Observation of Self-binding in Monolayer $^3$He
| Autor: | Sato, D., Naruse, K., Matsui, T., Fukuyama, Hiroshi |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 109, 235306 (2012) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.109.235306 |
| Popis: | We report clear experimental signatures of the theoretically unexpected gas-liquid transition in the first three monolayers of $^3$He adsorbed on graphite. The transition is inferred from the linear density dependence of the $\gamma$-coefficient of the heat capacity measured in the degenerate region (2 $\le T \le$80 mK) below a critical liquid density ($\rho_{c0}$). Surprisingly, the measured $\rho_{c0}$ values (0.6$\sim$0.9 nm$^{-2}$) are nearly the same for all these monolayers in spite of their quite different environments. We conclude that the ground-state of $^3$He in strict two dimensions is not a dilute quantum gas but a self-bound quantum liquid with the lowest density ever found. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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