Now showing items 4051-4060 of 4078
Far‐infrared absorption spectra measured in InAs/Al0.36Ga0.64Sb quantum wells
(The American Institute of Physics, 1990-05-07)
Far‐infrared absorption spectra have been measured for molecular beam epitaxial InAs/Al0.36Ga0.64Sb multiquantum wells by Fourier transform infrared spectroscopy using light incident normal to the layers. The special band ...
Electronic structure of monoclinic BaBiO3
(The American Institute of Physics, 1990-01-25)
We present the results of photoemission studies of ‘‘valence disordered’’ monoclinic BaBiO3 in the photon energy range 15–120 eV. The line‐shapes of the valence band photoemission spectra and the Ba contributions to the ...
Structure of the 12j and 15j coefficients in the Bargmann approach
(The American Institute of Physics, 1974-09)
Generating functions of the 12j and 15j angular momentum recoupling coefficients are computed explicitly in the Bargmann formalism. Symmetry properties are deduced therefrom. A geometrical Möbius strip representation ...
Pseudomorphic InGaAs base ballistic hot‐electron device
(The American Institute of Physics, 1988-11-14)
We report the first successful incorporation of a pseudomorphic InGaAs base in a ballistic hot‐electron device. The device, with a 28‐nm‐thick In0.15Ga0.85As base, had a collector‐base breakdown voltage of 0.55 V and a ...
Growth and properties of quasiperiodic heterostructures
(Elsevier, 1987-02-02)
We have recently demonstrated the MBE growth of heterostructures in which layers of GaAs and AlAs were deposited in a Fibonacci sequence. This yields a quasiperiodic structure with the ratio of incommensurate periods equal ...
Tests of a large air‐core superconducting solenoid as a nuclear‐reaction‐product spectrometer
(The American Institute of Physics, 1987-09)
An air‐core superconducting solenoid, with a diameter of 0.2 m and a length of 0.4 m, has been configured for use as a heavy‐ion reaction‐product spectrometer (E/A≤5 MeV/u) near θ=0 °. The spectrometer has a large solid ...
Instability of Three‐Layer Viscous Stratified Flow
(The American Institute of Physics, 1969-12)
Instability of plane Couette flow of three superposed layers of fluids of different viscosity between two horizontal planes is investigated. It is found that there are two modes of disturbance dominated, respectively, by ...
Hyperfine structure in the red emission system of NbN
(The American Institute of Physics, 1975-10-01)
A detailed study of hyperfine structure observed in the 0,0 band of the 3Φ (aβ) →3Δ (aβ) system of NbN has shown that the secondary hyperfine effects observed in this structure are not due to a perturbation in the 3Δ state ...