Related Experiment Video
Updated: Dec 29, 2025

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Surface spin magnetism controls the polarized exciton emission from CdSe nanoplatelets
Elena V Shornikova1, Aleksandr A Golovatenko2, Dmitri R Yakovlev3,4
1Experimentelle Physik 2, Technische Universität Dortmund, Dortmund, Germany. elena.shornikova@tu-dortmund.de.
Abstract:
The surface of nominally diamagnetic colloidal CdSe nanoplatelets can demonstrate paramagnetic behaviour owing to the uncompensated spins of dangling bonds, as we reveal here by optical spectroscopy in high magnetic fields up to 15 T using the exciton spin as a probe of the surface magnetism. The strongly nonlinear magnetic field dependence of the circular polarization of the exciton emission is determined by the magnetization of the dangling-bond spins (DBSs), the exciton spin polarization as well as the spin-dependent recombination of dark excitons. The sign of the exciton-DBS exchange interaction depends on the nanoplatelet growth conditions.
More Related Videos
Related Concept Videos
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
Atomic Nuclei: Nuclear Spin State Overview
Valence Bond Theory
π Electron Effects on Chemical Shift: Overview
The Pauli Exclusion Principle
Atomic Nuclei: Nuclear Relaxation Processes

