Significant modulation of acoustoelectric current associated with charge density wave transitions
Abstract
We studied acoustoelectric (AE) currents in materials that undergo charge density wave (CDW) transitions, induced by a surface acoustic wave (SAW) on a piezoelectric substrate. The polarity and magnitude of the AE current in NbSe3 and 2H-TaSe2 were modulated due to their CDW transitions. We also found that the sign of the AE current depends on the SAW propagation direction with respect to the crystalline axis of the substrate.A phenomenological model assuming strain-modified conductivity can qualitatively account for the significant modulation of the AE current associated with the CDW transition, as well as the SAW propagation orientation dependence. The present results offer a powerful probe for exploring SAW-electron interactions in van der Waals materials, thereby highlighting their potential for advancing the emerging field of straintronics.
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BibTeX
@misc{nikaido2026significant,
title = {{Significant modulation of acoustoelectric current associated with charge density wave transitions}},
author = {Natsumi Nikaido and Takuya Kawada and Koji Fujiwara and Jihoon Park and Nan Jiang and Kouta Kondou and Shintaro Takada and Yasuhiro Niimi},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.27959},
eprint = {2608.27959},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.27959},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Significant modulation of acoustoelectric current associated with charge density wave transitions
AU - Natsumi Nikaido
AU - Takuya Kawada
AU - Koji Fujiwara
AU - Jihoon Park
AU - Nan Jiang
AU - Kouta Kondou
AU - Shintaro Takada
AU - Yasuhiro Niimi
PY - 2026
DA - 2026/08/28
PB - arXiv
DO - 10.48550/arxiv.2608.27959
UR - https://arxiv.org/abs/2608.27959
AB - We studied acoustoelectric (AE) currents in materials that undergo charge density wave (CDW) transitions, induced by a surface acoustic wave (SAW) on a piezoelectric substrate. The polarity and magnitude of the AE current in NbSe_3 and 2H-TaSe_2 were modulated due to their CDW transitions. We also found that the sign of the AE current depends on the SAW propagation direction with respect to the crystalline axis of the substrate.A phenomenological model assuming strain-modified conductivity can qualitatively account for the significant modulation of the AE current associated with the CDW transition, as well as the SAW propagation orientation dependence. The present results offer a powerful probe for exploring SAW-electron interactions in van der Waals materials, thereby highlighting their potential for advancing the emerging field of straintronics.
ER -