Publications by authors named "Nishkarsh Agarwal"
Recent demonstrations of moiré magnetism, featuring exotic phases with noncollinear spin order in the twisted van der Waals (vdW) magnet chromium triiodide CrI, have highlighted the potential of twist engineering of magnetic (vdW) materials. However, the local magnetic interactions, spin dynamics, and magnetic phase transitions within and across individual moiré supercells remain elusive. Taking advantage of a scanning single-spin magnetometry platform, here we report observation of two distinct magnetic phase transitions with separate critical temperatures within a moiré supercell of small-angle twisted double trilayer CrI.
View Article and Find Full Text PDFCharge density waves are emergent quantum states that spontaneously reduce crystal symmetry, drive metal-insulator transitions, and precede superconductivity. In low-dimensions, distinct quantum states arise, however, thermal fluctuations and external disorder destroy long-range order. Here we stabilize ordered two-dimensional (2D) charge density waves through endotaxial synthesis of confined monolayers of 1T-TaS.
View Article and Find Full Text PDFArticle Synopsis
- Moiré magnetism is a new and exciting area in condensed matter physics that involves unique interactions at the atomic level and is important for exploring complex physics.
- Researchers utilized spin defect-based imaging to observe magnetic domains and spin fluctuations in a materials system known as twisted double trilayer chromium triiodide (tDT CrI).
- The study finds that while there are distinct moiré domains with different magnetizations in tDT CrI, spin fluctuations show minimal variation, highlighting the role of intralayer exchange interactions and the potential of quantum spin sensors for further investigation.