disorder-induced enhancement of transport through graphene p-n junctions

@misc{citeulike:2997472, abstract = {We investigate the electron transport through a graphene p-n junction under a perpendicular magnetic field. By using Landauar-Buttiker formalism combining with the non-equilibrium Green function method, the conductance is studied for the clean and disordered samples. For the clean p-n junction, the conductance is quite small. In the presence of disorders, it is strongly enhanced and exhibits plateau structure at suitable range of disorders. Our numerical results show that the lowest plateau can survive for a very broad range of disorder strength, but the existence of high plateaus depends on system parameters and sometimes can not be formed at all. When the disorder is slightly outside of this disorder range, some conductance plateaus can still emerge with its value lower than the ideal value. These results are in excellent agreement with the recent experiment.}, author = {Long, Wen and Sun, Qing-Feng and Wang, Jian }, citeulike-article-id = {2997472}, eprint = {0807.1578}, keywords = {disorder, graphene, magnetic, transport}, month = {Jul}, posted-at = {2008-07-13 19:42:47}, priority = {3}, title = {disorder-induced enhancement of transport through graphene p-n junctions}, url = {http://arxiv.org/abs/0807.1578}, year = {2008} }

TY - ELEC ID - citeulike:2997472 L3 - citeulike-article-id:2997472 TI - disorder-induced enhancement of transport through graphene p-n junctions N2 - We investigate the electron transport through a graphene p-n junction under a perpendicular magnetic field. By using Landauar-Buttiker formalism combining with the non-equilibrium Green function method, the conductance is studied for the clean and disordered samples. For the clean p-n junction, the conductance is quite small. In the presence of disorders, it is strongly enhanced and exhibits plateau structure at suitable range of disorders. Our numerical results show that the lowest plateau can survive for a very broad range of disorder strength, but the existence of high plateaus depends on system parameters and sometimes can not be formed at all. When the disorder is slightly outside of this disorder range, some conductance plateaus can still emerge with its value lower than the ideal value. These results are in excellent agreement with the recent experiment. KW - disorder KW - graphene KW - magnetic KW - transport AU - Long, Wen AU - Sun, Qing-Feng AU - Wang, Jian PY - 2008/Jul/10/ UR - http://arxiv.org/abs/0807.1578 ER -