標題: Charge order and low frequency spin dynamics in lanthanum cuprates revealed by Nuclear Magnetic Resonance
作者: Grafe, H. -J.
Curro, N. J.
Young, B. L.
Vyalikh, A.
Vavilova, J.
Gu, G. D.
Huecker, M.
Buechner, B.
電子物理學系
Department of Electrophysics
公開日期: 1-Oct-2010
摘要: We report detailed O-17, La-139, and Cu-63,Cu-65 Nuclear Magnetic Resonance (NMR) and Nuclear Quadrupole Resonance (NQR) measurements in a stripe ordered La1.875Ba0.125CuO4 single crystal and in oriented powder samples of La1.8-x Eu0.2Sr (x) CuO4. We observe a partial wipeout of the O-17 NMR intensity and a simultaneous drop of the O-17 electric field gradient (EFG) at low temperatures where the spin stripe order sets in. In contrast, the Cu-63,Cu-65 intensity is completely wiped out at the same temperature. The drop of the O-17 quadrupole frequency is compatible with a charge stripe order. The O-17 spin lattice relaxation rate shows a peak similar to that of the La-139, which is of magnetic origin. This peak is doping dependent and is maximal at x a parts per thousand 1/8.
URI: http://dx.doi.org/10.1140/epjst/e2010-01299-6
http://hdl.handle.net/11536/150102
ISSN: 1951-6355
DOI: 10.1140/epjst/e2010-01299-6
期刊: EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
Volume: 188
起始頁: 89
結束頁: 101
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