Charles Gould³, Hartmut Buhmann³, Wouter Beugeling³, Giorgio Sangiovanni⁶, Domenico Di Sante^7,8, Gianni Profeta², Laurens W. Molenkamp³, Hendrik Bentmann^1,*, and Friedrich Reinert¹

• ¹Experimentelle Physik VII and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
• ²Department of Physical and Chemical Sciences and SPIN-CNR, University of L'Aquila, Via Vetoio 10, I-67100 L'Aquila, Italy
• ³Faculty for Physics and Astronomy (EP3), Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany and Institute for Topological Insulators, Am Hubland, D-97074 Würzburg, Germany
• ⁴Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
• ⁵Experimental Physics IV and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
• ⁶Institut für Theoretische Physik und Astrophysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, 97074 Würzburg, Germany
• ⁷Department of Physics and Astronomy, University of Bologna, 40127 Bologna, Italy
• ⁸Center for Computational Quantum Physics, Flatiron Institute, 162 5th Avenue, New York, New York 10010, USA

• ^*Hendrik.Bentmann@physik.uni-wuerzburg.de; Present address: Department of Physics, Center for Quantum Spintronics, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.