Author Correction: Superconductivity mediated by polar modes in ferroelectric metals.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Superconductivity mediated by polar modes in ferroelectric metals.

The occurrence of superconductivity in doped SrTiO at low carrier densities points to the presence of an unusually strong pairing interaction that has eluded understanding for several decades. We report experimental results showing the pressure dependence of the superconducting transition temperature, T, near to optimal doping that sheds light on the nature of this interaction. We find that T increases dramatically when the energy gap of the ferroelectric critical modes is suppressed, i.

Large variations in the magnetic ordering behavior of EuCu(2)As(2) with the application of external pressure and magnetic field.

The influence of external pressure on the electrical transport and magnetic properties of EuCu(2)As(2), crystallizing in a ThCr(2)Si(2)-type structure, is reported. The system is known to be an antiferromagnet below T(N) ≈ 15 K in the absence of external magnetic fields. We find that there is a gradual reduction of T(N) with the application of a magnetic field with an extrapolated value of the critical field of around 18 kOe which can drive T(N) to zero.

Effects of Ru doping on the transport and magnetic properties of a La 1.32 Sr 1.68 Mn 2-y Ru y O 7 layered manganite system.

The low temperature magnetization, specific heat, electrical resistance and magnetoresistance have been studied for the Ru-doped La(1.32)Sr(1.68)Mn(2 - y)Ru(y)O(7) (y = 0.