@article{ISI:000296372600014,
 abstract = {We provide a theory for the tunneling conductance G(V) of Dirac
electrons on the surface of a topological insulator as measured by a
spin-polarized scanning tunneling microscope tip for low-bias voltages
V. We show that if the in-plane rotational symmetry on the surface of
the topological insulator is broken by an external field that does not
couple to spin directly (such as an in-plane electric field), G(V)
exhibits an unconventional dependence on the direction of the
magnetization of the tip, i.e., it acquires a dependence on the
azimuthal angle of the magnetization of the tip. We also show that G(V)
can be used to measure the magnitude of the local out-of-plane spin
orientation of the Dirac electrons on the surface. We explain the role
of the Dirac electrons in this unconventional behavior and suggest
experiments to test our theory.},
 article-number = {165439},
 author = {Saha, K. and Das, Sourin and Sengupta, K. and Sen, Diptiman},
 doi = {10.1103/PhysRevB.84.165439},
 eissn = {1550-235X},
 issn = {1098-0121},
 journal = {PHYSICAL REVIEW B},
 month = {OCT 24},
 number = {16},
 times-cited = {13},
 title = {Spin-polarized STM spectra of Dirac electrons on the surface of a
topological insulator},
 unique-id = {ISI:000296372600014},
 volume = {84},
 year = {2011}
}