التفاصيل البيبلوغرافية
| العنوان: |
Magnetoelastic Excitations in the Pyrochlore Spin Liquid Tb2Ti2O7. |
| المؤلفون: |
Fennell, T.1 tom.fennell@psi.ch, Kenzelmann, M.2, Roessli, B.1, Mutka, H.3, Ollivier, J.3, Ruminy, M.1, Stuhr, U.1, Zaharko, O.1, Bovo, L.4, Cervellino, A.5, Haas, M. K.6,7, Cava, R. J.6 |
| المصدر: |
Physical Review Letters. Jan2014, Vol. 112 Issue 1, p1-1. 1p. |
| مصطلحات موضوعية: |
*MAGNETOELASTIC effects, *PYROCHLORE, *NUCLEAR spin, *TERBIUM, *ACOUSTIC phonons, *NEUTRON scattering, *LOW temperatures |
| مستخلص: |
At low temperatures, Tb2Ti2O7 enters a spin liquid state, despite expectations of magnetic order and/or a structural distortion. Using neutron scattering, we have discovered that in this spin liquid state an excited crystal field level is coupled to a transverse acoustic phonon, forming a hybrid excitation. Magnetic and phononlike branches with identical dispersion relations can be identified, and the hybridization vanishes in the paramagnetic state. We suggest that Tb2Ti2O7 is aptly named a "magnetoelastic spin liquid" and that the hybridization of the excitations suppresses both magnetic ordering and the structural distortion. The spin liquid phase of Tb2Ti2O7 can now be regarded as a Coulomb phase with propagating bosonic spin excitations. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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