首页/论文/2001.03081

arXiv 2001.030812020-01-09cond-mat.mes-hallphysics.app-ph

Periodically Gated Bilayer Graphene as an Electronic Metamaterial

Xianqing Lin, David Tomanek

备注：: 9 pages, 7 figures, accepted in Phys. Rev. Applied
发表信息：: Phys. Rev. Applied 13, 034034 (2020)
DOI：: 10.1103/PhysRevApplied.13.034034

英文摘要：

We study ballistic transport in periodically gated bilayer graphene as a candidate for a 2D electronic metamaterial. Our calculations use the equilibrium Green function formalism and take into account quantum corrections to charge density changes induced by a periodically modulated top gate voltage. Our results reveal an intriguing interference-like pattern, similar to that of a Fabry-Perot interferometer, in the resistance map as a function of the voltage $V_{BG}$ applied to the extended bottom gate and $V_{TG}$ applied to the periodic top gate.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

阅读原文

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

本文内容

英文摘要相关论文

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

继续探索

相关论文

Dynamically broken symmetry in periodically gated quantum dots: Charge accumulation and dc-current

Time-dependent electron transport through a quantum dot and double quantum dot systems in the presence of polychromatic external periodic quantum dot energy-level modulations is studied within the time evolution operator method for a tight-binding Hamiltonian. Analytical relations for the dc-current flowing through the system and the charge accumulated on a quantum dot are obtained for the zero-temperature limit. It is shown that in the presence of periodic perturbations the sideband peaks of the transmission are related to combination frequencies of the applied modulations. For a double quant…

2009-11-11cond-mat.mes-hall

Synthesizing Majorana zero-energy modes in a periodically gated quantum wire

We explore a scheme for engineering a one-dimensional spinless p-wave superconductor hosting unpaired Majorana zero-energy modes, using an all-electric setup with a spin-orbit coupled quantum wire in proximity to an s-wave superconductor. The required crossing of the Fermi level by a single spin-split energy band is ensured by employing a periodically modulated Rashba interaction, which, assisted by electron-electron interactions and a uniform Dresselhaus interaction, opens a gap at two of the spin-orbit shifted Fermi points. While an implementation in a hybrid superconductor-semiconductor dev…

2016-06-24cond-mat.mes-hallcond-mat.str-el

Unconventional band structure for a periodically gated surface of a three dimensional Topological Insulator

The surface states of the three dimensional (3D) Topological Insulators are described by two-dimensional (2D) massless dirac equation. A gate voltage induced one dimensional potential barrier on such surface creates a discrete bound state in the forbidden region outside the dirac cone. Even for a single barrier it is shown such bound state can create electrostatic analogue of Shubnikov de Haas oscillation which can be experimentally observed for relatively smaller size samples. However when these surface states are exposed to a periodic arrangement of such gate voltage induced potential barrie…

2015-10-30cond-mat.mes-hall

Homogenizing metamaterials, three times

The homogenization of a metamaterial made of a collection of scatterers periodically disposed is studied from three different points of view. Specifically tools for multiple scattering theory, functional analysis, differential geometry and optimization are used. Detailed numerical results are given and the connections between the different approaches are enlightened.

2012-11-08cond-mat.mes-hallmath-phmath.MP

Transverse hypercrystals formed by periodically modulated phonon-polaritons

Photonic crystals and metamaterials are two overarching paradigms for manipulating light. Combining the two approaches leads to hypercrystals: hyperbolic dispersion metamaterials that undergo periodic modulation and mix photonic-crystal-like aspects with hyperbolic dispersion physics. So far, there has been limited experimental realization of hypercrystals due to various technical and design constraints. Here, we create nanoscale hypercrystals with lattice constants ranging from 25 nm to 160 nm and measure their collective Bloch modes and dispersion with scattering nearfield microscopy. We dem…

2022-11-01cond-mat.mes-hallphysics.optics

Current driven "plasmonic boom" instability in three-dimensional gated periodic ballistic nanostructures

