Andreev reflection at ferromagnetic metal‐triplet superconductor junction

Abstract

Properties of tunneling conductance spectra of a ferromagnetic-insulator-anisotropic spin triplet superconductor junction are theoretically investigated. The Andreev reflection and transmission of quasiparticles at the interfaces, parallel to the c-axis of the superconductor 2 4 Sr RuO , for unitary p-wave and nonunitary states are discussed. Asymmetry of the Andreev reflection amplitude with respect to the boundary normal is analyzed. Discussion of the resonance peak in this reflection is also performed. The essential influence of the magnitude and direction of the exchange field on the conduction spectrum is investigated.

Probing the magnetoelectric effect in noncentrosymmetric superconductors by equal-spin Andreev tunneling

“…In this respect, the present case differs from the AR spectroscopy of both singlet and triplet superconductors (see, e.g., Refs. [62][63][64][65][66][67][68]). Also, unlike the above-mentioned theories, to calculate the AR current we use the tunneling Hamiltonian in combination with the nonequilibrium Green function (NEGF) method of Ref.…”

Resonance Tunneling in Ferromagnet-Triplet Superconductors Junctions

“…When Θ < Θ c2 (for unitary states) or when Θ < Θ c1 (for non-unitary states) the Andreev holes exist and propagate in the ferromagnet. The amplitudes for both Andreev and normal reflections contain the term δ(E, Θ s , ϕ + − ϕ − ) [7] which is very sensitive to the phase difference ϕ + − ϕ − of the pairing potential felt by the electron-like (ELQ) and hole-like (HLQ) quasi-particles as well as to the angle of the interface orientation β. This sensitivity especially reveals itself in…”

“…[1][2][3][4][5][6][7] and references therein). The reason for the interest in this subject is that an orbitally anisotropic pairing state is still not well determined.…”

Ferromagnetic insulator effects in ferromagnetic semiconductor/ferromagnetic insulator/p-wave superconductor junctions

“…Moreover, the so-called zero-bias conductance peak (ZBCP) due to the Andreev bound states (ABS) and a double-minimum structure or a zero-bias conductance anomaly were observed in tunneling experiments by Mao et al [17] and Laube et al [18], respectively. Also, there are a large number of theoretical studies on the properties of normal metal/p-wave superconductor (N/P) and ferromagnet/p-wave superconductor (F/P) junctions [19][20][21][22][23][24][25][26][27][28].…”