Researchers, led by Chunhui Rita Du from the University of California, San Diego, have made significant strides in understanding an engineered quantum state of matter known as moiré magnetism, which emerges when two-dimensional crystals are stacked with a slight twist. This area of study is at the cutting edge of condensed matter physics. By using quantum sensing, Du’s team has observed magnetic domains and spin behaviors in twisted double trilayer chromium triiodide (tDT CrI3). They found that in low-twist-angle structures, distinct moiré patterns of opposite magnetizations appear, while spin fluctuations show little variation due to strong interactions within the layers.
A crucial part of this discovery was made possible by using specially designed diamond plates, fabricated by the Qnami Quantum foundry. These plates, which contain very shallow implanted nitrogen-vacancy (NV) centers, allowed for precise imaging of the magnetic properties at the nanoscale.
This technical note explains how spatial resolution is defined in Scanning NV Magnetometry. For a given distance d between the NV center and the scanned surface, the best achievable lateral spatial resolution is 0.86 d.
Ramamoorthy Ramesh’s team, using Scanning NV data from Proteus Q, demonstrated ferroelectric control of magnons in BiFeO₃, enabling energy-efficient spin transport for low-dissipation nanoelectronics.
Researchers led by Benjamin Lawrie used NV relaxometry on the Qnami ProteusQ system to reveal critical behavior in a high-Tc ferromagnetic oxide, providing new insights into phase transitions at the nanoscale.
