Publication: Vortex contribution to the critical temperature oscillations in hybrid superconductor-ferromagnet coaxial cylinders
0
0
Issued Date
2013
Resource Type
File Type
application/pdf
ISSN
9214534
Other identifier(s)
2-s2.0-84883124925
Rights Holder(s)
Scopus
Bibliographic Citation
Physica C: Superconductivity and its Applications. Vol 495, No. (2013), p.5-9
Suggested Citation
Krunavakarn B., Yoksan S. Vortex contribution to the critical temperature oscillations in hybrid superconductor-ferromagnet coaxial cylinders. Physica C: Superconductivity and its Applications. Vol 495, No. (2013), p.5-9. doi:10.1016/j.physc.2013.07.006 Retrieved from: https://hdl.handle.net/20.500.14740/6560
Author(s)
Abstract
The s-wave triplet Usadel equations which include the odd frequency triplet condensate are employed to study the oscillatory behavior of the superconducting critical temperature Tc in multiply connected hybrid systems e.g., a ferromagnetic core surrounded by a superconducting shell. This configuration allows us to treat the angular momentum number L of the Cooper pair as the vorticity parameter. The spiral exchange field in the ferromagnet characterized by a spiral wave vector Q, which rotates in the z-plane and its direction varies within an in-plane of the ferromagnetic core. The induced superconductivity in the ferromagnet core is controlled by the electrical contact at the boundary for which we are interested in the switching of the superconducting states among the various vorticity numbers. The peculiar superconducting states with L ≠ 0 bear resemblance to the pi-phase state in the bilayer systems. We demonstrate the switching phenomena by solving the Usadel equations together with the self-consistent order parameter subject to the Kupriyanov-Lukichev boundary conditions at the contact surface to obtain the secular equation in the multimode method to determine the oscillatory behavior of Tc in the ferromagnet core. The Abrikosov-Gorkov like-formula is also obtained within the single mode approximation. © 2013 Elsevier B.V. All rights reserved.
Subject(s)
Critical temperatures
Oscillatory behaviors
Proximity effects
Single-mode approximation
Superconducting critical temperatures
Superconducting state
Switching phenomenon
Triplet superconductivity
Ferromagnetic materials
Ferromagnetism
Hybrid systems
Magnets
Superconducting materials
Temperature
Vortex flow
Vorticity
Superconductivity
Oscillatory behaviors
Proximity effects
Single-mode approximation
Superconducting critical temperatures
Superconducting state
Switching phenomenon
Triplet superconductivity
Ferromagnetic materials
Ferromagnetism
Hybrid systems
Magnets
Superconducting materials
Temperature
Vortex flow
Vorticity
Superconductivity