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Magnetic excitations in the quasi-one-dimensional magnet Sr0.73CuO2: Coexistence of the spin gap and long-range magnetic orderстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Meijer G.I., Eccleston R.S., Mutka H., Rossel C., Karpinski J., Kazakov S., Wachter P.
- Журнал: Physical Review B
- Том: 60
- Номер: 13
- Год издания: 1999
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 9260
- Последняя страница: 9263
- DOI: 10.1103/PhysRevB.60.9260
- Аннотация: We report on spin dynamics in the highly hole doped quasi-one-dimensional cuprate Sr0.73CuO2 measured by inelastic neutron scattering. An excitation mode with peaks at E=10 and 17.5 meV is observed in the spectrum. Additional magnetic scattering remains present up to E similar to 25 meV. These features are due to excitations of dimerized antiferromagnetic chains; the two peaks are associated with the dispersion of the lowest-lying magnon branch, whereas the scattering in the region up to E similar to 25 meV is consistent with an excitation continuum. The spin excitation gap Delta similar to 10 meV remains present below the long-range magnetic ordering temperature T-AF similar to 10 K; indicating coexistence of the quantum-mechanical singlet ground state and the classical Neel ordered state. This result shows that such coexistence is not restricted to the doped spin-Peierls system CuGeO3. [S0163-1829(99)03838-2].
- Добавил в систему: Казаков Сергей Михайлович