Realizing a topological diode effect on the surface of a topological Kondo insulator

Abstract

Introducing the concept of topology into material science has sparked a revolution from classic electronic and optoelectronic devices to topological quantum devices. The latter has potential for transferring energy and information with unprecedented efficiency. Here, we demonstrate a topological diode effect on the surface of a three-dimensional material, SmB6, a candidate topological Kondo insulator. The diode effect is evidenced by pronounced rectification and photogalvanic effects under electromagnetic modulation and radiation at radio frequency. Our experimental results and modeling suggest that these prominent effects are intimately tied to the spatially inhomogeneous formation of topological surface states (TSS) at the intermediate temperature. This work provides a manner of breaking the mirror symmetry (in addition to the inversion symmetry), resulting in the formation of pn-junctions between puddles of metallic TSS. This effect paves the way for efficient current rectifiers or energy-harvesting devices working down to radio frequency range at low temperature, which could be extended to high temperatures using other topological insulators with large bulk gap.

10 pages, 4 figures; SI is included in the published version

References in corpus (45)

• Topological Insulators
• Quantum nonlinear Hall effect induced by Berry curvature dipole in time-reversal invariant materials
• Observation of the nonlinear Hall effect under time reversal symmetric conditions
• Control over topological insulator photocurrents with light polarization
• Colossal Bulk Photovoltaic Effect in a Weyl Semimetal
• Hedgehog Spin-texture and Berry's Phase tuning in a Magnetic Topological Insulator
• Correlated Topological Insulators with Mixed Valence
• Spatial Fluctuations of Helical Dirac Fermions on the Surface of Topological Insulators
• Berry Curvature Enhanced Nonlinear Photogalvanic Response of Type-II Weyl Cone
• Topological surface state in the Kondo Insulator Samarium Hexaboride
• Robust Surface Hall Effect and Nonlocal Transport in SmB6: Indication for an Ideal Topological Insulator
• Zero-field superconducting diode effect in small-twist-angle trilayer graphene
• Imaging Dirac-Mass Disorder from Magnetic Dopant-Atoms in the Ferromagnetic Topological Insulator Cr${}_x$(Bi${}_{0.1}$Sb${}_{0.9}$)${}_{2-x}$Te${}_3$
• Room temperature nonlinear Hall effect and wireless RF rectification in Weyl semimetal TaIrTe4
• Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB6
• Quantum frequency doubling in the topological insulator Bi2Se3
• Giant spontaneous Hall effect in a nonmagnetic Weyl-Kondo semimetal
• Kondo Breakdown in Topological Kondo Insulators
• Realization of a vertical topological p-n junction in epitaxial $\mathrm{S}{\mathrm{b}}_2\mathrm{T}{\mathrm{e}}_3/B{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_3$ heterostructures
• Kondo Breakdown and Quantum Oscillations in SmB${}_6$
• Growth and Characterization of Hybrid Insulating Ferromagnet-Topological Insulator Heterostructure Devices
• Topological p-n Junction
• Shift charge and spin photocurrents in Dirac surface states of topological insulator
• Strong Room-Temperature Bulk Nonlinear Hall Effect in a Spin-Valley Locked Dirac Material
• Imaging emergent heavy Dirac fermions of a topological Kondo insulator
• Charge puddles in the bulk and on the surface of the topological insulator BiSbTeSe${}_2$ studied by scanning tunneling microscopy and optical spectroscopy
• Observation of perfect Andreev reflection due to Klein paradox in a topological superconducting state
• The energy gap of intermediate-valent SmB6 studied by point-contact spectroscopy
• Experimental realization of a topological p-n junction by intrinsic defect-grading
• In-plane Topological p-n Junction in the Three-Dimensional Topological Insulator Bi${}_{2-x}$Sb${}_x$Te${}_{3-y}$Se${}_y$
• Topological surface states interacting with bulk excitations in the Kondo insulator SmB${}_6$ revealed via planar tunneling spectroscopy
• Robustness of the Insulating Bulk in the Topological Kondo Insulator SmB${}_6$
• Coexistence of light and heavy surface states in a topological multi-band Kondo insulator
• Magnetic and defect probes of the SmB${}_6$ surface state
• Effect of bulk charged impurities on the bulk and surface transport in three-dimensional topological insulators
• Tkwant: a software package for time-dependent quantum transport
• Observation of a well-defined hybridization gap and in-gap states on the SmB6 (001) surface
• Nonlinear optical diode effect in a magnetic Weyl semimetal
• Charge puddles in a completely compensated topological insulator
• Radio Frequency Tunable Oscillator Device Based on SmB6 Microcrystal
• Understanding low-temperature bulk transport in samarium hexaboride without relying on in-gap bulk states
• Spin-selective tunneling from nanowires of the candidate topological Kondo insulator SmB6
• An STM perspective on hexaborides: Surface states of the Kondo insulator SmB${}_6$
• Realizing a topological diode effect on the surface of a topological Kondo insulator
• Anomalously large spin-current voltages on the surface of SmB${}_6$

Cited by in corpus (2)

• Realizing a topological diode effect on the surface of a topological Kondo insulator
• Enhanced Superconducting Diode Effect in the Asymmetric Hatsugai-Kohmoto Model