Topological states in superlattices of HgTe-class materials for engineering three-dimensional flat bands

Abstract

In search of materials with three-dimensional flat band dispersions, using {\em ab-initio} computations, we investigate how topological phases evolve as a function of hydrostatic pressure and uniaxial strain in two types of superlattices: HgTe/CdTe and HgTe/HgSe. In short-period HgTe/CdTe superlattices, our analysis unveils the presence of isoenergetic nodal lines, which could host strain-induced three-dimensional flat bands at the Fermi level without requiring doping, when fabricated, for instance, as core-shell nanowires. In contrast, HgTe/HgSe short-period superlattices are found to harbor a rich phase diagram with a plethora of topological phases. Notably, the unstrained superlattice realizes an ideal Weyl semimetal with Weyl points situated at the Fermi level. A small-gap topological insulator with multiple band inversions can be obtained by tuning the volume: under compressive uniaxial strain, the material transitions sequentially into a Dirac semimetal to a nodal-line semimetal, and finally into a topological insulator with a single band inversion.

arXiv comment19 pages, 16 figures. Paper accepted in Physical Review Research

References in corpus (62)

• Topological Insulators
• Topological insulators and superconductors
• Magic-angle graphene superlattices: a new platform for unconventional superconductivity
• Quantum Spin Hall Effect in Graphene
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Topological Insulators in Three Dimensions
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• WannierTools: An open-source software package for novel topological materials
• Weyl Semimetal in a Topological Insulator Multilayer
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Topological Crystalline Insulators
• Dirac semimetal in three dimensions
• Experimental discovery of Weyl semimetal TaAs
• Colloquium: Topological Band Theory
• Topological Crystalline Insulators in the SnTe Material Class
• Experimental realization of a topological crystalline insulator in SnTe
• Discovery of a Weyl Fermion semimetal state in NbAs
• Topological nodal line semimetals with and without spin-orbital coupling
• Model Hamiltonian for Topological Insulators
• Topological crystalline insulator states in Pb(1-x)Sn(x)Se
• Topological nodal line semimetals
• Quantum Anomalous Hall Effect in Hg${}_{1-y}$Mn${}_y$Te Quantum Wells
• Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
• Quantum Hall Effect from the Topological Surface States of Strained Bulk HgTe
• Observation of Quantum Spin Hall States in InAs/GaSb Bilayers under Broken Time-Reversal Symmetry
• Higher-order Topology of Axion Insulator EuIn${}_2$As${}_2$
• Symmetry-protected ideal Weyl semimetal in HgTe-class materials
• Ideal Weyl semimetals in the chalcopyrites CuTlSe2, AgTlTe2, AuTlTe2 and ZnPbAs2
• Probing quantum capacitance in a 3D topological insulator
• Persistent spin helix in Rashba-Dresselhaus ferroelectric CsBiNb2O7
• Topological Lifshitz Transitions and Fermi Arc Manipulation in Weyl Semimetal NbAs
• Temperature-induced topological phase transition in HgTe quantum wells
• Spin texture on the Fermi surface of tensile strained HgTe
• Nonlocal resistance and its fluctuations in microstructures of band-inverted HgTe/(Hg,Cd)Te quantum wells
• Kramers Nodal Line Metals
• Generic coexistence of Fermi arcs and Dirac cones on the surface of time-reversal invariant Weyl semimetals
• Designing three-dimensional flat bands in nodal-line semimetals
• Emergent quantum Hall effects below $50$ mT in a two-dimensional topological insulator
• Coupling charge and topological reconstructions at polar oxide interfaces
• Structural transition, metallization and superconductivity in quasi 2D layered PdS${}_2$ under compression
• Momentum-resolved spin splitting in Mn-doped trivial CdTe and topological HgTe semiconductors
• Coupling lattice instabilities across the interface in ultrathin oxide heterostructures
• Fractional Quantum Hall Effect in a Diluted Magnetic Semiconductor
• First principles feasibility assessment of a topological insulator at the InAs/GaSb interface
• Interplay of Dirac nodes and Volkov-Pankratov surface states in compressively strained HgTe
• Electronic properties of TaAs2 topological semimetal investigated by transport and ARPES
• Multiple band-crossings and Fermi surface topology: role of double nonsymmorphic symmetries in MnP-type crystal structures
• High-throughput screening for Weyl Semimetals with S${}_4$ Symmetry
• Realization of the Chern insulator and Axion insulator phases in antiferromagnetic $MnTe$-$B{i}_2(Se,Te{)}_3$-$MnTe$ heterostructures
• Superexchange dominates in magnetic topological insulators
• Three-dimensional quantum Hall effect and magnetothermoelectric properties in Weyl semimetals
• Saddle-like topological surface states on the TT'X family of compounds (T, T' = Transition metal, X= Si, Ge)
• Interface control of electronic transport across the magnetic phase transition in SrRuO_3/SrTiO_3 heterointerface
• Weyl Semimetals with $S_4$ symmetry
• Proximity Induced Superconductivity in CdTe-HgTe Core-Shell Nanowires
• CdTe-HgTe core-shell nanowire growth controlled by RHEED
• Surface-state spin textures in strained bulk HgTe: strain-induced topological phase transitions
• Absence of helical surface states in bulk semimetals with broken inversion symmetry

Cited by in corpus (11)

• Sign change of the anomalous Hall effect and the anomalous Nernst effect in Weyl semimetal CeAlSi
• Electronic and optical properties of InAs/InAs${}_{0.625}$Sb${}_{0.375}$ superlattices and their application to far-infrared detectors
• Switchable large-gap quantum spin Hall state in two-dimensional MSi${}_2$Z${}_4$ materials class
• Fast electrically switchable large gap quantum spin Hall states in MGe${}_2$Z${}_4$
• Engineering axion insulator phase in superlattices with inversion symmetry breaking
• Unprotected edge modes in quantum spin Hall insulator candidate materials
• CdTe and HgTe doped with V, Cr, and Mn -- prospects for the quantum anomalous Hall effect
• Topological phase diagram of Pb1-xSnxSe1-yTey
• Subband structure of a cylindrical HgTe nanowire: transition from normal type to inverted type
• Coexistence of Rashba and Dirac dispersions on the surface of centrosymmetric topological insulator decorated with transition metals
• Topological Lifshitz transition in Weyl semimetal NbP decorated with heavy elements