TY - JOUR
T1 - Electric Tuning of Vortex Ratchet Effect in NbSe2
AU - Qiao, Jiabin
AU - Liu, Haiwen
AU - Zhang, Ding
N1 - Publisher Copyright:
© 2023 American Chemical Society.
PY - 2024/1/10
Y1 - 2024/1/10
N2 - Inversion symmetry breaking has played an important role in recent discoveries of nonreciprocal charge transport. Niobium diselenide, for example, lacks an inversion center in the monolayer form and can host prominent nonreciprocal transport property. Here, however, we observe a nonreciprocal transport signal in the second-harmonic channel of bulk-like NbSe2, in which inversion symmetry of the lattice seems preserved. The second-harmonic signal occurs along different in-plane current orientations and appears not only in the vortex-liquid regime but also even in the superconducting fluctuation regime without an applied magnetic field. By adding a direct current (DC) bias, we quantify the symmetry breaking effect in the vortex-liquid regime. The DC bias also suggests that the rectification effect at the contacts may account for the seemingly nonreciprocal transport at zero magnetic field. Our results demonstrate that DC biasing is a useful knob for addressing nonreciprocal charge transport in a wide range of materials.
AB - Inversion symmetry breaking has played an important role in recent discoveries of nonreciprocal charge transport. Niobium diselenide, for example, lacks an inversion center in the monolayer form and can host prominent nonreciprocal transport property. Here, however, we observe a nonreciprocal transport signal in the second-harmonic channel of bulk-like NbSe2, in which inversion symmetry of the lattice seems preserved. The second-harmonic signal occurs along different in-plane current orientations and appears not only in the vortex-liquid regime but also even in the superconducting fluctuation regime without an applied magnetic field. By adding a direct current (DC) bias, we quantify the symmetry breaking effect in the vortex-liquid regime. The DC bias also suggests that the rectification effect at the contacts may account for the seemingly nonreciprocal transport at zero magnetic field. Our results demonstrate that DC biasing is a useful knob for addressing nonreciprocal charge transport in a wide range of materials.
KW - Vortex ratchet effect
KW - direct current biasing
KW - inversion symmetry breaking
KW - nonreciprocal charge transport
KW - second-harmonic signal
UR - http://www.scopus.com/inward/record.url?scp=85181803188&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.3c04585
DO - 10.1021/acs.nanolett.3c04585
M3 - Article
C2 - 38147442
AN - SCOPUS:85181803188
SN - 1530-6984
VL - 24
SP - 511
EP - 518
JO - Nano Letters
JF - Nano Letters
IS - 1
ER -