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Dissipationless valley diode effects in Kekulé graphene superlattices
Abstract
Superconducting diodes have attracted considerable interest for nonreciprocal device applications owing to their dissipationless transport. Here, we theoretically propose that a tunnel junction based on the Kekulé graphene superlattice can host a finite valley supercurrent that exhibits pronounced nonreciprocity even in the absence of superconductivity, giving rise to a dissipationless valley diode effect. This effect originates from the additional reflection phase acquired by electrons in each transverse channel and supports perfect valley diode rectification with 100% efficiency, which can be readily tuned via the gate voltage. This finding provides a platform for designing dissipationless valleytronics in a more versatile manner.
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BibTeX
@misc{zeng2026dissipationless,
title = {{Dissipationless valley diode effects in Kekulé graphene superlattices}},
author = {W. Zeng},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.04396},
eprint = {2611.04396},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.04396},
}
RIS
TY - UNPB
TI - Dissipationless valley diode effects in Kekulé graphene superlattices
AU - W. Zeng
PY - 2026
DA - 2026/11/03
PB - arXiv
DO - 10.48550/arxiv.2611.04396
UR - https://arxiv.org/abs/2611.04396
AB - Superconducting diodes have attracted considerable interest for nonreciprocal device applications owing to their dissipationless transport. Here, we theoretically propose that a tunnel junction based on the Kekulé graphene superlattice can host a finite valley supercurrent that exhibits pronounced nonreciprocity even in the absence of superconductivity, giving rise to a dissipationless valley diode effect. This effect originates from the additional reflection phase acquired by electrons in each transverse channel and supports perfect valley diode rectification with 100% efficiency, which can be readily tuned via the gate voltage. This finding provides a platform for designing dissipationless valleytronics in a more versatile manner.
ER -