Abstract
A new addition to the family of Hall effects is the nonlinear Hall effect. We investigate the role of hexagonal warping of the band structure of surface Dirac fermions in the nonlinear Hall effect in 3D topological insulators. Most relevant to our study is Bi2Te3, where we show that its surface states exhibit pronounced nonlinear Hall effect in the presence of warping. We investigate this nonlinear Hall effect as a function of Fermi energy, bandgap, warping strength, and temperature.
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