Topological phase transition and evolution of edge states in In-rich InGaN/GaN quantum wells under hydrostatic pressure

2016 ◽  
Vol 29 (5) ◽  
pp. 055702 ◽  
Author(s):  
S P Łepkowski ◽  
W Bardyszewski
Keyword(s):  
Phase Transition ◽  
Hydrostatic Pressure ◽  
Quantum Wells ◽  
Topological Phase ◽  
Edge States ◽  
Topological Phase Transition

scholarly journals Topological phase transition between a normal insulator and a topological metal state in a quasi-one-dimensional system

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Milad Jangjan ◽  
Mir Vahid Hosseini
Keyword(s):  
Phase Transition ◽  
Dimensional System ◽  
Inversion Symmetry ◽  
Topological Phase ◽  
Edge States ◽  
Zero Energy ◽  
One Dimensional ◽  
Topological Phase Transition ◽  
Metal State ◽  
Topological Metal

AbstractWe theoretically report the finding of a new kind of topological phase transition between a normal insulator and a topological metal state where the closing-reopening of bandgap is accompanied by passing the Fermi level through an additional band. The resulting nontrivial topological metal phase is characterized by stable zero-energy localized edge states that exist within the full gapless bulk states. Such states living on a quasi-one-dimensional system with three sublattices per unit cell are protected by hidden inversion symmetry. While other required symmetries such as chiral, particle-hole, or full inversion symmetry are absent in the system.

scholarly journals Experimental Observation of Temperature-Driven Topological Phase Transition in HgTe/CdHgTe Quantum Wells

2019 ◽  
Author(s):  
Maksim Zholudev ◽  
Aleksandr Kadykov ◽  
Mikhail Fadeev ◽  
Michal Marcinkiewicz ◽  
Sandra Ruffenach ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Quantum Wells ◽  
Topological Insulator ◽  
Critical Magnetic Field ◽  
Topological Phase ◽  
Temperature Dependent ◽  
Transition Parameter ◽  
Topological Phase Transition ◽  
Band Insulator

We report on comparison between temperature-dependent magneto¬absorption and magnetotransport spectroscopy of HgTe/CdHgTe quantum wells in terms of detection of phase transition between topological insulator and band insulator states. Our results demonstrate that temperature-dependent magnetospectroscopy is a powerful tool to discriminate trivial and topological insulator phases, yet magnetotransport method is shown to have advantages for clear manifestation of the phase transition with accurate quantitative values of transition parameter (i.e. critical magnetic field Bc).

scholarly journals Experimental Observation of Temperature-Driven Topological Phase Transition in HgTe/CdHgTe Quantum Wells

2019 ◽  
Vol 4 (1) ◽  
pp. 27 ◽  
Author(s):  
Maksim S. Zholudev ◽  
Aleksandr M. Kadykov ◽  
Mikhail A. Fadeev ◽  
Michal Marcinkiewicz ◽  
Sandra Ruffenach ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Quantum Wells ◽  
Topological Insulator ◽  
Critical Magnetic Field ◽  
Topological Phase ◽  
Temperature Dependent ◽  
Transition Parameter ◽  
Topological Phase Transition ◽  
Band Insulator

We report on the comparison between temperature-dependent magneto-absorption and magnetotransport spectroscopy of HgTe/CdHgTe quantum wells in terms of the detection of the phase transition between the topological insulator and band insulator states. Our results demonstrate that temperature-dependent magnetospectroscopy is a powerful tool to discriminate trivial and topological insulator phases, yet the magnetotransport method is shown to have advantages for the clear manifestation of the phase transition with accurate quantitative values of the transition parameter (i.e., critical magnetic field Bc).

scholarly journals Quantum spin Hall effect and topological phase transition in InNxBiySb1−x−y/InSb quantum wells

2017 ◽  
Vol 19 (7) ◽  
pp. 073031 ◽  
Author(s):  
Zhigang Song ◽  
Sumanta Bose ◽  
Weijun Fan ◽  
Dao Hua Zhang ◽  
Yan Yang Zhang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Wells ◽  
Hall Effect ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Topological Phase ◽  
Quantum Spin Hall Effect ◽  
Topological Phase Transition ◽  
Quantum Spin Hall

scholarly journals Topological phase transition and quantum spin Hall edge states of antimony few layers

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Sung Hwan Kim ◽  
Kyung-Hwan Jin ◽  
Joonbum Park ◽  
Jun Sung Kim ◽  
Seung-Hoon Jhi ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Spin ◽  
Topological Phase ◽  
Edge States ◽  
Topological Phase Transition ◽  
Quantum Spin Hall

scholarly journals Temperature-Induced Topological Phase Transition in HgTe Quantum Wells

2018 ◽  
Vol 120 (8) ◽  
Author(s):  
A. M. Kadykov ◽  
S. S. Krishtopenko ◽  
B. Jouault ◽  
W. Desrat ◽  
W. Knap ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Wells ◽  
Topological Phase ◽  
Topological Phase Transition

Prediction of topological phase transition in X2–SiGe monolayers

2016 ◽  
Vol 18 (5) ◽  
pp. 3669-3674 ◽  
Author(s):  
Rosalba Juarez-Mosqueda ◽  
Yandong Ma ◽  
Thomas Heine
Keyword(s):  
Phase Transition ◽  
Quantum Spin ◽  
Topological Phase ◽  
Edge States ◽  
Topological Phase Transition ◽  
Nontrivial Topology ◽  
Quantum Spin Hall

Quantum spin Hall (QSH) insulators exhibit a bulk insulting gap and metallic edge states characterized by nontrivial topology.

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