Direct measurement of the bulk spin structure of noncentrosymmetric BiTeCl

Gabriel Landolt,1,2 Sergey V. Eremeev,3,4,5 Oleg E. Tereshchenko,5,6,7 Stefan Muff,2,8 Konstantin A. Kokh,5,7,9 Jürg Osterwalder,1 Evgueni V. Chulkov,10 and J. Hugo Dil2,8 1Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland 2Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland 3Institute of Strength Physics and Materials Science, Russian Academy of Sciences, Siberian Branch, Akademicheskiy prospekt 2/4, Tomsk 634021, Russia 4Tomsk State University, Tomsk 634050, Russia 5Saint Petersburg State University, Saint Petersburg 198504, Russia 6Rzhanov Institute of Semiconductor Physics, Russian Academy of Sciences, Siberian Branch, prospekt Akademika Lavrenteva 13, Novosibirsk 630090, Russia 7Novosibirsk State University, Novosibirsk 636090, Russia 8Institut de Physique de la Matière Condensée, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland 9Sobolev Institute of Geology and Mineralogy, Russian Academy of Sciences, Siberian Branch, prospekt Koptyuga 3, Novosibirsk 630090, Russia 10Donostia International Physics Center (DIPC) and CFM-MPC, Centro Mixto CSIC-UPV/EHU, Departamento de Fı́sica de Materiales, UPV/EHU, E-20080 San Sebastián, Spain (Received 5 September 2014; revised manuscript received 20 December 2014; published 10 February 2015)