Field-driven transition in the Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ superconductor with splayed columnar defects

Akiyoshi Park, Sunseng Pyon, Kengo Ohara +5

Through 2.6 GeV U irradiations, we have induced bimodal splayed columnar defects in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ single crystals with splay angles, $\pm 5^{\circ }$, $\pm 10^{\circ }$,…