5 papers
Wide-field magnetic imaging of shielding-current-driven vortex rearrangement under local heating using diamond quantum sensors
Ryoei Ota, Shunsuke Nishimura, Koki Honda +6
Understanding and controlling vortex motion in superconductors are important both for suppressing dissipation in superconducting devices and for device applications that exploit vo…
Observation of individual vortex penetration in a coplanar superconducting resonator
Kirill Shulga, Shunsuke Nishimura, Pavel A. Volkov +7
We demonstrate the detection and control of individual Abrikosov vortices in superconducting microwave resonators. resonators with a narrowed region near the grounded end ac…
Visualization of Current-Driven Vortex Formation in High- Cuprate Superconductors
Shunsuke Nishimura, Takeyuki Tsuji, Takayuki Iwasaki +3
Type-II superconductors exhibit hysteretic behavior due to the presence of quantum vortices, and the order in which temperature and external field are varied plays a decisive role.…
Investigations of optical aberration on quantum diamond microscopy toward high spatial resolution and sensitivity
Shunsuke Nishimura, Moeta Tsukamoto, Kento Sasaki +1
Quantum diamond microscopy (QDM), which employs nitrogen-vacancy (NV) center ensembles, is a promising approach to quantitatively imaging magnetic fields with both high resolution…
Systematic investigation of dynamic nuclear polarization with boron vacancy in hexagonal boron nitride
Yuki Nakamura, Shunsuke Nishimura, Takuya Iwasaki +7
Dynamic nuclear polarization (DNP) using the boron vacancy () in hexagonal boron nitride (hBN) has gained increasing attention. Understanding this DNP requires syst…