Theory of proximity effect in s plus p-wave superconductor junctions

被引：10

作者：

Tanaka, Yukio ^{[1
]}

Kokkeler, Tim ^{[2
,3
]}

Golubov, Alexander ^{[2
]}

机构：

[1] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[2] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

[3] Donostia Int Phys Ctr DIPC, Donostia San Sebastian 20018, Spain

来源：

PHYSICAL REVIEW B | 2022年 / 105卷 / 21期

关键词：

TUNNELING SPECTROSCOPY; CIRCUIT-THEORY; BOUND-STATES; REALIZATION; CONDUCTANCE; EQUATIONS;

D O I：

10.1103/PhysRevB.105.214512

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：21

共 67 条

[1]

ABRAHAMS E, 1995, PHYS REV B, V52, P1271, DOI 10.1103/PhysRevB.52.1271

[2] Proximity effect with noncentrosymmetric superconductors [J].

Annunziata, Gaetano ;

Manske, Dirk ;

Linder, Jacob .

PHYSICAL REVIEW B, 2012, 86 (17)

[3]

[Anonymous], 1988, PHYS JETP, V67, P1163

[4] Anomalous Josephson effect in p-wave dirty junctions [J].

Asano, Y ;

Tanaka, Y ;

Kashiwaya, S .

PHYSICAL REVIEW LETTERS, 2006, 96 (09)

[5] Josephson effect due to odd-frequency pairs in diffusive half metals [J].

Asano, Yasuhiro ;

Tanaka, Yukio ;

Golubov, Alexander A. .

PHYSICAL REVIEW LETTERS, 2007, 98 (10)

[6] Majorana fermions and odd-frequency Cooper pairs in a normal-metal nanowire proximity-coupled to a topological superconductor [J].

Asano, Yasuhiro ;

Tanaka, Yukio .

PHYSICAL REVIEW B, 2013, 87 (10)

[7] NEW CLASS OF SINGLET SUPERCONDUCTORS WHICH BREAK TIME-REVERSAL AND PARITY [J].

BALATSKY, A ;

ABRAHAMS, E .

PHYSICAL REVIEW B, 1992, 45 (22) :13125-13128

[8] Heavy fermion superconductivity and magnetic order in noncentrosymmetric CePt3Si -: art. no. 027003 [J].

Bauer, E ;

Hilscher, G ;

Michor, H ;

Paul, C ;

Scheidt, EW ;

Gribanov, A ;

Seropegin, Y ;

Noël, H ;

Sigrist, M ;

Rogl, P .

PHYSICAL REVIEW LETTERS, 2004, 92 (02) :4

[9] Local density of states in a dirty normal metal connected to a superconductor [J].

Belzig, W ;

Bruder, C ;

Schon, G .

PHYSICAL REVIEW B, 1996, 54 (13) :9443-9448

[10]

BEREZINSKII VL, 1974, JETP LETT+, V20, P287

← 1 2 3 4 5 6 7 →