Angle-dependent magnetoresistance oscillations due to magnetic breakdown orbits

Details Angle-dependent magnetoresistance oscillations due to magnetic breakdown orbits Angle-dependent magnetoresistance oscillations due to magnetic breakdown orbits

2007-02-24

arxiv.org/abs/cond-mat/0702570v2

Phys. Rev. B 76, 052510 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures Version 2

Scientific paper

10.1103/PhysRevB.76.052510

We present experimental evidence for a hitherto unconfirmed type of angle-dependent magnetoresistance oscillation caused by magnetic breakdown. The effect was observed in the organic superconductor kappa-(BEDT-TTF)$_2$Cu(NCS)$_2$ using hydrostatic pressures of up to 9.8 kbar and magnetic fields of up to 33 T. In addition, we show that similar oscillations are revealed in ambient pressure measurements, provided that the Shubnikov-de Haas oscillations are suppressed either by elevated temperatures or filtering of the data. These results provide a compelling validation of Pippard's semiclassical picture of magnetic breakdown.

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