Half-Heusler topological insulators

Abstract

Ternary semiconducting or metallic half-Heusler compounds with an atomic composition 1:1:1 are widely studied for their flexible electronic properties and functionalities. Recently, a new material property of half-Heusler compounds was predicted based on electronic structure calculations: the topological insulator. In topological insulators, the metallic surface states are protected from impurity backscattering due to spin-momentum locking. This opens up new perspectives in engineering multifunctional materials. In this article, we introduce half Heusler materials from the crystallographic and electronic structure point of view. We present an effective model Hamiltonian from which the topological state can be derived, notably from a non-trivial inverted band structure. We discuss general implications of the inverted band structure with a focus on the detection of the topological surface states in experiments by reviewing several exemplary materials. Special attention is given to superconducting half-Heusler materials, which have attracted ample attention as a platform for non-centrosymmetric and topological superconductivity.

Published on MRS Bulletin, the focus issue on topological insulators. 20 Pages, 7 figures and 1 table

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Cited by in corpus (23)

• Topological Materials: Weyl Semimetals
• Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal NbP
• Heusler, Weyl, and Berry
• Topological quantum materials from the viewpoint of chemistry
• Observation of Unusual Topological Surface States in Half-Heusler Compounds LnPtBi (Ln=Lu, Y)
• Observation of pseudo two dimensional electron transport in the rock salt type topological semimetal LaBi
• Prediction of triple point fermions in simple half-Heusler topological insulators
• Model Hamiltonian and Time Reversal Breaking Topological Phases of Anti-ferromagnetic Half-Heusler Materials
• Magnetic and superconducting phase diagram of the half-Heusler topological semimetal HoPdBi
• Efficient spin current source using a half-Heusler alloy topological semimetal with Back-End-of-Line compatibility
• Band structure tuning of Heusler compounds revisited: Spin- and momentum-resolved electronic structure analysis of compounds with different band filling
• Topological Superconducting Vortex From Trivial Electronic Bands
• Two dimensional LiMgAs; a novel Topological Quantum Catalyst for Hydrogen Evolution Reaction
• High T${}_C$ ferromagnetic inverse Heusler alloys: A comparative study of Fe${}_2$RhSi and Fe${}_2$RhGe
• Unconventional superconductivity and Surface pairing symmetry in Half-Heusler Compounds
• Giant spin Hall effect in half-Heusler alloy topological semimetal YPtBi grown at low temperature
• High thermoelectric performance of half-Heusler compound BiBaK with intrinsically low lattice thermal conductivity
• Critical phenomena at the complex tensor ordering phase transition
• Anisotropic exchange and non-collinear antiferromagnets on a noncentrosymmetric fcc structure as in the half-Heuslers
• Insulating Half-Heusler TmPdSb with Unusual Band Order and Metallic Surface States
• Nonlinear Hall Effect in Antiferromagnetic Half-Heusler Materials
• Anomalous magnetotransport in the single-crystalline half-Heusler antiferromagnet ErPdSb
• Thermodynamic and electrical transport properties of the half-Heusler plumbide TbAuPb