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Published July 16, 2014 | Submitted
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Enhancement of surface photocurrents in topological insulators using magnetic superlattices

Abstract

The gapless surface states of topological insulators (TI) can potentially be used to detect and harvest low-frequency infrared light. Nonetheless, it was shown that significant surface photocurrents due to light with frequency below the bulk gap are rather hard to produce. Here we demonstrate that a periodic magnetic pattern added to the surface dramatically enhances surface photocurrents in TI's . The ability to produce substantial photocurrents on TI surfaces from mid-range and far-infrared light could be used in photovoltaic applications, as well as for detection of micrometer wavelength radiation.

Additional Information

Imported from arXiv.

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Submitted - 1403.0010v1.pdf

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August 19, 2023
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