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Magnetic tunnel junctions for spin-transfer torque switching were prepared to investigate the dielectric breakdown. The breakdown occurs typically at voltages not much higher than the switching voltages, a bottleneck for the implementation…

Materials Science · Physics 2015-05-13 M. Schäfers , V. Drewello , G. Reiss , A. Thomas , K. Thiel , G. Eilers , M. Münzenberg , H. Schuhmann , M. Seibt

We consider reflection and transmission of polarized paraxial light beams at a plane dielectric interface. The field transformations taking into account a finite beam width are described based on the plane-wave representation and geometric…

Optics · Physics 2013-01-18 Konstantin Y. Bliokh , Andrea Aiello

Recently, great experimental efforts towards designing topological electronic states have been invested in layered incommensurate heterostructures which form various nano- and meso-scale domains. In particular, it has become clear that a…

Mesoscale and Nanoscale Physics · Physics 2022-07-27 Jean-Baptiste Touchais , Pascal Simon , Andrej Mesaros

Motivated by the realization of the Dirac point (DP) with a double-cone structure for optical field in the negative-zero-positive index metamaterial (NZPIM), the reflection, transmission, and Goos-H\"{a}nchen (GH) shifts inside the NZPIM…

Optics · Physics 2009-10-28 Xi Chen , Li-Gang Wang , Chun-Fang Li

In twisted h-BN/graphene heterostructures, the complex electronic properties of the fast-traveling electron gas in graphene are usually considered to be fully revealed. However, the randomly twisted heterostructures may also have unexpected…

Wrinkling is a ubiquitous phenomenon in two-dimensional membranes. In particular, in the large-scale growth of graphene on metallic substrates, high densities of wrinkles are commonly observed. Despite their prevalence and potential impact…

Mesoscale and Nanoscale Physics · Physics 2012-07-13 Wenjuan Zhu , Tony Low , Vasili Perebeinos , Ageeth A. Bol , Yu Zhu , Hugen Yan , Jerry Tersoff , Phaedon Avouris

We explore the chiral transmission of electrons across graphene heterojunctions for electronic switching using gate geometry alone. A sequence of gates is used to collimate and orthogonalize the chiral transmission lobes across multiple…

Mesoscale and Nanoscale Physics · Physics 2013-12-20 Redwan N. Sajjad , Avik W. Ghosh

The band structure of Bernal-stacked bilayer graphene can be tuned using double-gated transistors to apply a perpendicular electric field that generates an interlayer potential energy difference $\Delta$. Dielectric breakdown limits the…

Mesoscale and Nanoscale Physics · Physics 2026-01-28 Margherita Melegari , Brian Skinner , Ignacio Gutierrez-Lezama , Alberto F. Morpurgo

Graphene nanoribbons (GNRs) are promising components in future nanoelectronics due to the large mobility of graphene electrons and their tunable electronic band gap in combination with recent experimental developments of on-surface…

Mesoscale and Nanoscale Physics · Physics 2017-02-03 Pedro Brandimarte , Mads Engelund , Nick Papior , Aran Garcia-Lekue , Thomas Frederiksen , Daniel Sánchez-Portal

Superconductivity can be induced in a normal material via the leakage of superconducting pairs of charge carriers from an adjacent superconductor. This so-called proximity effect is markedly influenced by graphene unique electronic…

We study the transmission probability of Dirac fermions in graphene scattered by a triangular double barrier potential in the presence of an external magnetic field. Our system made of two triangular potential barrier regions separated by a…

Mesoscale and Nanoscale Physics · Physics 2022-11-09 Miloud Mekkaoui , Ahmed Jellal , Hocine Bahlouli

We have studied the behavior of the electronic energy spin-splitting of InGaAs-InAlAs based double quantum wells (narrow gap structures) under in-plane magnetic and transverse electric fields. We have developed an improved 8x8 version of…

Mesoscale and Nanoscale Physics · Physics 2013-10-30 A. Hernandez-Cabrera , P. Aceituno

By using four layered graphene/gallium nitride (GaN) Schottky diodes with an undoped GaN spacer, we demonstrate highly effective gating of graphene at low bias rendering this type of structure very promising for potential applications. An…

We investigate electron tunneling in AB bilayer graphene through a triple electrostatic barrier of heights $U_i (i=2,3,4)$ subjected to a perpendicular magnetic field. By way of the transfer matrix method and using the continuity conditions…

Mesoscale and Nanoscale Physics · Physics 2024-03-26 Mouhamadou Hassane Saley , Ahmed Jellal

Graphene in spintronics has so far primarily meant spin current leads of high performance because the intrinsic spin-orbit coupling of its pi-electrons is very weak. If a large spin-orbit coupling could be created by a proximity effect, the…

Materials Science · Physics 2013-05-14 D. Marchenko , A. Varykhalov , M. R. Scholz , G. Bihlmayer , E. I. Rashba , A. Rybkin , A. M. Shikin , O. Rader

Recently, the electronic analogy of the anomalous spatial shift, including Goos-H\"{a}nchen and Imbert-Fedorov effects, has been attracting widespread interest. The current research on the anomalous spatial shift in interface electronic…

Mesoscale and Nanoscale Physics · Physics 2022-12-15 Runze Li , Chaoxi Cui , Xinxing Zhou , Zhiming Yu

We present transport measurements on a bilayer graphene sheet with homogeneous back gate and split top gate. The electronic transport data indicates the capability to direct electron flow through graphene nanostructures purely defined by…

Mesoscale and Nanoscale Physics · Physics 2012-10-10 S. Dröscher , C. Barraud , K. Watanabe , T. Taniguchi , T. Ihn , K. Ensslin

Plasmons in van der Waals heterostructures comprised of graphene and related layered materials demonstrate deep subwavelength confinement and large propagation length. In this letter, we show that graphene-insulator-graphene tunnel…

Mesoscale and Nanoscale Physics · Physics 2016-09-14 Dmitry Svintsov , Zhanna Devizorova , Taiichi Otsuji , Victor Ryzhii

We consider a matter wave packet of cold atom gas impinging upon a step potential created by the optical light field. In the presence of spin-orbit (SO) coupling, the atomic eigenstates contain two types of evanescent states, one of which…

Quantum Gases · Physics 2015-03-25 Lu Zhou , Jie-Li Qin , Zhihao Lan , Guangjiong Dong , Weiping Zhang

Junctions composed of two crossed graphene nanoribbons (GNRs) have been theoretically proposed as electron beam splitters where incoming electron waves in one GNR can be split coherently into propagating waves in \emph{two} outgoing…

Mesoscale and Nanoscale Physics · Physics 2022-07-13 Sofia Sanz , Nick Papior , Géza Giedke , Daniel Sánchez-Portal , Mads Brandbyge , Thomas Frederiksen
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