The Zintl phase compounds AEIn<sub>2</sub>As<sub>2</sub> (AE = Ca, Sr, Ba): topological phase transition under pressure
Wen-Ti Guo, Zhigao Huang, Jian‐Min Zhang
Abstract
space group in the absence of pressure and identified that they are all non-trivial topological insulators. Next, Bader charge and AIM topology analysis elucidate the nature of pressure-induced chemical bond enhancement. Lastly, we have discovered pressure-controllable band gap closure while the topologically protected surface states disappear, realizing insulator-metal phase transition and topological quantum phase transition. Our research not only enriches the family of topological insulators but also provides a good platform for the study of thermoelectric properties.
Topics & Concepts
Topological insulatorTopology (electrical circuits)Phase transitionThermoelectric effectTopological orderQuantum phase transitionCondensed matter physicsBand gapInsulator (electricity)Phase (matter)Materials scienceQuantumPhysicsQuantum mechanicsOptoelectronicsMathematicsCombinatoricsTopological Materials and Phenomena2D Materials and ApplicationsAdvanced Thermoelectric Materials and Devices