On the possibility of steady state negative mobility in externally ionised gas mixtures

Abstract

The possibility of the occurrence of steady state negative electron mobility in externally ionised gas mixtures is considered. The requirements for the existence of the effect are discussed, using the example of externally ionised argon-fluorine gas mixtures. Results of numerical calculations of the drift velocity in electron-beam irradiated Ar/F2 gas mixtures are presented, which predict the occurrence of the effect in actual cases.

Absolute negative conductivity in Xe/Cs mixture under photoionization conditions

“…A number of works (Dyatko et al 1987, 1989, Golovinskii and Shchedrin 1989, Rozenberg et al 1988 are devoted to the investigation of the absolute negative conductivity in the stationary mode. In such circumstances the presence of a component gas with a high rate of electron attachment in the low-energy region in a mixture with heavy rare gases is an important condition.…”

Absolute negative mobility of the chain of Brownian particles in steady laminar flows

“…The phenomenon of ANM has been studied under various absolute negative conductance or resistance devices, such as tunnel junctions between superconductors with unequal energy gaps [23,24], semiconductor devices [25][26][27][28][29][30][31], photovoltaic eects in ruby crystals [32][33][34], and certain ionized gas mixtures [35,36]. A most ecient tunable separation mechanism is based on the anomalous transport feature of ANM, this approach may provide mass selectivity required in present and future separation of a diversity of nano-and microsized particles of either biological or synthetic origin [37].…”

Driven tracer with absolute negative mobility

“…Thus, previous studies demonstrating ANM considered a driving field which acts on nonequilibrium steady states. These include systems with a periodic [48][49][50][51][52][53][54][55][56][57][58] or a random [57,[59][60][61][62] drive, random walkers [20,[45][46][47], strong interactions and noise in spatially periodic potentials [63][64][65][66][67], and others [68][69][70][71]. A different setup where ANM has been found both experimentally and theoretically involves quantum mechanical effects such as absolute negative conductivity for semiconductors, where negative conductivity is associated with a negative effective mass of the carriers (either electrons or holes) [52,72,73], or interactions between light and matter [51,[74][75][76][77].…”