Superconductivity from purely repulsive forces

S. Raghu, Steven Allan Kivelson

Anonymous

J. M. Luttinger

A new mechanism which leads to superconductivity even for particles with purely repulsive forces between them is described. The general theory is given for weak short-ranged pair forces between the particles and for arbitrary (convex) Fermi surfaces. It is shown that the transition temperature due to this mechanism is in general quite low, though it may be enhanced somewhat by very special Fermi-surface geometry.

Hideo Aoki

Jun'ichi Osada, Y. Hama, D. M. Redondo

Rahul Nandkishore, Ronny Thomale, Andrey V. Chubukov

The authors examine thoroughly the general cases in which superconductivity can arise on a hexagonal lattice with purely repulsive bare interactions, and find superconducting phases with unusual symmetries: $f$- and chiral $d+i\phantom{\rule{0}{0ex}}d$-wave.