Little-Parks oscillation and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="normal">d</mml:mi></mml:math> -vector texture in spin-triplet superconducting rings with bias current

Thermal signatures of Little-Parks effect in the heat capacity of mesoscopic superconducting rings

Persistent current in small superconducting rings.

We study theoretically the contribution of fluctuating Cooper pairs to the persistent current in superconducting rings threaded by a magnetic flux. For sufficiently small rings, in which the coherence length xi exceeds the radius R, mean field theory predicts a full reduction of the transition temperature to zero near half-integer flux. We find that nevertheless a very large current is expected...

Rabi oscillation and electron-spin-echo envelope modulation of the photoexcited triplet spin system in silicon

Waseem Akhtar,1 Takeharu Sekiguchi,1 Tatsumasa Itahashi,1 Vasileia Filidou,2 John J. L. Morton,2,3 Leonid Vlasenko,4 and Kohei M. Itoh1,* 1School of Fundamental Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan 2Department of Materials, University of Oxford, Parks Road, Oxford OXI 3PH, United Kingdom 3London Centre for Nanotechnology, University Colleg...

Evidence for spin selectivity of triplet pairs in superconducting spin valves.

Spin selectivity in a ferromagnet results from a difference in the density of up- and down-spin electrons at the Fermi energy as a consequence of which the scattering rates depend on the spin orientation of the electrons. This property is utilized in spintronics to control the flow of electrons by ferromagnets in a ferromagnet (F1)/normal metal (N)/ferromagnet (F2) spin valve, where F1 acts as ...

Current-flux characteristics in mesoscopic non-superconducting rings.

We propose four different mechanisms responsible for the paramagnetic or diamagnetic persistent currents in normal metal rings and determine the circumstances for changes of the current from paramagnetic to diamagnetic and vice versa. This might qualitatively reproduce the experimental results of Bluhm et al (2009 Phys. Rev. Lett. 102 136802).