Inducing Quantum Phase Transitions in Non-Topological Insulators Via Atomic Control of Sub-Structural Elements

Abstract

Topological insulators (TIs) are an important family of quantum materials that exhibit a Dirac point (DP) in the surface band structure but have a finite band gap in bulk. A large degree of spin-orbit interaction and low bandgap is a prerequisite for stabilizing DPs on selective atomically flat cleavage planes. Tuning of the DP in these materials has been suggested via modifications to the atomic structure of the entire system. Using the example of As${}_2$Te${}_3$ and ZnTe${}_5$, which are not TIs, we show that a quantum phase transition can be induced in atomically flat and stepped surfaces, for As${}_2$Te${}_3$ and ZrTe${}_5$, respectively. This is achieved by establishing a framework for controlling electronic properties that is focused on local perturbations at key locations that we call sub-structural elements (SSEs). We exemplify this framework through a novel method of isovalent sublayer anion doping and biaxial strain.

arXiv comment13 pages, 3 figures, 1 table

References in corpus (25)

• Topological Insulators
• Topological insulators and superconductors
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Topological quantum chemistry
• Crossover of Three-Dimensional Topological Insulator of Bi2Se3 to the Two-Dimensional Limit
• Topological Crystalline Insulators in the SnTe Material Class
• Chern Numbers in Discretized Brillouin Zone: Efficient Method of Computing (Spin) Hall Conductances
• Experimental realization of a topological crystalline insulator in SnTe
• Dirac materials
• Surface States of Topological Crystalline Insulators in IV-VI Semiconductors
• Ultra-thin Topological Insulator Bi2Se3 Nanoribbons Exfoliated by Atomic Force Microscopy
• Evidence for a strain tuned topological phase transition in ZrTe5
• Theoretical investigation of the evolution of the topological phase of Bi${}_2$Se${}_3$ under mechanical strain
• Circular dichroism of emergent chiral stacking orders in quasi-one-dimensional charge density waves
• Observation and control of the weak topological insulator state in ZrTe5
• 3D nature of ZrTe${}_5$ band structure measured by high-momentum-resolution photoemission spectroscopy
• Magnetic properties of small Pt-capped Fe, Co and Ni clusters: A density functional theory study
• In-situ strain tuning of the Dirac surface states in Bi2Se3 films
• Hidden, entangled and resonating order
• Topological phase transition and phonon-space Dirac topology surfaces in ZrTe${}_5$
• First Principles Modeling of Topological Insulators: Structural Optimization and Exchange Correlation Functionals
• The effect of hydrostatic pressure and uniaxial strain on the electronic structure of Pb${}_{\text{1-x}}$Sn${}_{\text{x}}$Te
• Temperature dependence of the energy band gap in ZrTe${}_5$: implications for the topological phase
• Spin Current Density Functional Theory of the Quantum Spin-Hall Phase
• Inter-quintuple layer coupling and topological phase transitions in the chalcogenide topological insulators