Cryogenic Operation of Electromechanical Relay for Reversal of Quantized Current Generated by a Single-Electron Pump. - Shuji Nakamura; Daiki Matsumaru; Gento Yamahata; Takehiko Oe; Yuma Okazaki; Shintaro Takada; Michitaka Maruyama; Akira Fujiwara; Nobu-hisa Kaneko (IEEE Trans. Instrum. Meas., 2023)