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Shift photovoltaic current and magnetically induced bulk photocurrent in piezoelectric sillenite crystals
Journal article   Open access   Peer reviewed

Shift photovoltaic current and magnetically induced bulk photocurrent in piezoelectric sillenite crystals

Aaron M. Burger, Lingyuan Gao, Radhe Agarwal, Alexey Aprelev, Jonathan E. Spanier, Andrew M. Rappe, Vladimir M. Fridkin and Univ. of Pennsylvania, Philadelphia, PA (United States)
Physical review. B, v 102(8)
18 Aug 2020
url
http://arxiv.org/abs/2005.08291View

Abstract

Materials Science Materials Science, Multidisciplinary Physical Sciences Physics Physics, Applied Physics, Condensed Matter Science & Technology Technology
Recently, it has been shown how shift and ballistic currents in piezoelectric sillenite crystals Bi12GeO20 and Bi12SiO20 can be separated experimentally under the assumption that the shift component of the circular current is small. However, it has been claimed that the shift and ballistic currents cannot be quantified by this method, due to the magnetophotovoltaic effect caused either by the change of the crystal's spatial symmetry in the magnetic field or by the breaking of time-reversal symmetry. Presently, we report observations of photovoltaic currents in Bi12SiO20, excited by linearly and circularly polarized light under weak external magnetic field, as well as measurements of the corresponding photo-Hall signals. We demonstrate that the magnetophotovoltaic current constitutes a significant fraction of the measured current in the Hall direction for Bi12SiO20 under specific experimental conditions.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
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