Magneto-optical studies of low-dimensional organic conductors

Abstract

Our periodic orbit resonance (POR) results on quasi-two-dimensional (q2D), highly anisotropic q2D and quasi-one-dimensional (q1D) organic conductors are reviewed together with our rotational cavity magneto-optical measurement system. Higher order POR up to seventh order has been observed in the q2D system (BEDT-TTF)Br(DIA), and the experimental conditions to observe POR and the cyclotron resonance (CR) are discussed. Highly anisotropic q2D Fermi surface (FS) in β″-(BEDT-TTF)(TCNQ), which was considered to have q1D FS previously, is proposed by our POR measurements, and the possible interpretations of other experimental results of β″-(BEDT-TTF)(TCNQ) are discussed assuming the highly anisotropic q2D FS. Finally, detailed q1D FS of (DMET)I, obtained from our POR results, is discussed in connection with the typical q1D system (TMTSF)ClO.

Signatures of the Berry curvature in the frequency dependent interlayer magnetoresistance in tilted magnetic fields

“…Remarkably, an identical result to equation ( 1) is obtained for bilayer systems [29,31,42]. The calculation in this case does not differ from that presented elsewhere.…”

“…By performing AMRO experiments at finite frequency, periodic orbit resonances [23][24][25] can be observed and used to extract even more information about the Fermi surface properties of a layered metal, for instance mapping out its Fermi velocity [26,27], and investigating the doping and temperature dependence of Fermi surfaces [28]. Periodic orbit resonances up to seventh order have been used in quasi-one-dimensional and quasi-two-dimensional organics to comprehensively map out anisotropic Fermi surfaces [29].…”