Speakers
Description
Mn-doped II–VI nanostructures provide a clean playground to study how lattice vibrations reshape electronic and spin states. In our recent work on 0D Mn-doped (CdSe)₁₃ clusters and 2D Mn-doped CdSe(en)₀.₅ nanosheets, we observe giant magnetic moments and room-temperature giant Zeeman splitting, accompanied by strain-sensitive LO phonons and strong magneto-optical responses. Microstrain domains, ligand-induced distortions, and symmetry breaking in these crystals suggest that specific phonon modes modulate Mn²⁺ zero-field splitting and sp–d exchange, opening phonon-assisted spin-flip channels.
So far our picture comes from Raman, PL, EPR, and X-ray probes, which are effectively limited to Q ≈ 0. The next step is to resolve how these strain-engineered phonons evolve across momentum and length scales using neutron spectroscopy (INS, NSE) and total scattering/PDF. We will outline our materials platform, key phonon signatures, and open questions on spin–phonon coupling, and we are actively seeking collaborators with neutron-scattering expertise to design and execute joint experiments on these nanostructures at large-scale facilities.
| Session | Materials Science |
|---|
