Weak localization in semiconductor quantum wires

1992 ◽  
Vol 46 (4) ◽  
pp. 2400-2411 ◽  
Author(s):  
M. Suhrke ◽  
S. Wilke
Keyword(s):  
Quantum Wires ◽  
Weak Localization

Weak localization and spin-orbit interaction in self-organized In0.2Ga0.8As quantum wires on GaAs (221)A substrates

2005 ◽  
Vol 2 (8) ◽  
pp. 3072-3076
Author(s):  
S. Ishida ◽  
K. Takeda ◽  
H. Tokumon ◽  
S. Shimomura ◽  
S. Hiyamizu
Keyword(s):  
Quantum Wires ◽  
Weak Localization ◽  
Orbit Interaction ◽  
Spin Orbit ◽  
Spin Orbit Interaction ◽  
Self Organized

Condensed matter physics

2018 ◽  
Author(s):  
Yan Fyodorov ◽  
Dmitry Savin
Keyword(s):  
Quantum Dots ◽  
Shot Noise ◽  
Matrix Theory ◽  
Quantum Wires ◽  
Condensed Matter ◽  
Weak Localization ◽  
Scattering Matrix ◽  
Condensed Matter Physics ◽  
Conductance Fluctuations ◽  
Non Gaussian

This article discusses some applications of concepts from random matrix theory (RMT) to condensed matter physics, with emphasis on phenomena, predicted or explained by RMT, that have actually been observed in experiments on quantum wires and quantum dots. These observations range from universal conductance fluctuations (UCF) to weak localization, non-Gaussian thermopower distributions, and sub-Poissonian shot noise. The article first considers the UCF phenomenon, nonlogarithmic eigenvalue repulsion, and sub-Poissonian shot noise in quantum wires before analysing level and wave function statistics, scattering matrix ensembles, conductance distribution, and thermopower distribution in quantum dots. It also examines the effects (not yet observed) of superconductors on the statistics of the Hamiltonian and scattering matrix.

Weak localization in laterally coupled quantum wires

2003 ◽  
Vol 67 (19) ◽  
Author(s):  
O. Bierwagen ◽  
C. Walther ◽  
W. T. Masselink ◽  
K.-J. Friedland
Keyword(s):  
Quantum Wires ◽  
Weak Localization

HIGH DENSITY EXCITATION EFFECTS ON EXCITONS AND ELECTRON-HOLE PAIRS IN AlxGa1-xAs/AlAs QUANTUM WIRES

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3757-3760
Author(s):  
K. BANDO ◽  
I. AKAI ◽  
T. KARASAWA ◽  
K. INOUE ◽  
H. NAKASHIMA
Keyword(s):  
Radiative Decay ◽  
Quantum Wires ◽  
Weak Localization ◽  
High Density ◽  
Excitation Density ◽  
Type I ◽  
Type Ii ◽  
Large Shift ◽  
Density Effects ◽  
The Difference

High density excitation effects on excitons in Al x Ga 1-x As/AlAs (x=0.2~0.5) quantum wires (QWRs) have been investigated. In these samples, the difference between the type-I (x≤0.3) and type-II (x≥0.4) band structures was clearly observed in high density effects on the photoluminescence (PL) and its temporal response. In the type-I samples, the PL is characterized by a fast radiative decay process reflecting intra-wire transitions. The PL peak shows a small blueshift with increasing excitation density, and the shift becomes large to 20meV under the highest excitation limit. The large shift is ascribed to intrinsic high density excitation effects appearing beyond the weak localization of the excitons ito structural fluctuations. On the other hand, in the type-II PL, a huge blueshift appears, being much larger than the localization energies of the excitons. This shift is also considered to be due to another intrinsic high-density effects brought about by the long-lived type-II excitons.

Ballistic Weak Localization and Wave Function Scarring in Quantum Wires

1998 ◽  
Vol 37 (Part 1, No. 3B) ◽  
pp. 1657-1659
Author(s):  
Yuichi Ochiai ◽  
Li-hung Lin ◽  
Kazunuki Yamamoto ◽  
Jonathan P. Bird ◽  
Koji Ishibashi ◽  
...  
Keyword(s):  
Wave Function ◽  
Quantum Wires ◽  
Weak Localization
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