| Autor: |
Shin, Jaeho, Choi, Jaewon, Shirahama, Keiya, Kim, Eunseong |
| Rok vydání: |
2016 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 93, 214512 (2016) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.93.214512 |
| Popis: |
We investigate the origin of a resonant period drop of a torsional oscillator (TO) containing solid ${}^{4}$He by inspecting its relation to a change in elastic modulus. To understand this relationship directly, we measure both phenomena simultaneously using a TO with a pair of concentric piezoelectric transducers inserted in its annulus. Although the temperature, ${}^{3}$He concentration, and frequency dependence are essentially the same, a marked discrepancy in the drive amplitude dependence is observed. We find that this discrepancy originates from the anisotropic response of polycrystalline solid ${}^{4}$He connected with low-angle grain boundaries by studying the shear modulus parallel to and perpendicular to the driving direction. |
| Databáze: |
arXiv |
| Externí odkaz: |
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