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Coincidence detection probability of(γ,2e)photoemission measurement
Yuehua Su1, Kun Cao1, Chao Zhang1
1Department of Physics, Yantai University, Yantai 264005, People's Republic of China.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|September 23, 2024
Summary
The (gamma, 2e) photoemission technique detects two-body correlations in strongly correlated electrons. This method reveals the center-of-mass physics of electron pairs, crucial for understanding superconductors.
Area of Science:
- Condensed Matter Physics
- Quantum Many-Body Theory
Background:
- Direct detection of many-body correlations in strongly correlated electrons is a key challenge.
- The (gamma, 2e) photoemission technique probes two-body correlations.
Purpose of the Study:
- Focus on the (gamma, 2e) photoemission technique for correlated electrons near the Fermi energy.
- Investigate the capability of this technique in revealing two-body correlations.
Main Methods:
- Analyzing the coincidence detection probability in (gamma, 2e) photoemission.
- Relating the probability to the two-body Bethe-Salpeter wave function.
Main Results:
- The (gamma, 2e) technique is limited in resolving inner-pair structures due to electron-electron interactions.
- Distinct resolution of the center-of-mass momentum and energy of the two-body Bethe-Salpeter wave function is achieved.
Conclusions:
- The (gamma, 2e) photoemission technique provides insights into the center-of-mass physics of two-body correlations.
- This technique is a potential tool for studying Cooper pairs in superconductors.
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