Optical Chiral Induced Spin Selectivity XMCD Study
Oren Ben Dor,
Shira Yochelis,
Hendrik Ohldag,
Yossi Paltiel
Affiliations
Oren Ben Dor
Applied Physics Department and the Center for Nano-Science and Nano-Technology The Hebrew University of Jerusalem Jerusalem 9190401 Israel
Shira Yochelis
Applied Physics Department and the Center for Nano-Science and Nano-Technology The Hebrew University of Jerusalem Jerusalem 9190401 Israel
Hendrik Ohldag
Stanford Synchrotron Radiation Laboratory Stanford University, P.O. Box 20450, Menlo Park California 94025, USA
Yossi Paltiel
Applied Physics Department and the Center for Nano-Science and Nano-Technology The Hebrew University of Jerusalem Jerusalem 9190401 Israel. [email protected]
The chiral induced spin selectivity (CISS) effect in which selective transport of electron spins through helical chiral molecules occurs, has attracted a lot of attention in recent years. This effect was used to magnetize ferromagnetic (FM) samples by utilizing adsorbed chiral molecules. The electron transfer through the molecules was generated optically or electrically. In the optical configuration, circularly polarized light induced efficient magnetization by spin torque transfer (STT), using a hybrid of quantum dots (QDs) and chiral molecule self-assembled monolayer (SAM). Here, we use X-ray magnetic chiral dichroism (XMCD) spectroscopy in order to probe the optically induced magnetization on thin FM films. The results show differences in the FM magnetization depending on the optical circular polarization, matching previous non-local Hall probe measurements.
