Anisotropic transverse magnetoresistivity in alpha-YbAlB4

Abstract

We measured the transverse magnetoresistivity of the mixed valence compound $\alpha$-YbAlB${}_4$. Two configurations were used where current was applied along [110] direction for both and magnetic field was applied along [-110] and $c$-axis. We found the transverse magnetoresistivity is highly anisotropic. In the weak field below 1 T, it is consistent with stronger $c$-$f$ hybridization in the $ab$ plane which was suggested from the previous zero field resistivity measurements. At the higher field above 3 T, we observed a negative transverse magnetoresistivity for the field applied along the $c$-axis. The temperature dependences of the resistivity measured at several different fields suggest the suppression of the heavy fermion behavior at the characteristic field of $\sim 5.5$ T.

6pages, 4 figures

References in corpus (4)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum Criticality in Heavy Fermion Metals
• Layered Kondo lattice model for quantum critical beta-YbAlB4
• β-YbAlB4: a critical nodal metal