作者: 衍生 時間: 2025-3-21 20:36 作者: 直覺沒有 時間: 2025-3-22 02:24 作者: negligence 時間: 2025-3-22 05:54 作者: 瑪瑙 時間: 2025-3-22 12:44 作者: evince 時間: 2025-3-22 16:51
Network Models of the Quantum Hall Effectfermi level for every Landau level below e. due to the presence of edges (which break the Landau level degeneracy), and typically .-1 of these states actually carry current along the edge. The .-matrix approach assumes the validity of the independent electron approximation and provides a physically 作者: evince 時間: 2025-3-22 18:53
Approaches to Quantum Transport in Semiconductor Nanostructures作者: 龍卷風 時間: 2025-3-23 01:07 作者: Solace 時間: 2025-3-23 02:20 作者: 永久 時間: 2025-3-23 05:42
Knowledge Driven Capitalization of Knowledgeility and easy tunability of carrier density. Presently the lateral modulation of the band structure is commonly achieved by a periodic potential modulation which modulates the carrier density of the electron system but essentially preserves the uniformity of the bandgap in the surface plane. The ef作者: Sigmoidoscopy 時間: 2025-3-23 11:22
Marlene Morrison,Sheila Gallowayort (the charge carriers experience no, or only few, collisions within the active region of the device); here we point out the difference between quantum ballistic transport, such as underlies resistance quantization in quantum point contacts (van Wees ., 1988; Wharam ., 1988) and ballistic peaks ob作者: disparage 時間: 2025-3-23 14:30
https://doi.org/10.1007/978-3-658-11994-2 additional magnetic field can be analyzed analytically. It was shown (Berggren ., 1986), that the additional magnetic field increases the ID subband spacing, so that lD-subbands are shifted above the Fermi energy if the magnetic field is increased. Consequently, these subbands are depopulated, resu作者: CROW 時間: 2025-3-23 20:28
Analysis of Interactions in Research,fermi level for every Landau level below e. due to the presence of edges (which break the Landau level degeneracy), and typically .-1 of these states actually carry current along the edge. The .-matrix approach assumes the validity of the independent electron approximation and provides a physically 作者: 嘴唇可修剪 時間: 2025-3-23 23:23 作者: TAG 時間: 2025-3-24 04:46
Non-Equilibrium Carrier Transport in Small Structures, which makes it difficult to establish a proper guideline for designing small geometry devices. Especially, detailed understanding of high-field effects in future deep submicron devices strongly requires a precise knowledge on non-equilibrium carrier transport.作者: ANNUL 時間: 2025-3-24 08:01 作者: 主講人 時間: 2025-3-24 12:10
Vicky Johnson,Roger Hart,Jennifer Colwellcan be made in which the dimensions can be reduced to a one-dimensional quantum wire — wherein the electronic states are quantized perpendicular to the wire (in both directions) and ., the wave vector, is a good quantum number only along the wire (Warren ., 1986; Kotthaus ., 1988; Berggren ., 1986; Smith ., 1987).作者: correspondent 時間: 2025-3-24 17:04
Laura Camfield (Senior Lecturer)ning potentials. One method for creating these systems is the electrostatic confinement of an existing 2DEG. Unfortunately, electronic transport that reveals quantum size effects in these systems only occurs for low temperatures (<1 .) and voltages near equilibrium (typically of the mV level) (Williamson .., 1990).作者: drusen 時間: 2025-3-24 19:19 作者: 放逐 時間: 2025-3-25 02:48 作者: oncologist 時間: 2025-3-25 04:17 作者: voluble 時間: 2025-3-25 11:34 作者: expository 時間: 2025-3-25 13:15
An Introduction to Charge Quantum Transport in Semiconductors and Numerical Approaches, even though the main theoretical concepts and methods of quantum transport have been developed long ago, they hardly yielded any numerical result to compare with experimental data, owing to the complexity of the mathematics involved and to the lack of clear experimental evidences.作者: Ischemic-Stroke 時間: 2025-3-25 16:55 作者: 都相信我的話 時間: 2025-3-25 20:19
