TY - JOUR
T1 - Spin photovoltaic effect in magnetic van der Waals heterostructures
AU - Song, Tiancheng
AU - Anderson, Eric
AU - Tu, Matisse Wei Yuan
AU - Seyler, Kyle
AU - Taniguchi, Takashi
AU - Watanabe, Kenji
AU - McGuire, Michael A.
AU - Li, Xiaosong
AU - Cao, Ting
AU - Xiao, Di
AU - Yao, Wang
AU - Xu, Xiaodong
N1 - Publisher Copyright:
© 2021 The Authors.
PY - 2021/9
Y1 - 2021/9
N2 - The development of van der Waals (vdW) crystals and their heterostructures has created a fascinating platform for exploring optoelectronic properties in the two-dimensional (2D) limit. With the recent discovery of 2D magnets, the control of the spin degree of freedom can be integrated to realize 2D spin-optoelectronics. Here, we report spin photovoltaic effects in vdW heterostructures of 2D magnet chromium triiodide (CrI3) sandwiched by graphene contacts. The photocurrent displays a distinct dependence on light helicity, which can be tuned by varying the magnetic states and photon energy. Circular polarization-resolved absorption measurements reveal that these observations originate from magnetic order-coupled and, thus, helicity-dependent charge-transfer excitons. The photocurrent displays multiple plateaus as the magnetic field is swept, associated with different CrI3 spin configurations. Giant photo-magnetocurrent is observed, which tends to infinity for a small applied bias. Our results pave the way to explore emergent photospintronics by engineering magnetic vdW heterostructures.
AB - The development of van der Waals (vdW) crystals and their heterostructures has created a fascinating platform for exploring optoelectronic properties in the two-dimensional (2D) limit. With the recent discovery of 2D magnets, the control of the spin degree of freedom can be integrated to realize 2D spin-optoelectronics. Here, we report spin photovoltaic effects in vdW heterostructures of 2D magnet chromium triiodide (CrI3) sandwiched by graphene contacts. The photocurrent displays a distinct dependence on light helicity, which can be tuned by varying the magnetic states and photon energy. Circular polarization-resolved absorption measurements reveal that these observations originate from magnetic order-coupled and, thus, helicity-dependent charge-transfer excitons. The photocurrent displays multiple plateaus as the magnetic field is swept, associated with different CrI3 spin configurations. Giant photo-magnetocurrent is observed, which tends to infinity for a small applied bias. Our results pave the way to explore emergent photospintronics by engineering magnetic vdW heterostructures.
UR - http://www.scopus.com/inward/record.url?scp=85114124147&partnerID=8YFLogxK
U2 - 10.1126/sciadv.abg8094
DO - 10.1126/sciadv.abg8094
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C2 - 34516904
AN - SCOPUS:85114124147
SN - 2375-2548
VL - 7
JO - Science advances
JF - Science advances
IS - 36
M1 - abg8094
ER -
