Journal
PHYSICAL REVIEW B
Volume 79, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.060505
Keywords
bound states; quantum Hall effect; spin Hall effect; spin polarised transport; superconducting materials
Funding
- Ministry of Education, Culture, Sports, Science, and Technology, Japan
- [20654030]
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We study the spin transport properties of the noncentrosymmetric superconductor with time-reversal symmetry where spin-triplet (p(x)+/- ip(y))-wave and spin-singlet s-wave pair potentials can mix with each other. We show that when the amplitude of the (p(x)+/- ip(y))-wave pair potential is larger than that of s-wave one, the superconducting state belongs to the topologically nontrivial class analogous to the quantum spin Hall system, and the resulting helical edge modes as Andreev bound states are topologically protected. We find that the incident angle dependent spin polarized current flows through the interface due to the presence of the helical edge modes. With a weak magnetic field, also the angle-integrated current is strongly spin polarized.
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