Non-Equilibrium Quantum Dot Transportning potentials. One method for creating these systems is the electrostatic confinement of an existing 2DEG. Unfortunately, electronic transport that reveals quantum size effects in these systems only occurs for low temperatures (<1 .) and voltages near equilibrium (typically of the mV level) (Williamson .., 1990).作者: Heresy 時間: 2025-3-26 04:00 作者: aquatic 時間: 2025-3-26 05:32
Thermal and Shot Noise in Open Conductorsach. The fluctuation dissipation theorem relates the current or voltage fluctuations at equilibrium to linear response transport coefficients. I also discuss the fluctuations of current and voltage away from the average value in the presence of transport. I illustrate these results by discussing conductors which exhibit the quantized Hall effect.作者: Folklore 時間: 2025-3-26 10:58 作者: 乳白光 時間: 2025-3-26 15:48
Microwave Studies of Quasi-One Dimensional Wiresxperiments on heterostructure quantum wires the influence of a microwave field on the weak electron localization (WEL) and the universal conductance fluctuations (UCF) was studied (Kuchar ., 1989, 1990).作者: narcotic 時間: 2025-3-26 17:50 作者: Lineage 時間: 2025-3-26 23:08
Ove Edvard Hatlevik,Gunstein EgebergIn this chapter, I will talk about the limits to nanofabrication, the technology (or art) of making structures whose size is best measured in nanometres rather than microns, and the application of conventional nanofabrication to studying the optical properties of quantum wires and dots.作者: Lipoprotein(A) 時間: 2025-3-27 02:11 作者: certitude 時間: 2025-3-27 07:36 作者: 指數(shù) 時間: 2025-3-27 10:12 作者: epicondylitis 時間: 2025-3-27 15:45
Methodologie der Sozialwissenschaften at best a tenuous link between the two topics. Now I feel that there is a fundamental connection, and that it is absolutely essential to understand what we mean by “dephasing” before we can assess many of the results obtained in the last few years on charge quantization and related effects.作者: 喃喃而言 時間: 2025-3-27 20:46
Monte Carlo Algorithms for Quantum Transportproach based on the semi-classical (SC) Boltzmann equation. Indeed, quantum theory has indicated that a proper treatment of high-field transport in semiconductors should include the intra-collisional field effect (ICFE) as well as collisional broadening (CB) (for a review see Reggiani, 1985).作者: 痛打 時間: 2025-3-28 00:38 作者: GIDDY 時間: 2025-3-28 02:05 作者: Tinea-Capitis 時間: 2025-3-28 09:20 作者: Allege 時間: 2025-3-28 14:15
Understanding and Planning Emotions Researche conducting electrons to narrow channels which have dimensions comparable to or smaller than the inelastic coherence length at an appropriate temperature. The most interesting devices possess some feature sizes commensurate with the de Broglie wavelength. Examples of such structures include quantum作者: AWL 時間: 2025-3-28 15:22 作者: 暫時別動 時間: 2025-3-28 20:40
Vicky Johnson,Roger Hart,Jennifer Colwellate ballistically until reflected by some sort of a boundary — either the sample edge or some other introduced sharp fluctuation in the potential. In the GaAs/GaAlAs heterojunction systems, it is relatively easy to attain mobilities high enough so that mean free paths are micometers or more. It is a作者: 清澈 時間: 2025-3-28 23:31
Laura Camfield (Senior Lecturer)inrich ., 1988; Reed and Kirk, 1989). Structures such as electron waveguides and quantum point contacts are excellent laboratories to study fundamentals of electronic transport in the quantum ballistic regime. The creation of 3-dimensionally confined systems (“quantum dots”) (Hansen ., 1990; Reed .,作者: custody 時間: 2025-3-29 04:49 作者: Blood-Vessels 時間: 2025-3-29 08:34
https://doi.org/10.1007/978-3-642-24743-9ffects become more pronounced, which are velocity saturation, non-stationary transport (ballistic transport and velocity overshoot), impact ionization, and hot-carrier induced degradation of devices. However, many fundamental problems on non-equilibrium carrier transport still remain to be clarified作者: 怎樣才咆哮 時間: 2025-3-29 13:07
