Magnetotransport properties and the Fermi surface of high-quality single crystal VB$_{2}$

ORAL

Abstract

We have performed magnetotransport and dHvA measurements on high quality single crystals of VB$_{2}$ grown from a molten aluminum flux. At low temperature the magnetoresistance (MR) of VB$_{2}$ is very large ($\sim $1100{\%}) and is found to be extremely sensitive to sample quality. The field dependence of the MR is proportional to the applied field squared, as is expected from open orbits on the Fermi surface. In addition, we have performed full potential LAPW calculations with the WIEN2K band package using the GGA density functional to compute the bands and Fermi surface. The calculations suggest that the area of the Fermi surface is a strong function of the lattice constants. The results of the calculations will be compared to experiment.

–

Authors

  • A.B. Karki

    Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803

  • D. Gautreaux

    Department of Chemistry, Louisiana State Univrsity, Baton Rouge, LA 70803

  • J.Y. Chan

    Department of Chemistry, Louisiana State Univrsity, Baton Rouge, LA 70803

  • N. Harrison

    Los Alamos National Labs, National High Magnetic Field Laboratory, Los Alamos National Laboratory, National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, NHMFL-LANL

  • D. Browne

    Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803

  • R.G. Goodrich

    Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803

  • D.P. Young

    Louisiana State University, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803