Muon spin rotation measurements of heterogeneous field response in overdoped La2−xSrxCuO4

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 behavior is contrary to the canonical Fermi-liquid picture commonly associated with the overdoped cuprates and implies …