Muon Spin Rotation Measurements of Heterogeneous Field Response in Overdoped La2-xSrxCuO4

Details Muon Spin Rotation Measurements of Heterogeneous Field Response in Overdoped La2-xSrxCuO4 Muon Spin Rotation Measurements of Heterogeneous Field Response in Overdoped La2-xSrxCuO4

2008-05-24

arxiv.org/abs/0805.3779v2

Phys. Rev. B 81, 014508 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures; substantial changes; To be published in Physical Review B

Scientific paper

10.1103/PhysRevB.81.014508

Transverse-field muon spin rotation measurements of overdoped La2-xSrxCuO4 reveal a large broadening of the local magnetic field distribution in response to applied field, persisting to high temperatures. The field-response is approximately Curie-Weiss like in temperature and is largest for the highest doping investigated. Such behaviour is contrary to the canonical Fermi-liquid picture commonly associated with the overdoped cuprates and implies extensive heterogeneity in this region of the phase diagram. A possible explanation for the result lies in regions of staggered magnetization about dopant cations, analogous to what is argued to exist in underdoped systems.

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