عنوان مقاله [English]
In this paper, we have investigated the transport properties of the Dirac fermions on a topological insulator surface in the presence of external electric and magnetic fields. For this reason, firstly we obtain the eigen energies (or eigenvalues) by using the Dirac Hamiltonian of the system for transmitted electrons via the surface and the Lorentz transformations. The conductance of the system is calculated by Landauer equation. Also, the effects of electric and magnetic fields are investigated on the conductance and Fano factor effect. The application of the present results may be useful in designing devices based on molecular electronics in nanoscale.
 M.Z. Hassan, C. Kane, Topological insulators, Reviews of Modern Physics 82 (2010) 3045.
 X.-L. Qi, Zhang S.-C. Zhang, The quantum spin: Hall effect and topological insulators, Physics Today 63 (2010) 33.
 L. Fu, C.L. Kane, E.J. Mele, Topological Insulators in Three Dimensions, Physical Review Letters 98 (2007).
 F.D.M. Haldane, Model for a Quantum Hall Effect without Landau Levels: Condensed-Matter Realization of the Parity Anomaly, Physical Review Letters61 (1988) 2015.
 C.L. Kane, E.J. Mele, Z2 Topological Order and the Quantum Spin Hall Effect, Physical Review Letters 95 (2005) 146802.
 C. Nayak, S.H. Simon, A. Stern, M. Freedma, S. Das sarma, Non-Abelian anyons and topological quantum computation, Reviews of Modern Physics80 (2008) 1083.
 S. Mondal, D. Sen, K. Sengupta, R. Shankar, Tuning the Conductance of Dirac Fermions on the Surface of a Topological Insulator, Physical Review Letters104 (2010) 046403.
 T. Yokoyama, Y. Tanaka, N. Nagaosa, Anomalous magnetoresistance on the topological surface, arXiv: 0907.2810v2 (unpublished).
 Y. M Blanter and M Büttiker, Shot noise in mesoscopic conductors, Physics Reports 336 (2000) 1.