The electronic transport efficiency of a graphene charge carrier guider and an Aharanov–Bohm interferometer

Wei, Xuan; Zhang, Wenjing; Cheng, Shu-guang

doi:10.1088/1361-648x/aae9d3

Cited by 5 publications

(3 citation statements)

References 67 publications

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“…In particular, the authors studied the dependence of the confined waveguide modes on the potential difference, waveguide width, and side barriers. In similar research, Wei et al used graphene waveguides to build and analyze a four-terminal gate defined waveguide and an Aharanov-Bohm interferometer [243]. The authors used an NEGF approach (Landauer-Büttiker for spin-dependent current) and highlighted and discussed the predicted conductance plateaus and relations to experimental results.…”

Section: D Materialsmentioning

confidence: 99%

Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems

Weinbub

Kosik

2022

J. Phys.: Condens. Matter

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Quantum electronics has significantly evolved over the last decades. Where initially the clear focus was on light-matter interactions, nowadays approaches based on the electron's wave nature have solidified themselves as additional focus areas. This development is largely driven by continuous advances in electron quantum optics, electron based quantum information processing, electronic materials, and nanoelectronic devices and systems. The pace of research in all of these areas is astonishing and is accompanied by substantial theoretical and experimental advancements. What is particularly exciting is the fact that the computational methods, together with broadly available large-scale computing resources, have matured to such a degree so as to be essential enabling technologies themselves. These methods allow to predict, analyze, and design not only individual physical processes but also entire devices and systems, which would otherwise be very challenging or sometimes even out of reach with conventional experimental capabilities. This review is thus a testament to the increasingly towering importance of computational methods for advancing the expanding field of quantum electronics. To that end, computational aspects of a representative selection of recent research in quantum electronics are highlighted where a major focus is on the electron's wave nature. By categorizing the research into concrete technological applications, researchers and engineers will be able to use this review as a source for inspiration regarding problem-specific computational methods.

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Section: D Materialsmentioning

confidence: 99%

Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems

Weinbub

Kosik

2022

J. Phys.: Condens. Matter

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“…1(a)]. We demonstrate the versatility of CNT-induced guiding channels in graphene, which can be utilized to form extremely narrow and sharp guiding channels, electrostatically-defined quantum rings [33,46], point-like sources [3], interferometers, and other building blocks for nanodevices. Their application is not limited to single-layer graphene (SLG), and, as we show in the following, it can also be utilized in other materials, including Bernal-stacked bilayer graphene (BLG), decoupled twisted bilayer graphene (dtBLG), and semiconductor nanostructures hosting two-dimensional electron gas (2DEG).…”

Section: Introductionmentioning

confidence: 99%

Manipulating electron waves in graphene using carbon nanotube gating

Chiu,

Mreńca-Kolasińska,

Lei

et al. 2022

Preprint

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Graphene with its dispersion relation resembling that of photons offers ample opportunities for applications in electron optics. The spacial variation of carrier density by external gates can be used to create electron waveguides, in analogy to optical fiber, with additional confinement of the carriers in bipolar junctions leading to the formation of few transverse guiding modes. We show that waveguides created by gating graphene with carbon nanotubes (CNTs) allow obtaining sharp conductance plateaus, and propose applications in Aharonov-Bohm and two-path interferometers, and point-like source for injection of carriers in graphene. Other applications can be extended to Bernal-stacked or twisted bilayer graphene or two-dimensional electron gas. Thanks to their versatility, CNT-induced waveguides open various possibilities for electron manipulation in graphene-based devices.

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“…For instance, in condensed matter systems like graphene and carbon nanotubes, the AB effect introduces oscillations in the energy gap of these structures [10,11]. Also, it is possible to create AB interferometers to perform transport measurements in graphene [12]. The AB effect also can occur in the relativistic domain [13].…”

Section: Introductionmentioning

confidence: 99%

Effects of rotation and Coulomb type potential on the spin-1/2 Aharonov-Bohm problem

Cunha¹,

Andrade²,

Silva³

2021

Preprint

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In this work, we investigate how both rotation and a Coulomb potential affect the quantum mechanical description of a spin-1/2 particle in the presence of the Aharonov-Bohm effect. We employ the method of the self-adjoint extensions in the framework of the Pauli-Schrödinger equation. We discuss the role of the spin degree of freedom on this problem, find the energy spectrum, and investigate the results in detail.

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The electronic transport efficiency of a graphene charge carrier guider and an Aharanov–Bohm interferometer

Cited by 5 publications

References 67 publications

Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems

Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems

Manipulating electron waves in graphene using carbon nanotube gating

Effects of rotation and Coulomb type potential on the spin-1/2 Aharonov-Bohm problem

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