High-Efficiency and Large Supercurrent Rectification with Superconducting Coil
Abstract
Superconducting diodes (SDs) are devices that rectify supercurrent through the difference in the superconducting critical current (Ic) between forward and reverse current directions. For bringing such SDs closer to practical superconducting power electronics applications, a combination of both high rectification efficiency (η) and a large Ic difference (ΔIc) is required. Here, we propose and demonstrate a coil-shaped superconducting wire device concept to induce a large SD effect, arising from the compensation between an external magnetic field (Hext) and the field generated by the coil itself. From transport Ic measurements on coil-shaped SDs based on a Sn10-Pb90 solder wire, we achieved a η of 79% with a ΔIc of 140 A at Hext = 500 Oe (coil #2) and a η of 84% with a ΔIc of 125 A at Hext = 530 Oe (coil #3), confirming high rectification values at large supercurrents. The large-current high-efficiency SDE in the coil-shaped SDs will be highly useful for developing the potential field of supercurrent power electronics.
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BibTeX
@misc{ichikawa2026highefficiency,
title = {{High-Efficiency and Large Supercurrent Rectification with Superconducting Coil}},
author = {Takumi Ichikawa and Daisuke Takegami and Gen Nishijima and Shunsuke Kawakami and Tsutomu Nojima and Yuji Tsuchiya and Satoshi Awaji and Fuyuki Ando and Ken-ichi Uchida and Yuya Hattori and Yoshikazu Mizuguchi},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.11259},
eprint = {2610.11259},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.11259},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - High-Efficiency and Large Supercurrent Rectification with Superconducting Coil
AU - Takumi Ichikawa
AU - Daisuke Takegami
AU - Gen Nishijima
AU - Shunsuke Kawakami
AU - Tsutomu Nojima
AU - Yuji Tsuchiya
AU - Satoshi Awaji
AU - Fuyuki Ando
AU - Ken-ichi Uchida
AU - Yuya Hattori
AU - Yoshikazu Mizuguchi
PY - 2026
DA - 2026/10/13
PB - arXiv
DO - 10.48550/arxiv.2610.11259
UR - https://arxiv.org/abs/2610.11259
AB - Superconducting diodes (SDs) are devices that rectify supercurrent through the difference in the superconducting critical current (Ic) between forward and reverse current directions. For bringing such SDs closer to practical superconducting power electronics applications, a combination of both high rectification efficiency (η) and a large Ic difference (ΔIc) is required. Here, we propose and demonstrate a coil-shaped superconducting wire device concept to induce a large SD effect, arising from the compensation between an external magnetic field (Hext) and the field generated by the coil itself. From transport Ic measurements on coil-shaped SDs based on a Sn10-Pb90 solder wire, we achieved a η of 79% with a ΔIc of 140 A at Hext = 500 Oe (coil #2) and a η of 84% with a ΔIc of 125 A at Hext = 530 Oe (coil #3), confirming high rectification values at large supercurrents. The large-current high-efficiency SDE in the coil-shaped SDs will be highly useful for developing the potential field of supercurrent power electronics.
ER -