Direct Visualization and Manipulation of Tunable Quantum Well State in Semiconducting Nb2SiTe4
arXiv:2204.11259 · doi:10.1021/acsnano.1c03666
Abstract
Quantum well states (QWSs) can form at the surface or interfaces of materials with confinement potential. They have broad applications in electronic and optical devices such as high mobility electron transistor, photodetector and quantum well laser. The properties of the QWSs are usually the key factors for the performance of the devices. However, direct visualization and manipulation of such states are in general challenging. In this work, by using angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy/spectroscopy (STM/STS), we directly probe the QWSs generated on the vacuum interface of a narrow band gap semiconductor Nb2SiTe4. Interestingly, the position and splitting of QWSs could be easily manipulated via potassium (K) dosage onto the sample surface. Our results suggest Nb2SiTe4 to be an intriguing semiconductor system to study and engineer the QWSs, which has great potential in device applications.
arXiv comment28 pages, 5 figures,
References in corpus (19)
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Phosphorene: A New 2D Material with High Carrier Mobility
- Quantum Spin Hall Insulator State in HgTe Quantum Wells
- Maximally-localized generalized Wannier functions for composite energy bands
- WannierTools: An open-source software package for novel topological materials
- Electric Field Control of the LaAlO/SrTiO Interface Ground State
- Quantum Spin Hall Effect in Inverted Type II Semiconductors
- Large tuneable Rashba spin splitting of a two-dimensional electron gas in Bi2Se3
- Emergent quantum confinement at topological insulator surfaces
- Persistence of Topological Order and Formation of Quantum Well States in Topological Insulators Bi2(Se,Te)3 under Ambient Conditions
- Perfect Andreev Reflection of Helical Edge Modes in InAs/GaSb Quantum Wells
- Observation of monolayer valence band spin-orbit effect and induced quantum well states (QWS) in MoX2
- Nonlinear planar Hall effect
- Ubiquitous strong electron phonon coupling at the interface of FeSe/SrTiO3
- Quantum well states and amplified spin-dependent Friedel oscillations in thin films
- Spin-momentum locked interaction between guided photons and surface electrons in topological insulators
- Interband spin-orbit coupling between anti-parallel spin states in Pb quantum well states
- Quantum well states in fractured crystals of the heavy fermion material CeCoIn
- NbSiTe: A Stable Narrow-Gap Two-Dimensional Material with Ambipolar Transport and Mid-Infrared Response