Transport and magnetic properties ofTl2Ba2CuO6+δshowing a δ-dependent gradual transition from an 85-K superconductor to a nonsuperconducting metal
Citations Over TimeTop 1% of 1991 papers
Abstract
Transport and magnetic properties are investigated for ${\mathrm{Tl}}_{2}$${\mathrm{Ba}}_{2}$${\mathrm{CuO}}_{6+\mathrm{\ensuremath{\delta}}}$, which shows a gradual transition from an 85-K superconductor to a nonsuperconducting normal metal, as the excess oxygen content \ensuremath{\delta} is increased from \ensuremath{\sim}0 to \ensuremath{\sim}0.1. Hall measurements demonstrate that this transition arises from an overdoping of the hole carriers by excess oxygen. The temperature dependence of the resistivity is well fitted to a power-law dependence for all \ensuremath{\delta}'s, while the exponent shows a systematic change from linear (\ensuremath{\delta}\ensuremath{\sim}0) to quadratic (\ensuremath{\delta}\ensuremath{\sim}0.1) dependence. No significant changes of the Hall coefficient nor spin susceptibility are observed at the superconductor-metal phase boundary, suggesting a similarity and continuity between both the electronic structures. This is in sharp contrast to the previous observations for ${\mathrm{La}}_{2\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Sr}}_{\mathit{x}}$${\mathrm{CuO}}_{4}$.
Related Papers
- → Electrical resistivity of TiB2 at elevated pressures and temperatures(1996)24 cited
- → Anomalous electrical resistivity of thin gadolinium films(1974)22 cited
- → Electrical resistivity of amorphous Ni80−xMxB16Si4 alloys(1982)10 cited
- → Electrical resistivity of REAl6Fe6compounds (RE=Y, Gd, Tb, Dy, Ho, and Er)(1988)3 cited
- → Some Considerations on the Apparent Resistivity in the Cross Hole Resistivity Method(2001)