| Issue |
EPL
Volume 94, Number 2, April 2011
|
|
|---|---|---|
| Article Number | 26001 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/94/26001 | |
| Published online | 15 April 2011 | |
Localization of muonium atoms in KCl at low temperature
1
National Research Center “Kurchatov Institute” - Kurchatov Square 1, Moscow 123182, Russia
2
Department of Physics and Astronomy, University of British Columbia - Vancouver, British Columbia, Canada V6T 1Z1
3
Physik-Institut der Universität Zürich - CH-8057 Zürich, Switzerland
4
ISIS Facility, Rutherford Appleton Laboratory - Oxfordshire OX11 OQX, UK, EU
Received:
31
January
2011
Accepted:
15
March
2011
Muonium (μ+e− or Mu) atoms have long been believed to exhibit band-like propagation at low temperatures in ionic insulators and semiconductors. However, new muon spin relaxation measurements in transverse magnetic field reveal strong localization of Mu atoms at low temperatures in the ionic insulator KCl, similar to that observed in van der Waals cryocrystals. This discrepancy with previous results challenges our understanding of muonium quantum dynamics in solids: can Mu atoms ever truly delocalize at low temperature, or is low-temperature Mu localization a universal phenomenon?
PACS: 66.35.+a – Quantum tunneling of defects / 66.30.J- – Diffusion of impurities / 76.75.+i – Muon spin rotation and relaxation
© EPLA, 2011
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