Abstract：
:The application of a sufficiently strong magnetic field to a superconductor will, in general, destroy the superconducting state. Two mechanisms are responsible for this. The first is the Zeeman effect, which breaks apart the paired electrons if they are in a spin-singlet (but not a spin-triplet) state. The second is the so-called 'orbital' effect, whereby the vortices penetrate into the superconductors and the energy gain due to the formation of the paired electrons is lost. For the case of layered, two-dimensional superconductors, such as the high-Tc copper oxides, the orbital effect is reduced when the applied magnetic field is parallel to the conducting layers. Here we report resistance and magnetic-torque experiments on single crystals of the quasi-two-dimensional organic conductor lambda-(BETS)2FeCl4, where BETS is bis(ethylenedithio)tetraselenafulvalene. We find that for magnetic fields applied exactly parallel to the conducting layers of the crystals, superconductivity is induced for fields above 17 T at a temperature of 0.1 K. The resulting phase diagram indicates that the transition temperature increases with magnetic field, that is, the superconducting state is further stabilized with magnetic field.
journal_name
Naturejournal_title
Natureauthors
Uji S,Shinagawa H,Terashima T,Yakabe T,Terai Y,Tokumoto M,Kobayashi A,Tanaka H,Kobayashi Hdoi
10.1038/35073531keywords:
subject
Has Abstractpub_date
2001-04-19 00:00:00pages
908-10issue
6831eissn
0028-0836issn
1476-4687pii
35073531journal_volume
410pub_type
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