Marlene Morrison,Sheila Gallowayations, such as the drift-diffusion equation). Powerful Monte Carlo techniques have been developed to solve the BE (for a review see e.g. Jacoboni and Reggiani, 1983), and combined with Poisson equation solvers these methods form the basis for the theoretical analysis and design of modern semiconduc作者: erythema 時間: 2025-3-29 16:44 作者: 整潔漂亮 時間: 2025-3-29 23:12 作者: Obloquy 時間: 2025-3-30 00:52
Problems of Political Theory and Action and add corrections which take account of various aspects of transport not included in this simple expression (see Fig. 1). For instance, disorder induced corrections arise from quantum interference and electron-electron interaction, generally lowering the conductivity. The interference arises beca作者: DRILL 時間: 2025-3-30 06:05
Michael Jonas,Beate Littig,Angela Wroblewskie of carriers via a number of contacts. In many cases an explicit description of the contact properties is crucial for making contact with experimental reality. A theory of electrical conductance which is capable of treating contacts is the transmission approach. The transmission approach relates th作者: chemical-peel 時間: 2025-3-30 09:31
Analysis of Interactions in Research,ived enormous attention both from the experimental and theoretical point of view (Prange and Girvin, 1987). Although many aspects of the effect are now understood based on this work, the actual transport theory of the effect, particularly in the transition regions between quantized plateaus, has rem作者: 事先無準備 時間: 2025-3-30 13:40
Methodologie der Sozialwissenschaften pass through different paths would interfere with each other and the quantum interference would play an important role in electron transport. This quantum interference effect of electron waves has been of great interest in solid state physics (Umbach ., 1984; Shervin ., 1981; Webb ., 1985; Al’tshul作者: paradigm 時間: 2025-3-30 19:40
,Erkl?rung, Voraussage und Verstehen,86; Heinrich ., 1988). The use of high-frequency electric fields, however, is of particular interest if the product ωτ? ～ 1, where 1/τ? is the phase-breaking rate which determines the phase coherence of the wave function (Altshuler ., 1981; Khmelnitskii, 1988). In quantum wires, high-frequency effec作者: 小畫像 時間: 2025-3-30 21:53
Sozialwissenschaften und soziale Praxis,evice of length .. Under stationary conditions, the basic quantities of interest are the current spectral density, ..(ω), and the correlation function of the instantaneous total current fluctuation, ..(.).作者: 壓迫 時間: 2025-3-31 03:29 作者: habile 時間: 2025-3-31 07:51 作者: 不吉祥的女人 時間: 2025-3-31 09:49 作者: BLOT 時間: 2025-3-31 15:36 作者: GLOOM 時間: 2025-3-31 18:37
Interference Devicesate ballistically until reflected by some sort of a boundary — either the sample edge or some other introduced sharp fluctuation in the potential. In the GaAs/GaAlAs heterojunction systems, it is relatively easy to attain mobilities high enough so that mean free paths are micometers or more. It is a作者: Libido 時間: 2025-4-1 01:00 作者: BOGUS 時間: 2025-4-1 03:19
Field-Effect Controlled Surface Superlatticesnology. Usually such superlattices consist of alternating layers of semiconductor material with different composition or dopant concentration and are grown epitaxially. With increasing refinement of lithographic tools it has become possible in recent years to also create artificial surface superlatt作者: crease 時間: 2025-4-1 08:26 作者: 船員 時間: 2025-4-1 10:34
Nonequilibrium Green Function Techniques Applied to Hot-Electron Quantum Transportations, such as the drift-diffusion equation). Powerful Monte Carlo techniques have been developed to solve the BE (for a review see e.g. Jacoboni and Reggiani, 1983), and combined with Poisson equation solvers these methods form the basis for the theoretical analysis and design of modern semiconduc作者: 果仁 時間: 2025-4-1 17:34 作者: foppish 時間: 2025-4-1 19:20
Tunneling Between Constrained Dimensionality Systemsl electron gas can be constrained to a thin stripe (“quantum wire”) by etching processes or electrostatic confinement. This confinement results in an additional set of quantized states. The knowledge of these one dimensional (ID) subband energies is one of the basic requirements to understand the ph
