Photoabsorption oscillations in semiconductors with sharply anisotropic effective mass of electrons in quantizing magnetic fields

Laser Physics ◽  
2011 ◽  
Vol 21 (4) ◽  
pp. 761-768
Author(s):  
S. P. Andreev ◽  
T. V. Pavlova
Keyword(s):  
Magnetic Fields ◽  
Effective Mass

Photoconductivité dans l'alliage GaAsxSb1−x en présence d'un champ magnétique

1974 ◽  
Vol 52 (8) ◽  
pp. 743-747 ◽  
Author(s):  
A. Filion ◽  
E. Fortin
Keyword(s):  
Magnetic Fields ◽  
Band Gap ◽  
Effective Mass ◽  
Alloy Composition ◽  
Longitudinal Optical ◽  
Optical Phonons ◽  
Champ Magnétique

The intrinsic photoconductivity of several samples of the alloy GaAsxSb1−x has been studied at 4.2 K in the presence of magnetic fields of up to 65 kG. Values for the band-gap, the reduced effective mass of the carriers, the energy of the longitudinal optical phonons across the alloy composition are deduced from the measurements.

scholarly journals Enhancement of the effective mass at high magnetic fields in CeRhIn5

2019 ◽  
Vol 99 (4) ◽  
Author(s):  
L. Jiao ◽  
M. Smidman ◽  
Y. Kohama ◽  
Z. S. Wang ◽  
D. Graf ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Effective Mass ◽  
High Magnetic Fields

Magneto-Spectroscopy of Two-Electron Transitions in Homoepitaxial GaN.

2001 ◽  
Vol 693 ◽  
Author(s):  
M. Wojdak ◽  
J.M. Baranowski ◽  
A. Wysmolck ◽  
K. Pakula ◽  
R. Stepnicwski ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Excited State ◽  
Magnetic Fields ◽  
Effective Mass ◽  
Electron Energy ◽  
Electron Transition ◽  
Electron Effective Mass ◽  
Neutral Donor ◽  
Electron Transitions ◽  
The Difference

AbstractTwo-electron transition occurs when the exciton bound to a neutral donor (DBE) recombines and leaves the donor in an excited state. The two-electron energy is therefore lower than that of the DBE peak by the difference in ground and excited state of the neutral donor. In a magnetic field the two-electron satellite splits into several components. These intra-donor excitations have been studied in homoepitaxial GaN up to magnetic fields reaching 23T. For Faraday (B‖c) configuration the two-electron transition splits mainly into 2s, 2p0, 2p+ and 2p- components. The total splitting between 2p+ and 2p- is equal to Landau energy. For Voigt (B???c) configuration in addition to transition to 2s, 2p0, 2p- and 2p+ there are additional lines which origin is discussed. It has been found that for two configurations of magnetic field the separation between 2p+ and 2p- is not exactly equal, what indicates the anisotropy of the electron effective mass. It has been found that m| = 0.205m0 and m??? = 0.225m0.

Cyclotron effective mass and Landé g factor in GaAs–Ga1−xAlxAs quantum wells under growth-direction applied magnetic fields

2006 ◽  
Vol 99 (10) ◽  
pp. 104303 ◽  
Author(s):  
M. de Dios-Leyva ◽  
N. Porras-Montenegro ◽  
H. S. Brandi ◽  
L. E. Oliveira
Keyword(s):  
Magnetic Fields ◽  
Quantum Wells ◽  
Effective Mass ◽  
Growth Direction ◽  
G Factor

Nernst–Ettingshausen Effects in GaxIn1–xAs alloys

1973 ◽  
Vol 51 (22) ◽  
pp. 2369-2375 ◽  
Author(s):  
Denis J. E. Demars ◽  
John C. Woolley
Keyword(s):  
Experimental Data ◽  
Magnetic Fields ◽  
Effective Mass ◽  
Room Temperature ◽  
Optical Scattering ◽  
Temperature Measurements ◽  
Scattering Coefficient ◽  
Alloy Sample ◽  
Alloy Scattering ◽  
Good Agreement

Room temperature measurements of longitudinal and transverse Nernst–Ettingshausen coefficients [Formula: see text] have been made on samples of GaxIn1–xAs alloys for a range of magnetic fields (B) up to 3.2 Wb/m2. Previous theoretical expressions for the values of these coefficients have been extended to the case of electrons in a single Kane band, and hence expressions for [Formula: see text] and [Formula: see text] obtained in terms of B, the bottom of the band effective mass m0*, and the scattering coefficient s. Fitting of these expressions to the experimental data thus has given values of m0* and s for each alloy sample. The values of m0* are found to be in good agreement with those obtained previously from plasma reflectance work, while the values of s indicate that over most of the alloy range polar optical scattering is predominant, but that in the range 0.4 < x < 0.7, alloy scattering may also have some contribution.

