Gapped Excitations in the High-Pressure Antiferromagnetic Phase of URu$_2$Si$_2$
| Autor: | Williams, T. J., Barath, H., Yamani, Z., Rodriguez-Riviera, J. A., Leão, J. B., Garrett, J. D., Luke, G. M., Buyers, W. J. L., Broholm, C. |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 95, 195171 (2017) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.95.195171 |
| Popis: | We report a neutron scattering study of the magnetic excitation spectrum in each of the three temperature and pressure driven phases of URu$_2$Si$_2$. We find qualitatively similar excitations throughout the (H0L) scattering plane in the hidden order and large moment phases, with no changes in the $\hbar\omega$-widths of the excitations at the $\Sigma$ = (1.407,0,0) and $Z$ = (1,0,0) points, within our experimental resolution. There is, however, an increase in the gap at the $\Sigma$ point from 4.2(2) meV to 5.5(3) meV, consistent with other indicators of enhanced antiferromagnetism under pressure. Comment: 5 pages, 3 figures, 1 table |
| Databáze: | arXiv |
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