Year: 2021
Type: article
Abstract: Recently monolayer jacutingaite (Pt2HgSe3), a naturally occurring exfoliable mineral, discovered in Brazil in 2008, has been theoretically predicted as a candidate quantum spin Hall system with a 0.5 eV band gap, while the bulk form is one of only a few known dual-topological insulators that may host different surface states protected by symmetries. In this work, we systematically investigate both structure and electronic evolution of bulk Pt2HgSe3 under high pressure up to 96 GPa. The nontrivial topology is theoretically stable, and persists up to the structural phase transition observed in the high-pressure regime. Interestingly, we found that this phase transition is accompanied by the appearance of superconductivity at around 55 GPa and the critical transition temperature Tc increases with applied pressure. Our results demonstrate that Pt2HgSe3 with nontrivial topology of electronic states displays a ground state upon compression and raises potentials in application to the next-generation spintronic devices.
Source: npj Quantum Materials
Language: English
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,240
Funders: Natural Science Foundation of Shanghai, Innovative Research Group Project of the National Natural Science Foundation of China, National Natural Science Foundation of China, Science and Technology Commission of Shanghai Municipality, Magyar Tudományos Akadémia, Jilin University, Česká geologická služba, ShanghaiTech University
Awards: 高压下准一维拓扑材料量子序及输运性质研究, G126842641, G1407937301, G1491216229, G1494773608, 高压下电子型掺杂稀土氢化物高温超导体的理论设计和物性研究, G2348892766, G272561041, G282808863, G311274938, G315123605, G3518137390, G368965652, G3785226268, G4115514511, G4515642776, G4675393368, G4744175978, G4886994431, G5017491369, G5476909144, G556780499, G5672321712, G5964250088, G6029936072, G6238187766, G6932017176, G7094047294, G7452060947, G8455872636
OpenAlex ID: W4200501249