Reentrant pinning of a He3 overlayer in a He3−He4 mixture film
| Autor: | Masaru Suzuki, Ko Okamura, Junko Taniguchi, Mitsunori Hieda |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Condensed matter physics 02 engineering and technology Substrate (electronics) Quartz crystal microbalance 021001 nanoscience & nanotechnology 01 natural sciences Overlayer Superfluidity Reentrancy Condensed Matter::Superconductivity Metastability 0103 physical sciences Graphite 010306 general physics 0210 nano-technology Oscillation amplitude |
| Zdroj: | Physical Review B. 100 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.100.214508 |
| Popis: | We performed quartz crystal microbalance experiments for a $^{3}\mathrm{He}\text{\ensuremath{-}}^{4}\mathrm{He}$ mixture film on an exfoliated single-crystalline graphite using a 32-kHz quartz tuning fork. The decoupled $^{3}\mathrm{He}$ overlayer on the superfluid $^{4}\mathrm{He}$ layer shows a reentrant pinning at a certain temperature ${T}_{3d}$ under a large oscillation amplitude. The pinning state below ${T}_{3d}$ is metastable. After reducing the oscillation amplitude, the $^{3}\mathrm{He}$ overlayer relaxes to a stable pinning state via a depinning state. It is found that the reentrant pinning is triggered by a structure change of the underlying localized $^{4}\mathrm{He}$ layer on the oscillating substrate. |
| Databáze: | OpenAIRE |
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