We performed zero-field muon spin rotation/relaxation (ZF-μSR) measurements on high-quality single-crystalline samples of Bi 1.76Pb0.35Sr1.89CuO6+δ [(Bi,Pb)2201] over a wide doping region controlled by oxygen depletion (δ). We find that there is no static magnetic order above ∼2 K in any of these samples including underdoped samples. The absence of slow antiferromagnetic fluctuation in the underdoped region allows reliable muon Knight shift measurements, which provides a direct evidence of reduced density of states at lower temperatures or "pseudogap".
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering