photon polarization and spatial dependence which also provide additional insight into the origin of the more ambiguous Γ-point in-gap states.

arXiv comment10 pages, 6 figures, SCES2013 proceedings; references updated

References in corpus (12)

• Topological Kondo Insulators
• Surface electronic structure of the topological Kondo insulator candidate correlated electron system SmB6
• Low-temperature surface conduction in the Kondo insulator SmB${}_6$
• Correlated Topological Insulators with Mixed Valence
• Robust Surface Hall Effect and Nonlocal Transport in SmB6: Indication for an Ideal Topological Insulator
• Observation of in-gap surface states in the Kondo insulator SmB6 by photoemission
• A theory of Topological Kondo Insulators
• Surface and Bulk Electronic Structure of the Strongly Correlated System SmB${}_6$ and Implications for a Topological Kondo Insulator
• Polarity-driven surface metallicity in SmB${}_6$
• Momentum-Dependent Hybridization Gap and dispersive in-gap state of The Kondo Semiconductor SmB6
• Kondo hybridisation and the origin of metallic states at the (001) surface of SmB6
• The energy gap of intermediate-valent SmB6 studied by point-contact spectroscopy

Cited by in corpus (33)

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• Surface Kondo Effect and Non-Trivial Metallic State of the Kondo Insulator YbB12
• 4$f$ crystal field ground state of the strongly correlated topological insulator SmB${}_6$
• Band symmetries of mixed-valence topological insulator: SmB6
• Bulk Fermi surface of charge-neutral excitations in SmB6 or not: a heat-transport study
• Bulk and surface electronic properties of SmB6: a hard x-ray photoelectron spectroscopy study
• Racah materials: role of atomic multiplets in intermediate valence systems
• Consistency between ARPES and STM measurements on SmB${}_6$
• Properties of the donor impurity band in mixed valence insulators
• Fractionalized Fermi liquid on the surface of a topological Kondo insulator
• Suppression of magnetic excitations near the surface of the topological Kondo insulator SmB6
• Valence Characterization of Surface and Subsurface Region in SmB6
• Critical role of magnetic moments in heavy-fermion materials: revisiting mysteries of SmB${}_6$
• Spin- and angle-resolved photoemission on the topological Kondo Insulator candidate: SmB6
• Topology of SmB${}_6$ determined by dynamical mean field theory
• A RIXS investigation of the crystal-field splitting of Sm${}^{3+}$ in SmB${}_6$
• Understanding low-temperature bulk transport in samarium hexaboride without relying on in-gap bulk states
• Universal properties of the near-gap spectra of SmB6: dynamical mean-field calculations and photoemission experiments
• Robust surface states and coherence phenomena in magnetically alloyed SmB6
• Surface exceptional points in a topological Kondo insulator
• Irreversible proliferation of magnetic moments at cleaved surfaces of the topological Kondo insulator SmB6
• From bad metal to Kondo insulator: temperature evolution of the optical properties of SmB${}_6$
• Flat-band hybridization between $f$ and $d$ states near the Fermi energy of SmCoIn${}_5$
• Tunable Kondo resonance at a pristine two-dimensional Dirac semimetal on a Kondo insulator
• Charge fluctuations in the intermediate-valence ground state of SmCoIn${}_5$
• Topology of SmB6 revisited by means of topological quantum chemistry
• Mixed-valence state in the dilute-impurity regime of La-substituted SmB${}_6$
• Mapping out the emergence of topological features in the highly alloyed topological Kondo insulators Sm${}_{1-x}{M}_x$B${}_6$ ($M$=Eu, Ce)
• f-electron charge densities probed using core level non-resonant inelastic x-ray scattering
• Large ferromagnetic-like band splitting in ultrathin ${\mathrm{SmC}}_6$ films