title: Anomalous Andreev bound state in noncentrosymmetric superconductors.
abstract: We study edge states of noncentrosymmetric superconductors where spin-singlet d-wave pairing mixes with spin-triplet p (or f)-wave one by spin-orbit coupling. For d(xy)-wave pairing, the obtained Andreev bound state has an anomalous dispersion as compared to conventional helical edge modes. A unique topologically protected time-reversal invariant Majorana bound state appears at the edge. The charge conductance in the noncentrosymmetric superconductor junctions reflects the anomalous structures of the dispersions, particularly the time-reversal invariant Majorana bound state is manifested as a zero bias conductance peak.
authors.affiliation: Department of Applied Physics, Nagoya University, Nagoya, 464-8603, Japan.
authors.forename: Yukio
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Mizuno
authors.forename: Takehito
authors.initials: T
authors.lastname: Yokoyama
authors.forename: Keiji
authors.initials: K
authors.lastname: Yada
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Sato