Noise-power studies of the nearly commensurate quasi-one-dimensional conductor (N-methylphenazinium<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mo>)</mo></mrow><mrow><mi mathvariant="normal">x</mi></mrow></msub></mrow></math>(phenazine<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mo>)</mo></mrow><mrow><mn>1</mn><mi mathvariant="normal">−</mi><mi mathvariant="normal">x</mi></mrow></msub></mrow></math> (7,7,8,8-tetracyano-p-quinodimethane) [(NMP<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mo>)</mo></mrow><mrow><mi mathvariant="normal">x</mi></mrow></msub></mrow></math>(Phen<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mo>)</mo></mrow><mrow><mn>1</mn><mi mathvariant="normal">−</mi><mi mathvariant="normal">x</mi></mrow></msub></mrow></math>(TCNQ)]

H. Rommelmann; A. J. Epstein; Joel S. Miller; P. J. Restle; R. D. Black; M. B. Weissman

doi:10.1103/PhysRevB.32.1257

Noise-power studies of the nearly commensurate quasi-one-dimensional conductor (N-methylphenazinium $)_{x}$ (phenazine $)_{1 - x}$ (7,7,8,8-tetracyano-p-quinodimethane) [(NMP $)_{x}$ (Phen $)_{1 - x}$ (TCNQ)]

H. Rommelmann, A. J. Epstein, Joel S. Miller, P. J. Restle, R. D. Black, and M. B. Weissman

Phys. Rev. B 32, 1257 – Published 15 July 1985

Abstract

We report the noise power of (NMP $)_{x}$ (Phen $)_{1 - x}$ (TCNQ) as a function of temperature (100≤T≤300 K), frequency (1≤f≤ $10^{4}$ Hz), electric field (0≤E≤300 V/cm), and conduction-electron density (0.49≤x≤0.59). The results for the commensurate, doped commensurate, and incommensurate regimes are similar. The magnitude of the 1/f noise is in considerable excess of typical scaled values for other materials, suggesting the role of large units in the fluctuations. A thermally activated spectral feature is reported. Excess non-Gaussian noise is detected immediately following the formation of a microcrack, though this contribution to the noise decays with time.