The Weyl semimetal Tantalum Arsenide.

The Weyl semimetal Tantalum Arsenide has a colossal bulk photovoltaic effect – an intrinsic, or non-linear, generation of current from light more than ten times larger than ever previously achieved, according to researchers from Boston College, the University of California Los Angeles, and Ecole Polytechnique Federale de Lausanne. Credit: Kenneth Burch/Boston College

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DOI: https://doi.org/10.1038/s41563-019-0297-4