174 citations · 280 across the 3 of their papers we have counts for
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cond-mat.mtrl-sci2015★ 174 cited
Ultrafast helicity control of surface currents in topological insulators with near-unity fidelity
Christoph Kastl, Christoph Karnetzky, Helmut Karl +1
In recent years, a class of solid state materials, called three-dimensional topological insulators, has emerged. In the bulk, a topological insulator behaves like an ordinary insul…
cond-mat.mtrl-sci2012★ 17 cited
Ion beam synthesis of nanothermochromic diffraction gratings with giant switching contrast at telecom wavelengths
Johannes Zimmer, Achim Wixforth, Helmut Karl +1
Nanothermochromic diffraction gratings based on the metal-insulator transition of are fabricated by site-selective ion beam implantation in a matri…