|
|
Gershenzon EM, Gol'tsman GN, Ptitsina NG, Riger ER. Effect of electron-electron collisions on the trapping of free carriers by shallow impurity centers in germanium. Sov Phys JETP. 1986;64(4):889–97.
Abstract: Cascade Auger recombination of free carriers on shallow impurities in Ge is investigated under quasi-equilibrium conditions (T= 2-12 K) and in impurity breakdown. The Auger capture cross sections are found to be a,= 5. 10-l9 T-'n cm2 for donors and uip= 7- T-5p cm2 for acceptors. It is shown that in an isotropic semiconductor (p-Ge) ui is well described by the cascade-capture theory that takes into account only electron-electron collisions. In an anisotropic semiconductor ui is considerably larger (n-Ge, strongly uniaxially compressedp-Ge). Under impurity breakdown conditions the electron-electron collisions determine the lifetimes of the free carriers only in samples with appreciable density of the compensating impurity (Nk loi3 cmP3).
|
|
|
|
Gershenzon EM, Gol'tsman G, Ptitsina NG. Energy spectrum of free excitons in germanium. JETP Lett. 1973;18(3):93.
|
|
|
|
Gershenzon EM, Goltsman GN, Multanovskii VV, Ptitsina NG. Kinetics of submillimeter impurity and exciton photoconduction in Ge. Optics and Spectroscopy. 1982;52(4):454–5.
|
|
|
|
Gershenzon EM, Gurvich YA, Orlova SL, Ptitsina NG. Scattering of electrons by charged impurities in Ge under cyclotron resonance conditions. Presumably: Sov Phys Semicond | Физика и техника полупроводников. 1976;10:1379–83.
|
|
|
|
Gershenzon EM, Gurvich YA, Orlova SL, Ptitsina NG. Cyclotron resonance of electrons in Ge in a quantizing magnetic field in the case of inelastic scattering by acoustic phonons. Sov Phys JETP. 1975;40(2):311–5.
Abstract: Results are presented of an experimental study of the linewidth of cyclotron resonance under strong quantization conditions on the scattering of electrons by acoustic phonons. The measurements were performed in the 2....{).4 mm wavelength range at temperatures between 10 and 1.4 OK. A number of singularities were observed in the temperature and frequency dependences of the cyclotron linewidth. These can be ascribed to the effect of inhomogeneous broadening due to nonparabolicity of the electron spectrum, which is renormalized as a result of interaction with acoustic phonons.
|
|
|
|
Gershenzon EM, Orlov LA, Ptitsina NG. Absorption spectra in electron transitions between excited states of impurities in germanium. JETP Lett. 1975;22(4):95–7.
|
|
|
|
Gershenzon EM, Orlova SL, Orlov LA, Ptitsina NG, Rabinovich RI. Intervalley cyclotron-impurity resonance of electrons in n-Ge. JETP Lett. 1976;24(3):125–8.
|
|
|
|
Gershenzon YM, Goltsman GN, Yelantyev AI, Petrova YB, Ptitsina NG, Filatov VS. Lecture demonstrations of properties of superconductors and liquid helium. USSR Rept Phys Math JPRS UPM. 1987;24(7):51.
Abstract: New demonstrations for low temperature physics courses are described. Two transparent Dewar vacuum flasks fitting one inside the other with the external flask for nitrogen and the internal flask for helium are used. The helium temperature can be regulated in the 4.2 to 1.6 K range and the effects of reducing helium to the superfluid state at 2.17 K can be shown: boiling abruptly stops and superfluid flow appears. In order to show the electric and magnetic characteristics of superconductivity, a superconducting NbTi solenoid containing nonsuperconducting wire and germanium and superconducting Nb materials with different critical temperatures is placed in the helium refrigerant vessel. The fall of the resistance at the critical temperatures can be shown. In order to show magnetic field and superconductive current flow properties a shunt of superconductive material is connected in parallel to the coil and is enclosed in a teflon container with a heater which can vary its temperature. When it is heated and not superconductive, magnetic field effects can be demonstrated and when it is unheated and superconducting a continuous current can be demonstrated.
|
|
|
|
Gol'tsman GN, Gusinskii EN, Malyavkin AV, Ptitsina NG, Selevko AG, Edel'shtein VM. The excitonic Zeeman effect in uniaxially-strained germanium. Sov Phys JETP. 1987;65(6):1233–41.
Abstract: We have carried out a high-resolution spectroscopic study of the absorption of submillimeter radiation by free excitons in germanium compressed along the [ 1 11 ] axis in a magnetic field parallel to the compression axis. In particular, we studied the splitting of the 1s- 2p transition in fields up to 6 kOe at T = 1.6 K, and observed a complex pattern in the Zeeman splitting which we believe is related to the effect of thermal motion of the excitons in a magnetic field on their internal structure (the magneto-Stark effect). The calculated submillimeter spectrum of excitons agrees with the experimental data. We predict that in a magnetic field the energy of the 2p, term is a minimum at a finite value of the exciton momentum perpendicular to the field-that is, the energy minimum forms a ring in momentum space. It follows that the density of states for this term must be a nonmonotonic function of the energy. A theory is developed of analogous phenomena in positronium.
|
|
|
|
Goltsman GN, Maliavkin AV, Ptitsina NG, Selevko AG. Magnetic exciton spectroscopy in uniaxially compressed Ge at submillimeter waves. In: Izv. Akad. Nauk SSSR, Seriya Fizicheskaya. Vol 50.; 1986. p. 280–1.
|
|
