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The conduction band electron states of laterally-coupled semiconductor quantum rings are studied within the frame of the effective mass envelope function theory. We consider the effect of axial and in-plane magnetic fields for several…

介观与纳米尺度物理 · 物理学 2015-06-25 J. Planelles , F. Rajadell , J. I. Climente , M. Royo , J. L. Movilla

Quantum wells constitute one of the most important classes of devices in the study of 2D systems. In a double layer QW, the additional "which-layer" degree of freedom gives rise to celebrated phenomena such as Coulomb drag, Hall drag and…

We studied a doping series of (110)-oriented AlAs quantum wells (QWs) and observed transport evidence of single anisotropic-mass valley occupancy for the electrons in a 150 \AA wide QW. Our calculations of strain and quantum confinement for…

介观与纳米尺度物理 · 物理学 2008-09-29 S. Dasgupta , S. Birner , C. Knaak , M. Bichler , A. Fontcuberta i Morral , G. Abstreiter , M. Grayson

Electron transport in nonideal quantum wells (QW) with large-scale variations of energy levels is studied when two subbands are occupied. Although the mean fluctuations of these two levels are screened by the in-plane redistribution of…

介观与纳米尺度物理 · 物理学 2009-10-31 O. G. Balev , F. T. Vasko , Flavio Aristone , Nelson Studart

We study a 2D mesoscopic ring with an anisotropic effective mass considering surface quantum confinement effects. Consider that the ring is defined on the surface of a cone, which can be controlled topologically and mapped to the 2D ring in…

介观与纳米尺度物理 · 物理学 2025-10-28 Francisco A. G. de Lira , Luís Fernando C. Pereira , Edilberto O. Silva

We have studied the band and optical properties of self-assembled quantum wires. In particular, the band structures and optical matrix elements of strained multiple quantum-wires (QWR's) are investigated theoretically via the effective…

介观与纳米尺度物理 · 物理学 2007-05-23 Liang-Xin Li

The spectrum of magnetic edge states and their transport properties in the presence of a perpendicular non-homogeneous magnetic field in a quantum wire formed by a parabolic confining potential are obtained. Systems are studied where the…

介观与纳米尺度物理 · 物理学 2010-08-03 S. M. Badalyan , F. M. Peeters

Electronic transport is theoretically investigated in laterally confined semiconductor superlattices using the formalism of non-equilibrium Green's functions. The transport properties are calculated for nanowire superlattices of varying…

介观与纳米尺度物理 · 物理学 2014-04-25 Thomas Grange

A comprehensive study of anisotropic quantum rings, QRs, subject to axial and in-plane magnetic field, both aligned and transverse to the anisotropy direction, is carried out. Elliptical QRs for a wide range of eccentricity values and also…

介观与纳米尺度物理 · 物理学 2007-05-23 J. Planelles , F. Rajadell , J. I. Climente

The authors report that anisotropic confining potentials in laterally-coupled semiconductor quantum dots (QDs) have large impacts in optical transitions and energies of inter-shell collective electronic excitations. The observed…

Thermal conductivity measurements can provide key and experimentally verifiable insight into the electronic transport of unconventional superconductors. In this work, electronic thermal transport of two-dimensional tight-binding metallic…

超导电性 · 物理学 2023-08-16 Sean F Peterson , Sourav Sen Choudhury , Yves Idzerda

We investigate the distribution of the electron density and the potential in a quantum wire coupled to reservoirs, treating this structure as a unified quantum system and taking into account the Coulomb interaction of electrons. The…

介观与纳米尺度物理 · 物理学 2009-10-31 V. A. Sablikov , S. V. Polyakov , M. Buttiker

We theoretically investigate the electron transport properties for a semiconductor quantum wire containing a single finite-size attractive impurity under an external terahertz electromagnetic field illumination in the ballistic limit.…

介观与纳米尺度物理 · 物理学 2009-11-11 Guanghui Zhou , Yuan Li , Fang Cheng , Wenfu Liao

We study an electron transport property in two parallel quantum wires with random potentials. Assuming the same microscopic parameters for both wires, we focus on the relationship between inter-wire interaction and electron backward…

介观与纳米尺度物理 · 物理学 2009-11-10 Yousuke Takeuchi , Hiroyuki Mori

We investigate theoretically the effects of the Coulomb interaction and spin-orbit interactions (SOIs) on the anisotropic transport property of semiconductor quantum wires embedded in (110) plane. The anisotropy of the dc conductivity can…

强关联电子 · 物理学 2009-11-03 Fang Cheng , Kai Chang

Electronic transport through a quantum wire sandwiched between two metallic electrodes and coupled to a quantum ring, threaded by a magnetic flux $\phi$, is studied. An analytic approach for the electron transport through the bridge system…

介观与纳米尺度物理 · 物理学 2009-11-06 Santanu K. Maiti

The electronic transport of a noninteracting quantum ring side-coupled to a quantum wire is studied via a single-band tunneling tight-binding Hamiltonian. We found that the system develops an oscillating band with antiresonances and…

介观与纳米尺度物理 · 物理学 2009-11-10 P. A. Orellana , M. L. Ladron de Guevara , M. Pacheco , A. Latge

In this communication, we numerically studied disordered quantum transport in a quantum anomalous Hall insulator-superconductor junction based on the effective edge model approach. In particular, we focus on the parameter regime with the…

超导电性 · 物理学 2020-10-21 Jian-Xiao Zhang , Chao-Xing Liu

Tungsten diselenide, WSe2 shows excellent properties and become very promising material among two dimensional semiconductors. Wide band gap and large spin-orbit coupling along with naturally lacking inversion symmetry in the monolayer WSe2…

材料科学 · 物理学 2023-10-16 S. Gupta , R. Ohshima , Y. Ando , T. Endo , Y. Miyata , M. Shiraishi

A one-dimensional, two-channel quantum wire is studied in the effective non-Hermitian Hamiltonian framework. Analytical expressions are derived for the band structure of the isolated wire. Quantum states and transport properties of the wire…

介观与纳米尺度物理 · 物理学 2016-01-27 Amin Tayebi , Vladimir Zelevinsky
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