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Helicity‐Dependent Photovoltaic Effect in Bi<sub>2</sub>Se<sub>3</sub> Under Normal Incident Light
Topological insulators (TIs) form a new class of materials with insulating bulk and surface conduction ensured by topologically protected surface states (TPSS). We investigate the impact of the helicity of a normally incident laser beam on the photovoltaic effect in the TI Bi2Se3. The observation of a helicity dependent photovoltaic …