Theorists make discovery in odd triplet pairing

Dec 14, 2007

In a paper which will shortly appear in Physical Review Letters, School of Physics and Astronomy Professor Oriol Valls along with lead author Klaus Halterman (China Lake, Naval Warfare Center) and co-author Paul Barsic (University of Minnesota) show that triplet superconducting pairing, odd in time, is induced in clean heterostructures consisting of an ordinary s-wave superconductor sandwiched between ferromagnets.

The paper ("Odd triplet pairing in clean Superconductor/Ferromagnet heterostructures") shows that the triplet correlations are spatially very long ranged.

They are largest at times of the order of the inverse of the cutoff frequency (usually the Debye frequency) of the s-wave superconducting interaction. The spatial behavior of these correlations is also discussed.

This phenomenon has implications not only for ordinary heterostructures but also for fermionic superfluidity in atomic systems, where different mechanisms for induced exotic superconductivity have been recently proposed (e.g. PRL 97, 020402, (2006)).

More information at arxiv.org/abs/0704.1820

Source: by Jenny Allan, University of Minnesota

Explore further: Superconducting circuits, simplified

add to favorites email to friend print save as pdf

Related Stories

Comet Siding Spring whizzes past Mars

4 hours ago

A comet the size of a small mountain whizzed past Mars on Sunday, dazzling space enthusiasts with the once-in-a-million-years encounter.

Major breakthrough could help detoxify pollutants

8 hours ago

Scientists at The University of Manchester hope a major breakthrough could lead to more effective methods for detoxifying dangerous pollutants like PCBs and dioxins. The result is a culmination of 15 years of research and ...

Recommended for you

Superconducting circuits, simplified

Oct 17, 2014

Computer chips with superconducting circuits—circuits with zero electrical resistance—would be 50 to 100 times as energy-efficient as today's chips, an attractive trait given the increasing power consumption ...

Protons hog the momentum in neutron-rich nuclei

Oct 16, 2014

Like dancers swirling on the dance floor with bystanders looking on, protons and neutrons that have briefly paired up in the nucleus have higher-average momentum, leaving less for non-paired nucleons. Using ...

Cosmic jets of young stars formed by magnetic fields

Oct 16, 2014

Astrophysical jets are counted among our Universe's most spectacular phenomena: From the centers of black holes, quasars, or protostars, these rays of matter sometimes protrude several light years into space. ...

User comments : 0