ELFT HÍRADÓ

[Szabolcs Csonka <csonka AT dept.phy.bme.hu>]

MEGHIVO

A BME Fizika Tanszek Nanoszeminariuman aprilis 8-an (kedden) 10:45-tol a 
BME F epulet I. lepcsohaz I. emeleten, a Fizika Tanszek szeminariumi 
szobajaban


*Halász Gábor*^1,2

1. Department of Materials Science and Metallurgy, Cambridge, United Kingdom

2. Rudolf Peierls Centre for Theoretical Physics, Oxford, United Kingdom

*Spin-triplet supercurrents in superconductor / ferromagnet 
heterostructures*

cimmel tart eloadast.

Abstract:

In a Josephson junction, the non-superconducting weak link connecting 
the two superconductors can sustain a finite supercurrent via 
spin-singlet Cooper pairs penetrating the non-superconducting material. 
However, if the weak link consists of a ferromagnetic material, this 
supercurrent decays in only a few nanometers because the presence of 
magnetism is disruptive for spin-singlet Cooper pairs. In our research, 
we investigated - both theoretically and experimentally - the 
possibility of generating a longer-ranged supercurrent through a 
magnetic material by converting the magnetically sensitive spin-singlet 
Cooper pairs into spin-triplet Cooper pairs that are robust against 
magnetism. This conversion is possible for example by introducing 
non-collinear magnets, helical magnets, or magnetic domain walls into 
the weak link.


Minden erdeklodot szeretettel latunk!

Csonka Szabolcs

--
Szabolcs Csonka
Solid State Physics Laboratory, Department of Physics
Budapest University of Technology and Economics
1111 Budapest, Budafoki út 8
Building F, Entrance I, Basement 6
Phone: +36-1-4633056
Fax: +36-1-4634180
email:csonka AT dept.phy.bme.hu
http://dept.phy.bme.hu/staff/csonka/csonka.html