Abstract
We have performed several high-pressure electrical resistance experiments on (Bi2212), an insulating parent compound of the high- Bi2212 family of copper oxide superconductors. We find a resistive anomaly, a downturn at low temperature, that onsets with applied pressure in the 20–40 kbar range. Through both resistance and magnetoresistance measurements, we identify this anomaly as a signature of induced superconductivity. Resistance to higher pressures decreases , giving a maximum of . The higher pressure measurements exhibit a strong sensitivity to the hydrostaticity of the pressure environment. We make comparisons to the pressure-induced superconductivity now ubiquitous in the iron arsenides.
- Received 19 February 2010
DOI:https://doi.org/10.1103/PhysRevB.81.184509
©2010 American Physical Society