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Hauptverfasser:	Ota, Ryoei, Nishimura, Shunsuke, Honda, Koki, Tsuji, Takeyuki, Yamashita, Taro, Iwasaki, Takayuki, Hatano, Mutsuko, Sasaki, Kento, Kobayashi, Kensuke
Format:	Preprint
Veröffentlicht:	2026
Schlagworte:	Superconductivity
Online-Zugang:	https://arxiv.org/abs/2604.14578
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

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author	Ota, Ryoei Nishimura, Shunsuke Honda, Koki Tsuji, Takeyuki Yamashita, Taro Iwasaki, Takayuki Hatano, Mutsuko Sasaki, Kento Kobayashi, Kensuke
author_facet	Ota, Ryoei Nishimura, Shunsuke Honda, Koki Tsuji, Takeyuki Yamashita, Taro Iwasaki, Takayuki Hatano, Mutsuko Sasaki, Kento Kobayashi, Kensuke
contents	Understanding and controlling vortex motion in superconductors are important both for suppressing dissipation in superconducting devices and for device applications that exploit vortices. In this work, we quantitatively imaged the stray magnetic field distribution of vortices in an NbN thin film by wide-field magnetic imaging using a perfectly aligned diamond NV ensemble. By continuously measuring while stepwise varying the applied magnetic field under local laser heating, we captured a rearrangement of the vortex configuration in real space and in real time over more than 100 min. The observed vortex rearrangement is consistent with a reduction of the pinning force due to local laser heating and with the Lorentz force exerted by shielding currents induced by the field variation. These results provide insight into vortex dynamics and suggest potential applications, including vortex exclusion from sensitive regions of superconducting devices and vortex positioning in vortex-based devices.
format	Preprint
id	arxiv_https___arxiv_org_abs_2604_14578
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	Wide-field magnetic imaging of shielding-current-driven vortex rearrangement under local heating using diamond quantum sensors Ota, Ryoei Nishimura, Shunsuke Honda, Koki Tsuji, Takeyuki Yamashita, Taro Iwasaki, Takayuki Hatano, Mutsuko Sasaki, Kento Kobayashi, Kensuke Superconductivity Understanding and controlling vortex motion in superconductors are important both for suppressing dissipation in superconducting devices and for device applications that exploit vortices. In this work, we quantitatively imaged the stray magnetic field distribution of vortices in an NbN thin film by wide-field magnetic imaging using a perfectly aligned diamond NV ensemble. By continuously measuring while stepwise varying the applied magnetic field under local laser heating, we captured a rearrangement of the vortex configuration in real space and in real time over more than 100 min. The observed vortex rearrangement is consistent with a reduction of the pinning force due to local laser heating and with the Lorentz force exerted by shielding currents induced by the field variation. These results provide insight into vortex dynamics and suggest potential applications, including vortex exclusion from sensitive regions of superconducting devices and vortex positioning in vortex-based devices.
title	Wide-field magnetic imaging of shielding-current-driven vortex rearrangement under local heating using diamond quantum sensors
topic	Superconductivity
url	https://arxiv.org/abs/2604.14578

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