نتایج جستجو برای: single electron tunneling

تعداد نتایج: 1162844  

Journal: :Physical review. B, Condensed matter 1996
Zheng Das Sarma S

Motivated by a recent tunneling experiment in a double quantum-well system, which reports an anomalously enhanced electronic scattering rate in a clean two-dimensional electron gas, we calculate the inelastic quasiparticle lifetime due to electron-electron interaction in a single loop dynamically screened Coulomb interaction within the random-phase-approximation. We obtain excellent quantitativ...

2013
A. N. Chaika S. S. Nazin V. N. Semenov N. N Orlova S. I. Bozhko O. Lübben S. A. Krasnikov K. Radican I. V. Shvets

Precise knowledge of the atomic and electronic structure of scanning tunneling microscopy (STM) tips is crucial for correct interpretation of atomically resolved STM data and improvement of spatial resolution. Here we demonstrate that tungsten probes with controllable electronic structure can be fabricated using oriented single crystalline tips. High quality of the [001]-oriented W tips sharpen...

2000
Jason R. Petta D. G. Salinas D. C. Ralph

We present results from nanometer-scale tunnel junctions fabricated using organic self-assembled monolayers ~SAMs! as tunnel barriers. Single junctions have resistances consistent with tunneling through a single layer of molecules. In several devices, a gold nanoparticle nucleated within the SAM barrier. Such samples allow a sensitive test of mechanical stability—some are sufficiently stable to...

1998
Arne Brataas Gerrit E.W. Bauer

We study transport in ferromagnetic single-electron transistors. The non-equilibrium spin accumulation on the island caused by a finite current through the system is described by a generalized theory of the Coulomb blockade. It enhances the tunnel magnetoresistance and has a drastic effect on the time-dependent transport properties. A transient decay of the spin accumulation may reverse the ele...

2012
Tomoaki Nishino Phuc Tan Bui

Understanding electron transport through a single molecule is of fundamental importance for molecular electronics. Recently, there have been significant advances in the measurement of electron transport through a single molecule [1]. One of the next challenges toward the realization of molecular electronic devices lies in measuring electron transport between single molecules interacting with ea...

2001
J. P. Kotthaus

Efforts are made in this thesis to reveal the dynamics of single-electron tunneling and to realize quantum bits (qubits) in semiconductor quantum dots. At low temperatures, confined single quantum dots and double quantum dots are realized in the twodimensional electron gas (2DEG) of AlGaAs/GaAs heterostructures. For transport studies, quantum dots are coupled to the drain and source contacts vi...

1998
Alexander N. Korotkov Konstantin K. Likharev

We analyze the operation of the wireless single-electron logic family based on single-electron-parametron cells. Parameter margins, energy dissipation, and the error probability are calculated using the orthodox theory of single-electron tunneling. Circuits of this family enable quasireversible computation with energy dissipation per bit much lower than the thermal energy, and hence may circumv...

1999
H. B. Chan R. C. Ashoori L. N. Pfeiffer K. W. West

We explore the characteristics of equilibrium tunneling of electrons from a 3D electrode into a high mobility 2D electron system. For most noninteger filling factors, we find that tunneling can be characterized by a single, well-defined tunneling rate. However, for spin-polarized quantum Hall states (n 1, 3, and 1 3) tunneling occurs at two distinct rates that differ by up to 2 orders of magnit...

1998
T. Barabash M. I. Dykman P. M. Platzman V. N. Smelyanskiy

We analyze single-electron tunneling from the bound state above the surface of liquid helium. For strong enough magnetic fields parallel to the surface, the tunneling must be accompanied by ripplon scattering. The effective width of the tunneling barrier strongly and nonmonotonically depends on the momentum transferred to ripplons. The escape rate is affected by Landau quantization of the state...

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