Theory of the nonlinear response of doped magnetic topological materials: resonant photovoltaic effect

Pankaj Bhalla; Allan H. MacDonald; Dimitrie Culcer

doi:10.1117/12.2565266

20 August 2020 Theory of the nonlinear response of doped magnetic topological materials: resonant photovoltaic effect

Pankaj Bhalla, Allan H. MacDonald, Dimitrie Culcer

Proceedings Volume 11470, Spintronics XIII; 114700X (2020) https://doi.org/10.1117/12.2565266
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

The rectified non-linear response of a clean, time-reversal symmetric, undoped semiconductor to an ac electric field includes a well known intrinsic shift current. In a recent work we demonstrated that, when Kramers degeneracy is broken, a distinct second order rectified response appears due to Bloch state anomalous velocities in a system with an oscillating Fermi surface. This effect has been termed the resonant photovoltaic effect (RPE). It manifests itself as a resonant galvanic current peak at the interband absorption threshold in doped semiconductors or semimetals with approximate particle-hole symmetry. In this manuscript we present a detailed theory of this effect, and we evaluate the RPE for a model of the surface states of a magnetized topological insulator.

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Citation Download Citation

Pankaj Bhalla, Allan H. MacDonald, and Dimitrie Culcer "Theory of the nonlinear response of doped magnetic topological materials: resonant photovoltaic effect", Proc. SPIE 11470, Spintronics XIII, 114700X (20 August 2020); https://doi.org/10.1117/12.2565266

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