A ferroelectric quantum phase transition inside the superconducting dome of Sr1-xCaxTiO3-[delta]

Carl Willem Rischau,Xiao Lin,Christoph P. Grams,Dennis Finck,Steffen Harms,Johannes Engelmayer,Thomas Lorenz,Yann Gallais,Benoît Fauqué,Joachim Hemberger,Kamran Behnia

A ferroelectric quantum phase transition inside the superconducting dome of Sr1-xCaxTiO3-[delta]

2017

Carl Willem Rischau
Xiao Lin
Christoph P. Grams
Dennis Finck
Steffen Harms
Johannes Engelmayer
Thomas Lorenz
Yann Gallais
Benoît Fauqué
Joachim Hemberger
Kamran Behnia

Slight changes in SrTiO’s nominal composition make it superconducting or ferroelectric. A compositional window for which the two phases exist is now reported; varying the fraction of Ca replacing Sr changes the superconducting critical temperature.

Keywords:

Condensed matter physics
Delta
Physics
Critical point (thermodynamics)
Quantum phase transition
Superconductivity
Ferroelectricity
Dome
superconducting critical temperature

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