Magnetotransport properties and the Fermi surface of single crystal VB 2

A. B. Karki, Louisiana State University
D. P. Gautreaux, Louisiana State University
J. Y. Chan, Louisiana State University
N. Harrison, National High Magnetic Field Laboratory Los Almos
D. A. Browne, Louisiana State University
R. G. Goodrich, Louisiana State University
D. P. Young, Louisiana State University


We report the results of magnetotransport and de Haas-van Alphen (dHvA) measurements on high quality single crystals of VB2 grown from a molten aluminum flux. In addition, we compare these results to energy band calculations. At low temperature the magnetoresistance of VB2 is very large (∼1100%) and is found to be extremely sensitive to sample quality (RRR value). A large anisotropy in the magnetoresistance is observed. For the field applied along the a-axis, the magnetoresistance increases as the square of the field without saturation, consistent with the presence of open orbits. The field dependence of the magnetoresistance for the field applied along the c-axis is much weaker. © 2008 IOP Publishing Ltd.