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We present a new approach of back gate patterning that is compatible with the requirements of highest mobility molecular beam epitaxy. Contrary to common back gating techniques, our method is simple, reliable and can be scaled up for entire…

介观与纳米尺度物理 · 物理学 2016-04-20 Matthias Berl , Lars Tiemann , Werner Dietsche , Helmut Karl , Werner Wegscheider

Myoglobin single-electron transistors were investigated using nanometer- gap platinum electrodes fabricated by electromigration at cryogenic temperatures. Apomyoglobin (myoglobin without heme group) was used as a reference. The results…

介观与纳米尺度物理 · 物理学 2013-12-16 Debin Li , Peter M. Gannet , David Lederman

We identify an intriguing feature of the electron-vibrational dynamics of molecular systems via a computational examination of \emph{trans}-polyacetylene oligomers. Here, via the vibronic interactions, the decay of an electron in the…

量子物理 · 物理学 2013-04-09 Ignacio Franco , Angel Rubio , Paul Brumer

We report the synthesis and characterization of molecular rectifying diodes on silicon using sequential grafting of self-assembled monolayers of alkyl chains bearing a pi group at their outer end (Si/sigma-pi/metal junctions). We…

In a topological insulator (TI) the character of electron transport varies from insulating in the interior of the material to metallic near its surface. Unlike, however, ordinary metals, conducting surface states in TIs are topologically…

介观与纳米尺度物理 · 物理学 2013-02-08 G. Tkachov , E. M. Hankiewicz

The kinetics of the charge carrier recombination in dye molecule-doped multilayer organic light-emitting diodes (OLEDs) was quantified by transient electroluminescence (EL). Three sets of dye molecules, such as derivatives of naphthalimide…

材料科学 · 物理学 2014-11-13 Shengwei Shi , Feng Gao , Zhengyi Sun , Yiqiang Zhan , Mats Fahlman , Dongge Ma

We demonstrate the possibility of designing efficient, non reciprocal few-photon devices by exploiting the chiral coupling between two waveguide modes and a single quantum emitter. We show how this system can induce non-reciprocal photon…

量子物理 · 物理学 2016-12-14 C. Gonzalez-Ballestero , Esteban Moreno , F. J. Garcia-Vidal , A. Gonzalez-Tudela

We study the temperature dependence of the conductivity of the 2D electronic solid. In realistic samples, a domain structure forms in the solid and each domain randomly orients in the absence of the in-plane field. At higher temperature,…

介观与纳米尺度物理 · 物理学 2009-11-10 Shi-Jie Yang , Yue Yu

We show theoretically that the strong interaction of a two-dimensional electron gas (2DEG) with a dressing electromagnetic field drastically changes its transport properties. Particularly, the dressing field leads to the giant increase of…

介观与纳米尺度物理 · 物理学 2015-05-04 S. Morina , O. V. Kibis , A. A. Pervishko , I. A. Shelykh

We have investigated the electron mobility on field-effect transistors based on PDIF-CN$_{2}$ single crystals. The family of the small molecules PDI8-CN$_{2}$ has been chosen for the promising results obtained for vapour-deposited thin film…

材料科学 · 物理学 2009-02-06 Anna S. Molinari , Helena Alves , Zhihua Chen , Antonio Facchetti , Alberto F. Morpurgo

Single-layer transition metal dichalcogenide (TMD) WSe2 has recently attracted a lot of attention because it is a 2D semiconductor with a direct band-gap. Due to low doping levels it is intrinsic and shows ambipolar transport. This opens up…

介观与纳米尺度物理 · 物理学 2014-07-18 Adrien Allain , Andras Kis

We report electrical conductivity $\sigma$ measurements on a range of two-dimensional electron gases (2DEGs) of varying linear extent. Intriguingly, at low temperatures ($T$) and low carrier density ($n_{\mathrm{s}}$) we find the behavior…

介观与纳米尺度物理 · 物理学 2016-05-25 Dirk Backes , Richard Hall , Michael Pepper , Harvey Beere , David Ritchie , Vijay Narayan

We theoretically propose a novel spin-dependent electronic transport mechanism in which the spin-unpolarized electron beam is split into different directions depending on spins at an atomic domain boundary in non-magnetic material.…

介观与纳米尺度物理 · 物理学 2015-05-27 Tetsuro Habe , Mikito Koshino

We investigate ballistic spin transport in a two dimensional electron gas system through magnetic barriers of various geometries using the transfer matrix method. While most of the previous studies have focused on the effect of magnetic…

介观与纳米尺度物理 · 物理学 2015-06-18 Nammee Kim , Heesang Kim

Two-dimensional materials offer a novel platform for the development of future quantum technologies. However, the electrical characterisation of topological insulating states, non-local resistance and bandgap tuning in atomically-thin…

Polar discontinuities occurring at interfaces between two different materials constitute both a challenge and an opportunity in the study and application of a variety of devices. In order to cure the large electric field occurring in such…

We study transport across a time-dependent magnetic barrier present on the surface of a three-dimensional topological insulator. We show that such a barrier can be implemented for Dirac electrons on the surface of a three-dimensional…

介观与纳米尺度物理 · 物理学 2020-07-29 Adithi Udupa , K. Sengupta , Diptiman Sen

We analyze the transport properties of a double quantum dot device in the side-coupled configuration. A small quantum dot (QD), having a single relevant electronic level, is coupled to source and drain electrodes. A larger QD, whose…

介观与纳米尺度物理 · 物理学 2014-03-12 J. A. Andrade , Pablo S. Cornaglia , A. A. Aligia

Topological Insulator-based devices can transport electrons/photons at the surfaces of materials without any back reflections, even in the presence of obstacles. Topological properties have recently been studied using non-reciprocal…

光学 · 物理学 2016-11-03 Babak Bahari , Ricardo Tellez-Limon , Boubacar Kanté

We study the quantum electron transport in a one-dimensional interacting electron system, called Schmid model, reformulating the model in terms of the bosonic string theory on a disk. The particle-kink duality of the model is discussed in…

高能物理 - 理论 · 物理学 2015-09-02 Taejin Lee
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