Speaker
Boonlit Krunavakarn
Description
We argue that the Little-Parks effect, i.e., the oscillations of the
superconducting critical temperature $T_c$ as a function of the magnetic
flux threaded the superconducting cylinder, exhibits the feature of
the fractional quantized flux when a ferromagnetic metal filled in the
thin-walled superconducting shell, which caused by the exchange in-
teraction. Our analysis is based on the transport-like proximity effect
theory in the diffusive regime of Takahashi-Tachiki and shows explic-
itly that the extremum of $T_c$ in the vortex state $L$ corresponds to
the fractional values of fluxoid, and in particular the fractional flux
quantum occurred at the $L=1$ vortex state.
Author
Boonlit Krunavakarn
Co-authors
N Chamnan
C Nisaisue
