Comments on "Negative capacitance effect in semiconductor devices" [by M. Ershov et al., with reply]

For original paper, see M. Ershov et al., ibid., vol. 45, pp. 2196-2206 (Oct. 1998). The original authors tried to interpret the negative capacitance (NC) phenomenon theoretically in physics. However, the commentators point out that the definition of capacitor from I=(G+jB) V used in the paper is not correct. Using an R-L-C resonance circuit they interpret the so-called NC, that is just an inductive effect. Instead of using the conventional R-C equivalent circuit model for a diode, one should use an R-C-L resonance circuit as the equivalent circuit for the diode. In reply, Ershov et al. assert that they proposed a convenient and physically sound approach to NC treatment based on transient current analysis and highlighted typical mistakes involved in NC interpretation. They refute the criticism of the definition of capacitance in terms of admittance made by the commentators.