Donor transition energy in GaAs superlattices in a magnetic field along the growth axis

1991 ◽  
Vol 44 (11) ◽  
pp. 5692-5702 ◽  
Author(s):  
J. M. Shi ◽  
F. M. Peeters ◽  
G. Q. Hai ◽  
J. T. Devreese
Keyword(s):  
Magnetic Field ◽  
Transition Energy ◽  
Growth Axis

Erratum: Donor transition energy in GaAs superlattices in a magnetic field along the growth axis

1993 ◽  
Vol 48 (7) ◽  
pp. 4978-4978 ◽  
Author(s):  
J. M. Shi ◽  
F. M. Peeters ◽  
G. Q. Hai ◽  
J. T. Devreese
Keyword(s):  
Magnetic Field ◽  
Transition Energy ◽  
Growth Axis

Manifestation of the Spin in the Isotope Effects

2015 ◽  
Vol 1084 ◽  
pp. 147-151
Author(s):  
Vladimir G. Plekhanov ◽  
Vyacheslav F. Myshkin ◽  
Valery A. Khan ◽  
Dmitry A. Izhoykin
Keyword(s):  
Magnetic Field ◽  
Transition Energy ◽  
Isotope Effects ◽  
Shallow Donor ◽  
Photoluminescence Excitation ◽  
Isotope Substitution ◽  
Fundamental Properties ◽  
Atomic Nuclei ◽  
Modern Physics ◽  
Band Transition

Modern physics distinguishes three fundamental properties of atomic nuclei: mass; spin and related magnetic moment; volume (surrounding field strength), which are the source of isotope effects. The experiments showed that the isotope substitution of the light isotope with the hard one increased the band-to-band transition energy Eg, as well as the exciton binding energy Ebboth in semiconductors and insulators. The representative manifestation of the spin has been observed in photoluminescence excitation spectroscopy in highly enriched28Si crystals with shallow donor P, as well as in the separation of13C and12С isotope in magnetic field.

D− Impurities in a Quasi-Two-Dimensional System: Statistics and Screening

1993 ◽  
Vol 325 ◽  
Author(s):  
W. J. Li ◽  
J. L. Wang ◽  
J.-P. Cheng ◽  
S. Holmes ◽  
Y. J. Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Wells ◽  
Electron Density ◽  
Transition Energy ◽  
Far Infrared ◽  
Spectroscopic Studies ◽  
Excess Electron ◽  
Dimensional System ◽  
Triplet States ◽  
Electron Densities

AbstractFar infrared spectroscopic studies of electron-density- and magnetic-field-dependenceof manyelectron effects on silicon donor impurities confined in GaAs quantum wells are presented. At low excess electron densities, transitions from D− singlet and triplet states are observed. Temperature- and polarization-dependence measurements show that the relative absorption strengths of various spectroscopic features (D0, D−, and CR) are in qualitative agreement with a statistical calculation in thermal equilibrium in high magnetic fields. At large excess electron densities, the “D−” transition energy shifts to higher energy when electron density is increased, and the magnetic-field dependence of the transition energy exhibits discontinuities in slope at integer filling factors. The spectroscopic features and their relation to excess free carriers and the role of screening and correlation are presented and discussed.

Magnetic-field strengths from optical polarization data

1967 ◽  
Vol 31 ◽  
pp. 381-383
Author(s):  
J. M. Greenberg
Keyword(s):  
Magnetic Field ◽  
Optical Polarization ◽  
Polarization Data ◽  
Term Model ◽  
Source Of Information ◽  
Field Strengths

Van de Hulst (Paper 64, Table 1) has marked optical polarization as a questionable or marginal source of information concerning magnetic field strengths. Rather than arguing about this–I should rate this method asq+-, or quarrelling about the term ‘model-sensitive results’, I wish to stress the historical point that as recently as two years ago there were still some who questioned that optical polarization was definitely due to magnetically-oriented interstellar particles.

Observing the galactic magnetic field

1967 ◽  
Vol 31 ◽  
pp. 375-380
Author(s):  
H. C. van de Hulst
Keyword(s):  
Magnetic Field ◽  
Fair Agreement ◽  
Solar Neighbourhood ◽  
Galactic Magnetic Field ◽  
The Magnetic Field

Various methods of observing the galactic magnetic field are reviewed, and their results summarized. There is fair agreement about the direction of the magnetic field in the solar neighbourhood:l= 50° to 80°; the strength of the field in the disk is of the order of 10-5gauss.

Structure in the radiation of the galactic disk

1967 ◽  
Vol 31 ◽  
pp. 355-356
Author(s):  
R. D. Davies
Keyword(s):  
Magnetic Field ◽  
Galactic Disk ◽  
Galactic Magnetic Field ◽  
Measured Polarization

Observations at various frequencies between 136 and 1400 MHz indicate a considerable amount of structure in the galactic disk. This result appears consistent both with measured polarization percentages and with considerations of the strength of the galactic magnetic field.

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