Fermi surface of superconducting LaFePO determined by quantum oscillations
(2008)
Angle-dependent magnetoresistance oscillations due to magnetic breakdown orbits
Physical Review B - Condensed Matter and Materials Physics 76:5 (2007)
Abstract:
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 魏- (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. 漏 2007 The American Physical Society.Persistence to high temperatures of interlayer coherence in an organic superconductor.
Phys Rev Lett 99:2 (2007) 027004
Abstract:
The interlayer magnetoresistance rho(zz) of the organic metal kappa-(BEDT-TTF)(2)Cu(NCS)(2) is studied in fields of up to 45 T and at temperatures T from 0.5 to 30 K. The peak in rho(zz) seen in in-plane fields, a definitive signature of interlayer coherence, remains to Ts exceeding the Anderson criterion for incoherent transport by a factor approximately 30. Angle-dependent magnetoresistance oscillations are modeled using an approach based on field-induced quasiparticle paths on a 3D Fermi surface, to yield the T dependence of the scattering rate tau(-1). The results suggest that tau(-1) does not vary strongly over the Fermi surface, and that it has a T(2) dependence due to electron-electron scattering.Angle-dependent magnetoresistance oscillations due to magnetic breakdown orbits
(2007)
Persistence to high temperatures of interlayer coherence in an organic superconductor
(2006)