Berlin 2024 – scientific programme
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QI: Fachverband Quanteninformation
QI 32: Quantum Sensing and Metrology
QI 32.11: Talk
Friday, March 22, 2024, 12:30–12:45, HFT-FT 131
Investigation of exotic phases in low-dimensional systems using nanoscale NMR with NV centres in diamond — •Marcel Martin1, Yash Nitin Palan2, Falko Pientka2, and Nabeel Aslam1 — 1Felix-Bloch-Institut für Festkörperphysik, Universität Leipzig — 2Institut für Theoretische Physik, Goethe-Universität Frankfurt am Main
Understanding exotic phases of matter such as unconventional superconductors, quantum spin liquids and topological insulators promises a deeper understanding of fundamental physics or even a new approach to technological challenges of our time. Especially in low dimensional systems, strong quantum effects can promote the occurrence of such phases. Conventional nuclear magnetic resonance (NMR) has proven to be a reliable and powerful method in the study of many such exotic phases in different materials but is limited to bulk samples.
Here, we present the novel approach of applying nanoscale NMR to low-dimensional solids and surfaces. Using nitrogen vacancy (NV) centres in diamond as local probes, we harness their ability to detect an NMR signal from thin layers even down to a single monolayer as well as from surfaces of bulk materials. This opens the door to the investigation of exotic phases in truly low-dimensional systems using NMR. In this talk, we will show first calculations for the study of induced superconductivity in one- and two-dimensional semiconductors. Other material classes of interest will also be discussed.
Keywords: Quantum sensing; NV center; Magnetic resonance; Superconductivity; Spin liquid