Superconducting Penetration Depth Through a Van Hove Singularity: Sr${}_2$RuO${}_4$ Under Uniaxial Stress

Eli Mueller, Yusuke Iguchi, Fabian Jerzembeck +12

In the unconventional superconductor Sr${}_2$RuO${}_4$, uniaxial stress along the $[100]$ direction tunes the Fermi level through a Van Hove singularity (VHS) in the density of states,…