Density of states anomalies in multichannel quantum wires

  title={Density of states anomalies in multichannel quantum wires},
  author={Hideo Yoshioka and Hiroyuki Shima},
  journal={Physical Review B},
We reformulate the Tomonaga--Luttinger liquid theory for quasi-one-dimensional Fermion systems with many subbands across the Fermi energy. Our theory enables us to obtain a rigorous expression of the local density of states (LDOS) for general multichannel quantum wires, describing how the power-law anomalies of LDOS depend on inter- and intra-subbands couplings as well as the Fermi velocity of each band. The resulting formula for the exponents is valid in the case of both bulk contact and edge… Expand
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