Contribution of small closed orbits to magnetoresistance in quasi-two-dimensional conductors

Abstract

We find a striking peak structure in the magnetoresistance of the quasi-two-dimensional conductors ␤-͑BEDT-TTF͒ 2 I 3 and ␣-͑BEDT-TTF͒ 2 NH 4 Hg͑SCN͒ 4 for magnetic fields nearly parallel to the conducting plane. The peak structure can be ascribed to a Fermi-surface topological effect due to the small closed orbits on the side of the warped cylindrical Fermi surface. This effect provides a clue about how to evaluate the interlayer transfer integral. ͓S0163-1829͑98͒06503-5͔

Valley-Polarized Interlayer Conduction of Anisotropic Dirac Fermions inSrMnBi2

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Angle-dependent magnetoresistance of the layered organic superconductorκ−(ET)2Cu(NCS)Goddard1, Blundell2, Singleton3 et al. 2004Phys. Rev. B618760View full textAdd to dashboardCite

“…This is the origin of the in-plane peak effect in ρ zz , and suggests a coherent nature to the interlayer transport [34,35]. For highly anisotropic materials, the angular width, 2∆, of the in-plane peak, when measured in radians, can be approximated by 2v max ⊥ /v , where v max ⊥ is the maximum of the out-of-plane component of the quasiparticle velocity and v is the in-plane component parallel to the plane of rotation of the magnetic field [9].…”

Multidimensional nature of molecular organic conductors revealed by angular magnetoresistance oscillations

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