  We study the magnetoelectric and magnetothermal transport properties of
noncentrosymmetric metals using semiclassical Boltzmann transport formalism by
incorporating the effects of Berry curvature and orbital magnetic moment. These
effects impart quadratic-B dependence to the magnetoelectric and magnetothermal
conductivities, leading to intriguing phenomena such as planar Hall effect,
negative magnetoresistance, planar Nernst effect and negative Seebeck effect.
The transport coefficients associated with these effects show the usual
oscillatory behavior with respect to the angle between the applied electric
field and magnetic field. The bands of noncentrosymmetric metals are split by
Rashba spin-orbit coupling except at a band touching point. For Fermi energy
below (above) the band touching point, giant (diminished) negative
magnetoresistance is observed. This difference in the nature of
magnetoresistance is related to the magnitudes of the velocities, Berry
curvature and orbital magnetic moment on the respective Fermi surfaces, where
the orbital magnetic moment plays the dominant role. The absolute
magnetoresistance and planar Hall conductivity show a decreasing (increasing)
trend with Rashba coupling parameter for Fermi energy below (above) the band
touching point.
