Giant topological longitudinal circular photo-galvanic effect in the chiral multifold semimetal CoSi

Zhuoliang Ni; K. Wang; Y. Zhang; O. Pozo; B. Xu; X. Han; K. Manna; J. Paglione; C. Felser; A. G. Grushin; F. de Juan; E. J. Mele; Liang Wu

doi:10.1038/s41467-020-20408-5

Nature Communications (Jan 2021)

Giant topological longitudinal circular photo-galvanic effect in the chiral multifold semimetal CoSi

Zhuoliang Ni,
K. Wang,
Y. Zhang,
O. Pozo,
B. Xu,
X. Han,
K. Manna,
J. Paglione,
C. Felser,
A. G. Grushin,
F. de Juan,
E. J. Mele,
Liang Wu

Affiliations

Zhuoliang Ni: Department of Physics and Astronomy, University of Pennsylvania
K. Wang: Maryland Quantum Materials Center, Department of Physics, University of Maryland
Y. Zhang: Department of Physics, Massachusetts Institute of Technology
O. Pozo: Instituto de Ciencia de Materiales de Madrid, CSIC
B. Xu: Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg
X. Han: Department of Physics and Astronomy, University of Pennsylvania
K. Manna: Max-Planck-Institut fur Chemische Physik fester Stoffe
J. Paglione: Maryland Quantum Materials Center, Department of Physics, University of Maryland
C. Felser: Max-Planck-Institut fur Chemische Physik fester Stoffe
A. G. Grushin: University of Grenoble Alpes, CNRS, Grenoble INP, Institut Néel
F. de Juan: Donostia International Physics Center
E. J. Mele: Department of Physics and Astronomy, University of Pennsylvania
Liang Wu: Department of Physics and Astronomy, University of Pennsylvania

DOI: https://doi.org/10.1038/s41467-020-20408-5
Journal volume & issue: Vol. 12, no. 1
pp. 1 – 8

Abstract

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Quantized circular photogalvanic effect (CPGE) is predicted in chiral topological semimetals, but the experimental observation remains challenging. Here, Ni et al. observe a large topological longitudinal photocurrent in CoSi, which is much larger than the photocurrent in any other chiral crystals, indicating quantized CPGE within reach upon doping and increase of the hot-carrier lifetime.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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