Superconductivity in an organic insulator at very high magnetic fields

2001/03/22 by L. Balicas, J. S. Brooks, K. Storr +7 · 1 citation
Physics and Astronomy · #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.87.067002

9 pages 3 figures

arxiv created 2001/03/22 · arxiv updated 2009/11/30

Abstract

We investigate by electrical transport the field-induced superconducting state (FISC) in the organic conductor λ-(BETS)₂FeCl₄. Below 4 K, antiferromagnetic-insulator, metallic, and eventually superconducting (FISC) ground states are observed with increasing in-plane magnetic field. The FISC state survives between 18 and 41 T, and can be interpreted in terms of the Jaccarino-Peter effect, where the external magnetic field \em compensates the exchange field of aligned Fe³⁺ ions. We further argue that the Fe³⁺ moments are essential to stabilize the resulting singlet, two-dimensional superconducting state

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