TY - JOUR
T1 - Theory of proximity effect in s+p -wave superconductor junctions
AU - Tanaka, Yukio
AU - Kokkeler, Tim
AU - Golubov, Alexander
N1 - Funding Information:
This work was supported by Scientific Research (A) (KAKENHI Grant No. JP20H00131), and Scientific Research (B) (KAKENHI Grants No. JP18H01176 and No. JP20H01857). T.K. acknowledges financial support from Spanish AEI through project PID2020-114252GB-I00 (SPIRIT).
Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/6/17
Y1 - 2022/6/17
N2 - We derive a boundary condition for the Nambu Keldysh Green's function in diffusive normal metal-unconventional superconductor junctions applicable for mixed parity pairing. Applying this theory to a 1d model of s+p-wave superconductor, we calculate LDOS in DN and charge conductance of DN-s+p-wave superconductor junctions. When the s-wave component of the pair potential is dominant, LDOS has a gap like structure at zero energy and the dominant pairing in DN is even-frequency spin-singlet s-wave. On the other hand, when the p-wave component is dominant, the resulting LDOS has a zero energy peak and the dominant pairing in DN is odd-frequency spin-triplet s-wave. We show the robustness of the quantization of the conductance when the magnitude of p-wave component of the pair potential is larger than that of s-wave one. These results show the robustness of the anomalous proximity effect specific to spin-triplet superconductor junctions.
AB - We derive a boundary condition for the Nambu Keldysh Green's function in diffusive normal metal-unconventional superconductor junctions applicable for mixed parity pairing. Applying this theory to a 1d model of s+p-wave superconductor, we calculate LDOS in DN and charge conductance of DN-s+p-wave superconductor junctions. When the s-wave component of the pair potential is dominant, LDOS has a gap like structure at zero energy and the dominant pairing in DN is even-frequency spin-singlet s-wave. On the other hand, when the p-wave component is dominant, the resulting LDOS has a zero energy peak and the dominant pairing in DN is odd-frequency spin-triplet s-wave. We show the robustness of the quantization of the conductance when the magnitude of p-wave component of the pair potential is larger than that of s-wave one. These results show the robustness of the anomalous proximity effect specific to spin-triplet superconductor junctions.
UR - http://www.scopus.com/inward/record.url?scp=85134345414&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.105.214512
DO - 10.1103/PhysRevB.105.214512
M3 - Article
AN - SCOPUS:85134345414
VL - 105
JO - Physical review B: Covering condensed matter and materials physics
JF - Physical review B: Covering condensed matter and materials physics
SN - 2469-9950
IS - 21
M1 - 214512
ER -