Evidence of topological insulator state in the semimetal LaBi

R Lou, BB Fu, QN Xu, PJ Guo, LY Kong, LK Zeng… - Physical Review B, 2017 - APS
By employing angle-resolved photoemission spectroscopy combined with first-principles
calculations, we performed a systematic investigation on the electronic structure of LaBi …

Layered topological insulators and semimetals for magnetoresistance type sensors

M Zhang, X Wang, F Song… - Advanced Quantum …, 2019 - Wiley Online Library
Magnetoresistance (MR) type sensors are transducers that can vary their resistances
sensitively in response to an applied magnetic field. Recently, topological quantum …

Electronic Structure of the Metastable Epitaxial Rock-Salt SnSe Topological Crystalline Insulator

W Jin, S Vishwanath, J Liu, L Kong, R Lou, Z Dai… - Physical Review X, 2017 - APS
Topological crystalline insulators have been recently predicted and observed in rock-salt
structure SnSe {111} thin films. Previous studies have suggested that the Se-terminated …

Many-body corrected tight-binding Hamiltonians for an accurate quasiparticle description of topological insulators of the family

I Aguilera, C Friedrich, S Blügel - Physical Review B, 2019 - APS
We generate many-body corrected tight-binding Hamiltonians for topological insulators of
the Bi 2 Se 3 family. To this end, we use ab initio calculated parameters extracted from GW …

Finite-Size and Composition-Driven Topological Phase Transition in (Bi1–xInx)2Se3 Thin Films

M Salehi, H Shapourian, N Koirala, MJ Brahlek… - Nano …, 2016 - ACS Publications
In a topological insulator (TI), if its spin–orbit coupling (SOC) strength is gradually reduced,
the TI eventually transforms into a trivial insulator beyond a critical point of SOC, at which …

Dimensional crossover and topological nature of the thin films of a three-dimensional topological insulator by band gap engineering

Z Wang, T Zhou, T Jiang, H Sun, Y Zang, Y Gong… - Nano Letters, 2019 - ACS Publications
Identification and control of topological phases in topological thin films offer great
opportunities for fundamental research and the fabrication of topology-based devices. Here …

Photoexcited Free Carrier Dynamics in Bi2Se3, (Bi0.75In0.25)2Se3, and (Bi0.50In0.50)2Se3: From Topological to Band Insulator

T Shi, K Kushnir, Z Wang, S Law, LV Titova - ACS Photonics, 2020 - ACS Publications
Replacing some Bi with In in Bi2Se3 transforms it from a topological insulator to a band
insulator. Here, we have used time-resolved terahertz spectroscopy to investigate …

Properties of bismuth based Bi2A3 (A= S, Se, Te) chalcogenides for optoelectronic and thermoelectric applications

A Javed, M Haseeb, A Hussain, MA Rafiq - Solid State Communications, 2024 - Elsevier
Abstract Structural, electronic, optical, mechanical, thermoelectric and dielectric properties of
binary Bi 2 A 3 (A= S, Se, Te) chalcogenide semiconductors are studied by first-principles …

Anomalous behavior of the electronic structure of ( across the quantum phase transition from topological to trivial insulator

J Sánchez-Barriga, I Aguilera, LV Yashina… - Physical Review B, 2018 - APS
Using spin-and angle-resolved photoemission spectroscopy and relativistic many-body
calculations, we investigate the evolution of the electronic structure of (Bi 1− x In x) 2 Se 3 …

Realization of p-type In1. 75Sb0. 25Se3 alloys for short-wave infrared photodetectors

S Li, Y Yan, J Li, M Qian, C Shen, X Song… - Applied Physics …, 2022 - pubs.aip.org
The narrow-gap semiconductors (NGSs) with two-dimensional (2D) layered structures
provide fundamental advantages, such as low noise and high quantum efficiency, for short …