New surface-sensitive spintronic terahertz spectroscopy technique reveals unique atomic vibrations near interfaces of two materials
Scientists at the U.S. Department of Energy’s (DOE) Argonne National Laboratory and the University of Washington have reported a new technique that could help advance the development of quantum technology. Their innovation, surface-sensitive spintronic terahertz spectroscopy (SSTS), provides an unprecedented look at how quantum materials behave at interfaces.
With the SSTS technique, a laser pulse is applied to one side of an oxide/metal sample and terahertz radiation is emitted. From the signal, the dynamics of the TO1 surface phonon is detected in the oxide at its interface with the metal. (Image by Argonne National Laboratory.)
“This technique allows us to study surface phonons — the collective vibrations of atoms at a material’s surface or interface between materials,” said Zhaodong Chu, a postdoctoral researcher at Argonne and first author of the study. “Our findings reveal striking differences between surface phonons and those in the bulk material, opening new avenues for research and applications.”
Source: https://www.spintronics-info.com/new-surface-sensitive-spintronic-terahertz-spectroscopy-technique-reveals
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