NOPR Collection:

Conductance of ballistic superlattice in transverse magnetic field

2001-03-01T00:00:00Z

Title: Conductance of ballistic superlattice in transverse magnetic field Authors: Ghosh, P K; Mitra, B Abstract: The electronic transport of the ballistic superlattice in the presence of a transverse magnetic field within the constriction has been studied, where the wells have equal length across the constriction and the barriers are arranged in a manner either periodic or quasi-periodic· The conductance exhibits strong transmission resonances which drastically affected the quantized conductance, plateaus of the ideal unmodulated constriction. The magnetic field produces an overall rightward shift of the conductance. When the field increases, the peaks in the group of resonances are depressed progressively in the region of a given plateau and finally disappear in a stronger magnetic field. Page(s): 170-175

Investigations on sandwich structures of metal-free phthalocyanine (H₂PC) thin film using gold electrodes

2001-03-01T00:00:00Z

Title: Investigations on sandwich structures of metal-free phthalocyanine (H₂PC) thin film using gold electrodes Authors: Unni, K N Narayanan; Menon, C S Abstract: Sandwich structures of metal-free phthalocyanine (H₂Pc) thin films using gold electrodes have been prepared by thermal evaporation. The J-V characteristics are determined for films exposed to air and for films annealed in air at 523K. The temperature dependence of current density is studied for both ohmic and space charge limited conduction (SCLC). The effect of incorporation of oxygen into the structure in both cases is investigated. Page(s): 159-162

Effect of charge fluctuation on current pulses and instability in a plasma produced in admixture of gases subjected to dc corona discharge

2001-03-01T00:00:00Z

Title: Effect of charge fluctuation on current pulses and instability in a plasma produced in admixture of gases subjected to dc corona discharge Authors: Pimpale, Sushama S Abstract: The effect of time of exposure to electrodeless discharge on emission of counts for a temperature of 50°C in a fresh vessel under de excitation has been studied by exposing air at a pressure of 10 torr to a potential of 1.5 kV and to a bias of 5 V. The change of current pulses which is composed of the basic charging equation and fluctuations in the plasma has been discussed on the basis of charge equality and inequality in the plasma bounded by two concentric glass tubes. Page(s): 155-158

Growth and electrical transport properties of dithallium selenide single crystal

2001-03-01T00:00:00Z

Title: Growth and electrical transport properties of dithallium selenide single crystal Authors: Rahman, M Abdel Abstract: Crystals of the Tl₂Se were synthesized with the aid of locally designed simple new growth technique. This technique is based on Bridgman growth method. Electrical conductivity, Hall effect and Hall mobility were investigated as a function of temperature in the range 225-500K, on p-type single crystals.Measurements were crried out perpendicular to the c-axix. Variation of the charge carriers against temperatures was discussed. The energy gap width as well as the ionozation energy was computed. At room temperature the Hall mobility was found to be μ=500cm²/V. Page(s): 176-179

NOPR Collection:

Conductance of ballistic superlattice in transverse magnetic field

Investigations on sandwich structures of metal-free phthalocyanine (H2PC) thin film using gold electrodes

Effect of charge fluctuation on current pulses and instability in a plasma produced in admixture of gases subjected to dc corona discharge

Growth and electrical transport properties of dithallium selenide single crystal

Investigations on sandwich structures of metal-free phthalocyanine (H₂PC) thin film using gold electrodes