Phys. Rev. Lett. 91, 216402 (2003) [4 pages]Angle-Resolved Mapping of the Fermi Velocity in a Quasi-Two-Dimensional Organic ConductorReceived 28 May 2003; published 19 November 2003 We demonstrate a new method for determining the Fermi velocity in quasi-two-dimensional (Q2D) conductors. Application of a magnetic field parallel to the conducting layers results in periodic open orbit quasiparticle trajectories along the Q2D Fermi surface. Averaging of this motion over the Fermi surface leads to a resonance in the interlayer microwave conductivity. The resonance frequency is simply related to the extremal value of the Fermi velocity perpendicular to the applied field. Thus, angle dependent microwave studies enable a complete mapping of the in-plane Fermi velocity. We illustrate the applicability of this method for the highly 2D organic conductor κ-(BEDT-TTF)2I3. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.216402
DOI:
10.1103/PhysRevLett.91.216402
PACS:
71.18.+y, 72.15.Gd, 74.70.Kn, 76.40.+b
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