Momentum-Dependent Hybridization Gap and dispersive in-gap state of The Kondo Semiconductor SmB6

Abstract

We report the temperature-dependent three-dimensional angle-resolved photoemission spectra of the Kondo semiconductor SmB${}_6$. We found a difference in the temperature dependence of the peaks at the X and $\Gamma$ points, due to hybridization between the Sm 5d conduction band and the nearly localized Sm 4f state. The peak intensity at the X point has the same temperature dependence as the valence transition below 120 K, while that at the $\Gamma$ point is consistent with the magnetic excitation at Q=(0.5,0.5,0.5) below 30 K. This suggests that the hybridization with the valence transition mainly occurs at the X point, and the initial state of the magnetic excitation is located at the $\Gamma$ point.

5 pages, 3 figures

References in corpus (2)

• A theory of Topological Kondo Insulators
• Theory of Spin Exciton in the Kondo Semiconductor $Yb{B}_{12}$

Cited by in corpus (63)

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• Observation of in-gap surface states in the Kondo insulator SmB6 by photoemission
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• Cubic Topological Kondo Insulators
• Polarity-driven surface metallicity in SmB${}_6$
• Hybridization gap and Fano resonance in SmB${}_6$
• Emergence of a coherent in-gap state in SmB6 Kondo insulator revealed by scanning tunneling spectroscopy
• Plutonium hexaboride is a correlated topological insulator
• Kondo hybridisation and the origin of metallic states at the (001) surface of SmB6
• The importance of Charge Fluctuations for the Topological Phase in SmB${}_6$
• Surface Kondo Effect and Non-Trivial Metallic State of the Kondo Insulator YbB12
• Topological invariants, surface states, and interaction-driven phase transitions in correlated Kondo insulators with cubic symmetry
• Interaction-driven transition between topological states in a Kondo insulator
• Surface Theory of a Family of Topological Kondo Insulators
• Anomalous 3D bulk AC conduction within the Kondo gap of SmB${}_6$ single crystals
• Observation of perfect Andreev reflection due to Klein paradox in a topological superconducting state
• Large, high quality single-crystals of the new Topological Kondo Insulator, SmB6
• Termination-dependent Surface In-gap States in a Mixed-valent Topological Insulator: SmB${}_6$
• Topological surface states interacting with bulk excitations in the Kondo insulator SmB${}_6$ revealed via planar tunneling spectroscopy
• SmB6 Photoemission: Past and Present
• Magnetotransport Measurements of the Surface States of Samarium Hexaboride using Corbino Structures
• Hysteretic Magnetotransport in SmB6 at Low Magnetic Fields
• Surface-state spin textures and mirror Chern numbers in topological Kondo insulators
• Magnetic and defect probes of the SmB${}_6$ surface state
• Band symmetries of mixed-valence topological insulator: SmB6
• Spin-polarized angle-resolved photoelectron spectroscopy of the so-predicted Kondo topological insulator SmB6
• Low-temperature magnetic fluctuations in the Kondo insulator SmB6
• Self-consistent GW method: O(N) algorithm for polarizability and self energy
• Temperature Dependence of Linked Gap and Surface State Evolution in the Mixed Valent Topological Insulator SmB6
• Non-trivial surface states of samarium hexaboride at the (111) surface
• A new exotic state in an old material: A tale of Samarium Hexaboride
• Surface and electronic structure of SmB${}_6$ through Scanning Tunneling Microscopy
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• Observation of a well-defined hybridization gap and in-gap states on the SmB6 (001) surface
• Two distinct topological phases in the mixed valence compound YbB6 and its differences from SmB6
• Comparative study of rare earth hexaborides using high resolution angle-resolved photoemission
• Chemical and valence reconstruction at the surface of SmB6 revealed with resonant soft x-ray reflectometry
• A Strongly-Interacting Dirac Liquid on the Surface of a Topological Kondo Insulator
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• The Effects of Spin-Excitons on the Surface States of SmB6: A Photoemission Study
• Crossover of Magnetoresistance from Fourfold to Twofold Symmetry in SmB6 Single Crystal, a topological Kondo insulator
• Spin- and angle-resolved photoemission on the topological Kondo Insulator candidate: SmB6
• Surface properties of SmB6 from x-ray photoelectron spectroscopy
• Planar tunneling spectroscopy of the topological Kondo insulator SmB${}_6$
• Topological Kondo semimetal and insulator in AB-stacked heterobilayer transition metal dichalcogenides
• Reduction of the low-temperature bulk gap in samarium hexaboride under high magnetic fields
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• Irreversible proliferation of magnetic moments at cleaved surfaces of the topological Kondo insulator SmB6
• Synthetic topological Kondo insulator in a pumped optical cavity
• Comparative Scanning Tunneling Microscopy Study on Hexaborides
• Breakdown of bulk-projected isotropy in surface electronic states of topological Kondo insulator SmB${}_6$(001)
• An STM perspective on hexaborides: Surface states of the Kondo insulator SmB${}_6$
• Topological nature of the Kondo insulator SmB${}_6$ and its sensitiveness to Sm vacancy
• Spontaneous symmetry breaking and quantum Hall valley ordering on the surface of topological hexaborides
• Topological surface states in the Kondo insulator YbB${}_{12}$ revealed via planar tunneling spectroscopy
• Bulk-Sensitive Spin-Resolved Resonant Electron Energy-Loss Spectroscopy (SR-rEELS): Observation of Element- and Spin-Selective Bulk Plasmons
• Emergent photovoltage on SmB6 surface upon bulk-gap evolution revealed by pump-and-probe photoemission spectroscopy
• An experimental algorithm for identifying the topological nature of Kondo and mixed valence insulators
• Electronic correlations and topology in Kondo insulator PuB${}_6$