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Updated: May 28, 2026
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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Efficient spin resolved spectroscopy observation machine at Hiroshima Synchrotron Radiation Center
Taichi Okuda1, Koji Miyamaoto, Hirokazu Miyahara
1Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan. okudat@hiroshima-u.ac.jp
The Review of Scientific Instruments
|November 4, 2011
Summary
A new spin- and angle-resolved photoelectron spectrometer (SARPES) offers high resolution for material analysis. This advanced instrument enables comprehensive studies of spin electronic structures.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Surface Science
Background:
- Spin-resolved photoemission spectroscopy is crucial for understanding electron behavior in materials.
- Existing techniques often face limitations in energy and angular resolution, hindering detailed analysis.
- Developing advanced instrumentation is essential for progress in spintronics and quantum materials.
Purpose of the Study:
- To introduce and characterize a novel, highly efficient spin- and angle-resolved photoelectron spectrometer (SARPES).
- To demonstrate the capability of the new instrument for high-resolution measurements of electronic band structures and Fermi surfaces.
- To enable comprehensive investigations into the spin-dependent electronic properties of materials.
Main Methods:
- Development of the Efficient SPin REsolved SpectroScopy Observation (ESPRESSO) machine at Hiroshima Synchrotron Radiation Center's BL-9B beamline.
- Integration of a high-resolution hemispherical electron analyzer with a high-efficiency spin detector utilizing very low energy electron diffraction (VLEED) on a ferromagnetic target.
- Utilizing a two-dimensional electron detector for spin-integrated ARPES measurements and the VLEED-based detector for spin analysis.
Main Results:
- Achieved an energy resolution of 7.5 meV and an angular resolution of ±0.18° with spin resolution.
- Demonstrated the compatibility of high energy and angular resolution with SARPES measurements.
- Successfully combined quick energy-band dispersion measurement, Fermi surface mapping, and efficient spin analysis.
Conclusions:
- The ESPRESSO machine provides unprecedented capabilities for detailed spin electronic structure analysis.
- This instrument facilitates a comprehensive understanding of spin-dependent electronic properties in materials.
- The developed SARPES system is a significant advancement for research in condensed matter and materials science.
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