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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Spin and energy analyzed photoemission: a feasibility analysis
D T Pierce1, C E Kuyatt, R J Celotta
1National Bureau of Standards, Washington, D.C. 20234, USA.
The Review of Scientific Instruments
|November 1, 1979
Summary
Spin and energy analyzed photoemission offers new ways to study surface magnetism. This research details a feasible experimental setup and suggests configurations to improve signal count rates.
Area of Science:
- Surface science
- Condensed matter physics
- Quantum mechanics
Background:
- Investigating surface magnetism is crucial for understanding materials.
- Photoemission techniques offer insights into electronic and magnetic properties.
- Analyzing both electron spin and energy provides a more complete picture.
Purpose of the Study:
- To explore the potential of spin and energy analyzed photoemission for surface magnetism studies.
- To assess the feasibility of a specific experimental setup.
- To identify methods for enhancing signal count rates in such experiments.
Main Methods:
- Application of electron-optical conservation laws and phase space concepts.
- Feasibility analysis of an experimental setup including a photoemitter in a magnetic field, photoelectron energy analyzer, and electron spin analyzer.
- Calculation of signal count rate for photoemission from a Ni crystal using He I resonance radiation.
Main Results:
- A signal count rate of approximately 220 counts/s was calculated for a typical experimental setup.
- Potential methods to increase the count rate by orders of magnitude were identified.
- A novel experimental configuration was proposed to mitigate count rate reduction caused by magnetic fields.
Conclusions:
- Spin and energy analyzed photoemission is a promising technique for surface magnetism research.
- The proposed experimental configuration offers a viable approach with potential for significant improvements in signal detection.
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