Abstract
We have studied the c-axis interlayer magnetoresistance (ILMR), R c ( B ) in graphite. The measurements have been performed on strongly anisotropic highly oriented pyrolytic graphite (HOPG) and single crystalline Kish graphite samples in magnetic field up to B = 9 T , and the temperature interval 2 K ⩽ T ⩽ 300 K . We have observed negative magnetoresistance, d R c / d B < 0 , for B ‖ c -axis for both samples above a certain field B m ( T ) > 5.4 T and 0.2 T for HOPG and Kish graphite, respectively. The results can be understood consistently by assuming that ILMR is related to a tunneling between zero-energy Landau levels of quasi-two-dimensional Dirac fermions, in a close analogy with the behavior reported for α-(BEDT-TTF) 2I 3 [N. Tajima, et al., Phys. Rev. Lett. 102 (2009) 176403], another multilayer Dirac electron system.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
