Direct correlation of crystal structure and optical properties in wurtzite/zinc-blende GaAs nanowire heterostructures

Martin Heiss,1,2 Sonia Conesa-Boj,2,3 Jun Ren,4 Hsiang-Han Tseng,4 Adam Gali,5 Andreas Rudolph,6 Emanuele Uccelli,1,2 Francesca Peiró,3 Joan Ramon Morante,7,3 Dieter Schuh,6 Elisabeth Reiger,6 Efthimios Kaxiras,4 Jordi Arbiol,8 and Anna Fontcuberta i Morral1,2,* 1Walter Schottky Institut and Physik Department, Technische Universität München, Am Coulombwall 3, D-85748 Garching, Germany 2Laboratoire des Matériaux Semiconducteurs, Institut des Matériaux, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland 3Departament d’Electrònica,Universitat de Barcelona, E-08028 Barcelona, Catalonia, Spain 4Laboratory for Multiscale Modeling of Materials, Institut des Matériaux, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland 5Department of Atomic Physics, Budapest University of Technology and Economics, Budafoki út 8., H-1111, Budapest, Hungary 6Institute for Experimental and Applied Physics, University of Regensburg, Universitätsstrasse 31, D-93053 Regensburg, Germany 7Catalonia Institute for Energy Research (IREC), E-08019 Barcelona, Catalonia, Spain 8Institució Catalana de Recerca i Estudis Avançats (ICREA) and Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Cientı́ficas (CSIC), E-08193 Bellaterra, Catalonia, Spain (Received 12 July 2010; revised manuscript received 28 September 2010; published 20 January 2011)