A new approach of using distributed transmission line analogy for solving transport equations for ballistic nanostructures is applied for solving the three dimensional problem of the electron transport in gated ballistic nanostructures with periodically changing width. The structures with the varying width allow for modulation of the electron drift velocity while keeping the plasma velocity constant. We predict that in such structures biased by a constant current, a periodic modulation of the electron drift velocity due the varying width results in the instability of the plasma waves if the el…

2015-07-30cond-mat.mes-hall

更多相关论文收起更多论文

轨道角动量聚焦光束在门控双层石墨烯中诱导的局域弗洛凯态

Localized Floquet states in gated bilayer graphene induced by a focused optical beam with orbital angular momentum

本文研究轨道角动量聚焦光束照射门控双层石墨烯，通过弗洛凯调控形成有效束缚势，实现可调的局域量子态，并可在参数设计下诱导谷极化二重简并零能弗洛凯态。

2024-04-01cond-mat.mes-hall

石墨烯二维超材料中由图案化栅极与抗点阵列形成的太赫兹马车

Terahertz ratchet in graphene 2D metamaterial formed by a patterned gate with an antidot arrayd

University of Regensburg（雷根斯堡大学）；National Cheng Kung University（国立成功大学）；National Institute for Materials Science（国立材料研究所）

研究通过图案化栅极与抗点阵列在石墨烯二维超材料中观察到太赫兹诱导的马车效应，通过电势和辐射电场的相互作用调控马车电流方向和大小。

2024-02-06cond-mat.mes-hall

Switching teraherz waves with gate-controlled active graphene metamaterials

The extraordinary electronic properties of graphene, such as its continuously gate-variable ambipolar field effect and the resulting steep change in resistivity, provided the main thrusts for the rapid advance of graphene electronics. The gate-controllable electronic properties of graphene provide a route to efficiently manipulate the interaction of low-energy photons with massless Dirac fermions, which has recently sparked keen interest in graphene plasmonics. However, the electro-optic tuning capability of unpatterned graphene alone is still not strong enough for practical optoelectronic app…

2012-03-04cond-mat.mes-hallphysics.optics

六方氮化硼上的双层石墨烯与量子超材料家族

Bilayer Graphene on hexagonal Boron Nitride and the Family of quantum MetaMaterial

本研究制备并表征双栅hBN/BLG超晶格，揭示其莫尔效应诱导的能隙、电场可调性及非平庸能带拓扑等特性，展现该体系物理的普适性与多样性。

2024-10-08cond-mat.mes-hall

Amplified-reflection plasmon instabilities in grating-gate plasmonic crystals

We identify a possible mechanism of the plasmon instabilities in periodically gated two-dimensional electron systems with a modulated electron density (plasmonic crystals) under direct current. The instability occurs due to the amplified reflection of the small density perturbations from the gated/ungated boundaries under the proper phase matching conditions between the crystal unit cells. Based on the transfer-matrix formalism, we derive the generic dispersion equation for the travelling plasmons in these structures. Its solution in the hydrodynamic limit shows that the threshold drift veloci…

2016-10-22cond-mat.mes-hall

Band gaps in graphene via periodic electrostatic gating

Much attention has been focused on ways of rendering graphene semiconducting. We study periodically gated graphene in a tight-binding model and find that, contrary to predictions based on the Dirac equation, it is possible to open a band gap at the Fermi level using electrostatic gating of graphene. However, comparing to other methods of periodically modulating graphene, namely perforated graphene structures, we find that the resulting band gap is significantly smaller. We discuss the intricate dependence of the band gap on the magnitude of the gate potential as well as the exact geometry of t…

2012-03-16cond-mat.mes-hall

Few-layer graphene patterned bottom gates for van der Waals heterostructures

We introduce a method of local gating for van der Waals heterostructures, employing a few-layer graphene patterned bottom gate. Being a member of the 2D material family, few-layer graphene adapts perfectly to the commonly used stacking method. Its versatility regarding patterning as well as its flatness make it an ideal candidate for experiments on locally gated 2D materials. Moreover, in combination with ultra-thin hexagonal boron nitride as an insulating layer, sharp potential steps can be created and the quality of the investigated 2D material can be sustained. To underline the good feasibi…

2017-03-16cond-mat.mes-hall