@article{ISI:000274336600036,
 abstract = {We study the transport properties of the Dirac fermions with a Fermi
velocity v(F) on the surface of a topological insulator across a
ferromagnetic strip providing an exchange field J over a region of width
d. We show that the conductance of such a junction, in the clean limit
and at low temperature, changes from oscillatory to a monotonically
decreasing function of d beyond a critical J. This leads to the possible
realization of a magnetic switch using these junctions. We also study
the conductance of these Dirac fermions across a potential barrier of
width d and potential V-0 in the presence of such a ferromagnetic strip
and show that beyond a critical J, the criteria of conductance maxima
changes from chi = eV(0)d/(h) over barv(F) = n pi to chi = (n + 1/2)pi
for integer n. We point out that these novel phenomena have no analogs
in graphene and suggest experiments which can probe them.},
 article-number = {046403},
 author = {Mondal, S. and Sen, D. and Sengupta, K. and Shankar, R.},
 doi = {10.1103/PhysRevLett.104.046403},
 eissn = {1079-7114},
 issn = {0031-9007},
 journal = {PHYSICAL REVIEW LETTERS},
 month = {JAN 29},
 number = {4},
 times-cited = {103},
 title = {Tuning the Conductance of Dirac Fermions on the Surface of a Topological
Insulator},
 unique-id = {ISI:000274336600036},
 volume = {104},
 year = {2010}
}