• R S Srivastava

      Articles written in Pramana – Journal of Physics

    • Frequency dependence of the surface states at the N-type Si-SiO2 interface

      R J Singh R S Srivastava

      More Details Abstract Fulltext PDF

      The response of the surface states at then-type Si-SiO2 interface to the different a.c. signal frequencies has been studied. The response values have been computed from both the measured capacitance voltage (C-V) and conductance-voltage (G-V) techniques. The results presented show that the frequency response of the effective density of states to different a.c. signal frequencies is proportional to the log of the applied frequencies.

    • Distribution of surface states based on Hill and Coleman conductance technique

      R J Singh R S Srivastava

      More Details Abstract Fulltext PDF

      Hill-Coleman’s single frequency conductance technique for the determination of surface state density has been extended upto 2 kHz. A.c. conductance (Gm) and capacitance (Cm)versus gate bias (VG) curves were obtained at various signal frequencies. Shift of the observed peaks in theGm versus VG curves for different signal frequencies was utilized for the determination of surface state density at different surface potentials (φs). Determination of surface state density for differentφs values was also done by Nicollian-Goetzberger method and the results compared. Results obtained by Hill-Coleman technique compare reasonably well with those obtained by the other method.

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