Enhancement of tunneling density of states at a Y junction of spin-12Tomonaga–Luttinger liquid wires

摘要: We calculate the tunneling density of states (TDOS) in a three wire junction interacting spin-1/2 electrons, and find an anomalous enhancement TDOS zero bias limit, even for repulsive interactions several bosonic fixed points. This is physically related to reflection holes from incident it occurs only vicinity ($x < v_{\rm min}/2\omega$ where $v_{\rm min}$ minimum velocity charge or spin excitations $\omega$ frequency), crossing over bulk value which always suppressed, at larger distances. The exponent can be directly probed STM experiment by measuring differential conductance as function either voltage temperature done C. Blumenstein et al. Nature Physics 7, 776 (2011).