Stereoscopic study of angle-dependent interlayer magnetoresistance in the organic conductor κ-(BEDT-TTF)2Cu(NCS)2

We stereoscopically studied the angle-dependent interlayer magnetoresistance R-zz(theta,phi) of the organic conductor kappa-(BEDT-TTF)(2)Cu(NCS)(2). A pressure of 7 kbar was applied to render the sample fully metallic. The stereoscopic view enables us to distinguish between quasi-one-dimensional (Q1D) and quasi-two-dimensional (Q2D) types of mixed angular magnetoresistance oscillations. A crossover between Q1D features and Q2D features is observed at phi similar to 35 degrees when the field rotates in the conducting plane. While the coherence peak in the Q1D region has a constant angular width, 1.4 degrees, the width of the humplike peak in the Q2D region grows with inverse cos phi dependence up to 25 degrees. In addition, differences of the phi-dependence of R-zz(phi=0) and of its temperature dependence support the crossover behavior between Q1D and Q2D dominance.