Interlayer Magnetoresistance of the Layered Organic Conductor (DMET)$_{2}$I$_{3}$

The interlayer magnetoresistance $\rho _{zz}(\theta $,$\phi )$ of the layered organic conductor (DMET)$_{2}$I$_{3}$ is reported for all possible orientations in a 9T magnetic field at 100 mK, and compared with existing theoretical models. We have also calculated $\rho _{zz}(\theta $,$\phi )$ for such Q1D conductors using semiclassical calculations employing, for the first time$^{1}$, the true triclinic crystal structure. These calculations are in qualitative agreement with our data, especially in the $y-z$ plane, where all previous models fail to reproduce the experimentally observed$^{2}$ Lebed magic angle effect$^{3}$. These results will be useful to understand the relationship between the different kinds of angular effects in this and other families of layered organic conductors. This work was supported by NSF Grant No. DMR 0605339. [1]. H. Yoshino, \textit{et al.}, (unpublished). [2]. S. Uji, \textit{et al.}, Proceeding of Physical Phenomena at High Magnetic Fields III (World Scientific, London, 1998), p 227. [3]. A. G. Lebed, JETP Lett. \textbf{43}, 174 (1986); T. Osada, \textit{et al.}, Phys. Rev. Lett. \textbf{66}, 1525 (1991); M. J. Naughton, \textit{et al.}, Phys. Rev. Lett. \textbf{67}, 3712 (1991).