On the Theory of Conductivity of an Electronic Gas with Anisotropic Effective Mass in Quantizing Magnetic Fields

1975 ◽  
Vol 71 (1) ◽  
pp. 359-367 ◽  
Author(s):  
P. I. Bakanskii ◽  
L. S. Demidenko ◽  
S. L. Korolyuk ◽  
A. G. Samoilovich
Keyword(s):  
Magnetic Fields ◽  
Effective Mass

MAGNETOPHONON RESONANCE IN MnxCdyHg1-x-yTe

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1615-1620
Author(s):  
D. PLOCH ◽  
J. CEBULSKI ◽  
E. M. SHEREGII
Keyword(s):  
Magnetic Fields ◽  
Band Structure ◽  
Effective Mass ◽  
Structure Parameters ◽  
Pulsed Magnetic Fields ◽  
Kane Model ◽  
Two Samples ◽  
Different Temperatures ◽  
Magnetophonon Resonance ◽  
Resonance Curves

The aim of this work is to analyze the band-structure parameters of Mn x Cd y Hg 1- x - y Te (MMCT) alloys by means of Magnetophonon Resonance (MPR) and to compare that obtained for Zn x Cd y Hg 1- x - y Te (ZMCT). MPR was observed for two samples of Mn x Cd y Hg 1- x - y Te (MMCT) (I- x =0.095 and y =0.09, II-0.04 and y =0.19). The measurements of MPR were performed in pulsed magnetic fields at different temperatures ranging from 77 K to 200 K. The several wide maxima are clearly visible on the experimental curves corresponding to four series of peaks. These series are related to three kinds of phonons analogous to ZMCT. The system of MPR peaks in MMCT is shifted significantly to the higher magnetic fields in comparison with the ZMCT resonance curves of approximately the same content of Zn . The value of effective mass obtained by MPR experiment is of 66% greater than those calculated in the framework of three-band Kane model, in which the value of Eg, was extracted from the photoconductivity data.

Effective Mass Theory of Carbon Nanotubes with Vacancies in Magnetic Fields

2001 ◽  
Vol 70 (2) ◽  
pp. 481-491 ◽  
Author(s):  
Masatsura Igami ◽  
Takeshi Nakanishi ◽  
Tsuneya Ando
Keyword(s):  
Carbon Nanotubes ◽  
Magnetic Fields ◽  
Effective Mass

NONLINEAR CURRENT DENSITY IN QUANTUM WELLS WITH PARABOLIC POTENTIAL UNDER CROSSED ELECTRIC AND MAGNETIC FIELDS

2012 ◽  
Vol 01 (02) ◽  
pp. 1250021
Author(s):  
BUI DINH HOI ◽  
TRAN CONG PHONG
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Electric Field ◽  
Quantum Wells ◽  
Effective Mass ◽  
Current Density ◽  
Electrical Transport ◽  
Physical Parameters ◽  
Electric And Magnetic Fields ◽  
Dc Electric Field

The DC electrical transport in a quantum well (QW) with parabolic confinement potential [Formula: see text] (where m and ωz are the effective mass of electron and the confinement frequency in z direction, respectively) subjected to a crossed DC electric field and magnetic field, is studied theoretically. The scattering by optical phonons is taken into account at high temperatures and strong magnetic fields. We obtained the expression for nonlinear current density (NCD) involving external (electric and magnetic) fields and characteristic parameters of QW. The dependence of NCD on the DC electric field is complicated. The analytical result is computationally evaluated and graphically plotted for a specific parabolic QW of GaAs / AlGaAs . The numerical results show the appearance of maximum peaks satisfying the condition of intersubband magnetophonon resonance (MPR) effect in the presence of a DC electric field. Especially, we show that the effect can be applied in experiment to determine some physical parameters by using magnetic field, such as the numbers of Landau levels for which electrons transfer, the effective mass, the charge of electrons or the confinement frequency characterized for PQW.

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