Now showing items 1-3 of 3

    • Hall effect at a tunable metal-insulator transition 

      Teizer, Winfried; Hellman, F.; Dynes, RC. (American Physical Society, 2003)
      Using a rotating magnetic field, the Hall effect in three-dimensional amorphous GdxSi1-x has been measured in the critical regime of the metal-insulator transition for a constant total magnetic field. The Hall coefficient ...
    • Optical properties of metallic (III, Mn)V ferromagnetic semiconductors in the infrared to visible range 

      Hankiewicz, EM; Jungwirth, T.; Dietl, T.; Timm, C.; Sinova, Jairo. (American Physical Society, 2004)
      We report on a study of the ac conductivity and magneto-optical properties of metallic ferromagnetic (III, Mn)V semiconductors in the infrared to visible spectrum at zero temperature. Our analysis is based on the successful ...
    • Variation of the density of states in amorphous GdSi at the metal-insulator transition 

      Bokacheva, L.; Teizer, Winfried; Hellman, F.; Dynes, RC. (American Physical Society, 2004)
      We have performed detailed conductivity and tunneling measurements on the amorphous, magnetically doped material alpha-GdxSi1-x, which can be driven through the metal-insulator transition by the application of an external ...