IQIM Postdoctoral and Graduate Student Seminar

Abstract: I will describe a tight-binding lattice model of fermions with repulsive interactions that exhibits unconventional superconductivity (beyond BCS theory). The primary advantage of the model is its simplicity and analytical tractability. The model resembles a trilayer system composed of an ideal dielectric sandwiched between two metals. In the strong coupling limit, the model reduces to a superconducting hard-core Bose-Hubbard model. Above the superconducting critical temperature, an analog of pseudo-gap physics results where the fermions remain Cooper paired with a large single-particle energy gap. The talk will be based on arXiv:1805.05331 and recent developments. Connections will also be made to a recent carbon nanotube experiment (arXiv:1608.05721).