Title: Forward Scattering from Photons in High Temperature Superconductions as a pathway to Increasing Tc

Abstract:
One of the primary goals of superconductivity research is engineering materials that become superconducting at high temperatures. In this context, the pnictide and cuprate superconductors have received an enormous amount of attention due to their large intrinsic values of Tc. The general consensus is that the high Tc’s observed in these unconventional superconductors are being driven by electronic repulsive interactions; however, I will argue that Tc can be significantly enhanced via electron-lattice interactions that are strongly peaked in the forward scattering direction. First I will present theory and ARPES data for such a scenario in the Bi family of high-Tc cuprates [1]. Then I will show that similar physics is at play in the recently discovered FeSe monolayer/STO film interface [2].
Electron-lattice interactions peaked in the forward scattering direction have the benefit of enhancing superconductivity in most pairing channels, even in cases where the gap symmetry is unconventional. Thus, forward scattering from phonons can be used as a pathway forward in designing superconductivity interfaces at increasing temperatures.

References:
[1] S. Johnston et al., Phys. Rev. Lett. 108, 166404 (2012).
[2] J. J. Lee et al., Nature 515, 245 (2014).