Competing orders suppressed by disorder around a hidden quantum critical point in high- Tc cuprate superconductors
Year: 2010
Type: article
Abstract: We report extensive muon-spin-rotation measurements on the lightly doped ${\text{Y}}_{1\ensuremath{-}x}{\text{Ca}}_{x}{\text{Ba}}_{2}{\text{Cu}}_{3}{\text{O}}_{6+y}$ compound, which allows us to disentangle the effect of disorder, controlled by random ${\text{Ca}}^{2+}$ substitution, from that of mere doping. A three-dimensional phase diagram of lightly doped cuprates is accurately drawn. It shows a quantum critical point around which a thermally activated antiferromagnetic phase competes with superconductivity. Disorder suppresses both the competing order parameters and the quantum critical point, unveiling an underlying frozen state.
Source: Physical Review B
Language: Latvian
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1569891925