Conductance quantization and Andreev reflection in narrow ferromagnet/superconductor point contacts
K. Kikuchi, H. Imamura, S. Takahashi, S. Maekawa
DOI 10.1103/PhysRevB.65.020508 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The conductance quantization and Andreev reflection of narrow ferromagnet/superconductor point contacts are theoretically studied. We show that the conductance quantization and the Andreev reflection depend on whether the contact region is superconducting or ferromagnetic as well as on the strength of the exchange field in the ferromagnet. The Andreev reflection of the ferromagnetic contact is more suppressed than that of the superconducting contact. We also show that the conductance-voltage curve has a bump at zero bias voltage if there is no interfacial scattering. On the contrary, the conductance-voltage curve shows a dip if the system has an interfacial scattering.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ta Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Spin accumulation and Andreev reflection in a mesoscopic ferromagnetic wire
similarity 0.96W. Belzig et al.
Source status unknown — claims are unverified
Quantum phase diffusion in ac-driven superconducting atomic point contacts
similarity 0.96M. F. Carusela & J. Ankerhold
Source status unknown — claims are unverified
Dynamical quantum phase transitions in a mesoscopic superconducting system
similarity 0.96K. Wrześniewski et al.
Source status unknown — claims are unverified
Circuit quantum electrodynamics with a superconducting quantum point contact
similarity 0.95G. Romero et al.
Source status unknown — claims are unverified
Enhancement of the retrapping current of superconducting microbridges of finite length
similarity 0.95D. Y. Vodolazov & F. M. Peeters
Source status unknown — claims are unverified
Nonequilibrium Quasiparticle Distribution in Superconducting Resonators: An Analytical Approach
similarity 0.95P.B. Fischer & G. Catelani
Source status unknown — claims are unverified