Large-Tiny Spin-Stripe SDW Order in La${}_3$Ni${}_2$O${}_7$ via ${}^{139}$La-NQR Spectroscopy: Reconsideration Based on the $Am2m$ Structure

Mitsuharu Yashima, Hongnam Lee, Takumi Ino +5

The lower-symmetry $Am2m$ structure was recently proposed as the intrinsic ambient-pressure phase of La${}_3$Ni${}_2$O${}_7$ based on synchrotron x-ray diffraction, whereas earlier studi…