Picosecond Competing Dynamics of Apparent Semiconducting-Metallic Phase Transition in the Topological Insulator Bi2Se3

ACS Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 759-764 ◽  
Author(s):  
Sangwan Sim ◽  
Seungmin Lee ◽  
Jisoo Moon ◽  
Chihun In ◽  
Jekwan Lee ◽  
...  
Keyword(s):  
Phase Transition ◽  
Topological Insulator ◽  
Metallic Phase ◽  
Competing Dynamics

scholarly journals Phase transition and anomalous scaling in the quantum Hall transport of topological-insulator Sn−Bi1.1Sb0.9Te2S devices

2019 ◽  
Vol 99 (8) ◽  
Author(s):  
Faji Xie ◽  
Shuai Zhang ◽  
Qianqian Liu ◽  
Chuanying Xi ◽  
Ting-Ting Kang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Topological Insulator ◽  
Quantum Hall ◽  
Anomalous Scaling

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).

Insulating state and metallic phase transition of heavily sodium-doped low-silica X (LSX) zeolites

2012 ◽  
Vol 73 (12) ◽  
pp. 1538-1541 ◽  
Author(s):  
Yasuo Nozue ◽  
Yusaku Amako ◽  
Ryoko Kawano ◽  
Takahiro Mizukane ◽  
Takehito Nakano
Keyword(s):  
Phase Transition ◽  
Metallic Phase

scholarly journals Unexpected mass acquisition of Dirac fermions at the quantum phase transition of a topological insulator

2011 ◽  
Vol 7 (11) ◽  
pp. 840-844 ◽  
Author(s):  
T. Sato ◽  
Kouji Segawa ◽  
K. Kosaka ◽  
S. Souma ◽  
K. Nakayama ◽  
...  
Keyword(s):  
Phase Transition ◽  
Topological Insulator ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
Dirac Fermions

Pressure driven semi-metallic phase transition of Sb2Te3

2017 ◽  
Vol 209 ◽  
pp. 78-81 ◽  
Author(s):  
Junkai Zhang ◽  
Tingjing Hu ◽  
Jiejuan Yan ◽  
Feng Ke ◽  
Jingshu Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Metallic Phase ◽  
Pressure Driven

Functional Metamaterials Based on Mesoscale Gold Sponges, Particulate Aggregates, and Their Composites with Dielectric Materials

2006 ◽  
Vol 964 ◽  
Author(s):  
Michael Cortie ◽  
Abbas Maaroof ◽  
Geoff B Smith
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Plasmon Resonance ◽  
Composite Structures ◽  
Dielectric Materials ◽  
Continuous Phase ◽  
Metallic Phase ◽  
Dipole Approximation ◽  
Functional Material ◽  
Nanoscale Composites

ABSTRACTThe optical properties of some nanoscale composites may deviate from that expected from a simple law of mixture of their individual components. In these cases the resulting structure can be considered to be a type of “metamaterial”. Here we explore some of the possibilities for nanoscale composite structures comprised of gold and VO2 – the latter being a functional material that undergoes a reversible insulator to metallic phase transition at 68°C. Two microstructures are examined: aggregates of gold nanoparticles surrounded by VO2 as the continuous phase, and its geometric inverse, mesoporous gold sponge with discontinuous VO2 inclusions. A composite, right-angled parallelepiped measuring 40×100×100 nm is taken as representative of the mixture, and calculations of the optical properties performed using the discrete dipole approximation code of Draine and Flatau. The VO2 matrix strongly attenuates the dipole-dipole plasmon resonance of the gold structure, and thermochromic switching of the remaining plasmon resonance occurs

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