Transport properties and typical electron orbits in 2DEG under a local gradient magnetic field

Zhang, Xiaowei; Liu, Yuliang

doi:10.1016/j.physleta.2020.126613

Cited by 3 publications

(2 citation statements)

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“…The field of electron quantum optics studies and applies electromagnetic (EM) field-controlled phenomena for manipulating electron states in solid-state quantum systems. [1][2][3][4][5] Ideally, transport theories should describe both processes governing electron trajectories and wave phenomena such as interference and diffraction in multiple dimensions. Theories based on EM potentials rely on formal mathematical apparatus related to the choice of scalar and vector potentials, which, however, obscures the physical aspects and thus the heuristic understanding of electron evolution.…”

Section: Introductionmentioning

confidence: 99%

Non-uniform magnetic fields for single-electron control

Ballicchia,

Etl,

Nedjalkov

et al. 2024

Nanoscale

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Section: Introductionmentioning

confidence: 99%

Non-uniform magnetic fields for single-electron control

Ballicchia,

Etl,

Nedjalkov

et al. 2024

Nanoscale

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“…Quasi-two-dimensional (2D) electron systems can be realized when electrons are confined in one-dimensional potential wells, leaving only free motion in a two-dimensional plane. This results in sub-bands in the 2D plane with parabolic dispersion and stair-like DOS as a function of the energy. , Such 2DEG systems hosted by QWS widely exist at the interface of semiconductor heterojunctions, − III–V multiple quantum wells systems with multiple sub-bands, − surface reconstructions, and noble metal surfaces, , while playing important roles in field-effect devices, − superlattice devices with negative differential resistance (NDR), − the quantum Hall effect, − topologic quantum properties, and superconductivity. − …”

mentioning

confidence: 99%

Nearly Ideal Two-Dimensional Electron Gas Hosted by Multiple Quantized Kronig–Penney States Observed in Few-Layer InSe

Wang

Gao

et al. 2022

ACS Nano

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A theoretical ideal two-dimensional electron gas (2DEG) was characterized by a flat density of states independent of energy. Compared with conventional two-dimensional free-electron systems in semiconductor heterojunctions and noble metal surfaces, we report here the achievement of ideal 2DEG with multiple quantized states in few-layer InSe films. The multiple quantum well states (QWSs) in few-layer InSe films are found, and the number of QWSs is strictly equal to the number of atomic layers. The multiple stair-like DOS as well as multiple bands with parabolic dispersion both characterize ideal 2DEG features in these QWSs. Density functional theory calculations and numerical simulations based on quasi-bounded square potential wells described as the Kronig–Penney model provide a consistent explanation of 2DEG in the QWSs. Our work demonstrates that 2D van der Waals materials are ideal systems for realizing 2DEG hosted by multiple quantized Kronig–Penney states, and the semiconducting nature of the material provides a better chance for construction of high-performance electronic devices utilizing these states, for example, superlattice devices with negative differential resistance.

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