Experimental Evidence for Helical Instabilities in a Semiconductor Plasma

Volume-controlled current injection in insulators

“…From these data it was determined that Nt 2: 3 x 1014 ~m -~ and E, -Et N 0.8 ev. Of unusual interest has been the repeated observation of the trapfree square law (2.4) in thin CdS crystals by , Wright et al (1959) and Page et al (1962). Other space-charge-limited current studies of CdS are reported by Ruppel and Smith (1959), Ruppel(l960, 1961), Bube (1962), Barton (1959), Steinberger (1960), Dresner and Shallcross (1962), Muller (1962) and Zuleeg (1963).…”

“…Lampert of the instabilities. Some references pertinent to the study of the instabilities are: Ivanov and Ryvkin (1958), Bok and Veilex (1959), Larrabee and Steele (1960), Glicksman (1961), Ancker-Johnson et al (1961), Okamoto et al (1962, Ancker-Johnson (1962) and Larrabee (1963).…”

“…Consider, for example, the interesting case of bimolecular recombination, .T = ? (e) = ( ( 7 ; ~~) n)-I, where o is the magnitude of the relative velocity between electrons and holes, uR = aR(u) is the bimolecular recombination cross section, and ( ) denotes the average over the The analytically derived result (Parmenter and Ruppel 1959) is the same as (3.4) except that the numerical factor 2 is replaced by (9~/8)'/2 = 1.87. At T = 3 0 0 " ~ a reasonable value for (mn) is about cm3 sec-1, giving po 'v 10-5 cm2 v-l sec-1.…”

Comprehensive Review on Various Instabilities in Semiconductor Quantum Plasma

“…When an external magnetic field is applied parallel to a flowing current in a semiconductor and if its value is increased above a critical value, an oscillistor is observed [135][136][137][138][139][140][141][142].…”

“…However at a significantly higher value of magnetic field (> 500 G), the effect on ionization rate may be a valid study. Okamoto et al [140] successfully performed an experiment showing evidence of helical instabilities in semiconductor plasma, and clearly, the dependence of oscillations on the angle between electric and magnetic fields has been established. They have made two conclusions where in first it was said that helical instabilities do exist in oscillistor and the theory proposed by Glicksman [143] for the threshold field agrees quantitatively, and the second was if the transverse component of the magnetic field is present current oscillations is induced in the oscillistor.…”