ISIS Neutron and Muon Source Data Journal

Photo-muSR study of the shallow muonium state in CdS

Abstract: In cadmium sulfide, shallow donor muonium (Mu) centers can be formed and stabilized in low temperatures. They are characterized by hyperfine (HF) constants typically on the order of 0.1~MHz. This is significantly smaller than the HF constants of Mu in other semiconductor systems. Hence, electron orbitals of shallow Mu are quite dilated, with their Bohr radius in the range of a few nm. This size is significantly larger than other Mu species studied in traditional semiconductors. Hence, it is readily anticipated that their interaction with charge carriers is also different, presumably having a greater sensitivity due to the physical size. This is an intriguing problem in Mu studies that have never been addressed. In this proposal, we aim to observe Mu in CdS undergoing spin and charge exchange interaction with optically injected free carriers.

Experimenter: Dr P.W. Mengyan
Experimenter: Dr Brittany Baker
Experimenter: Ms Anup Yadav
Experimenter: Dr Rui Vilao
Experimenter: Dr James Lord
Experimenter: Professor Joao Gil
Local Contact: Dr Koji Yokoyama

DOI: 10.5286/ISIS.E.RB2520002

ISIS Experiment Number: RB2520002

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr P.W. Mengyan et al; (2026): Photo-muSR study of the shallow muonium state in CdS, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2520002

Data is released under the CC-BY-4.0 license.