Non-centrosymmetric transition metal monopnictides are emergent Weyl semimetals(WSMs)with exotic physical properties [1,2].Although chiral WSM states have b
Non-centrosymmetric transition metal monopnictides,including TaAs,TaP,NbAs and NbP,have been very recently proposed to be Weyl semimetals(WSMs),in which the
Sum-frequency generation spectroscopy is surface-specific only if the bulk contribution to the signal is negligible.Negligible bulk contribution is,however,