Optical investigation of thermoelectric topological crystalline insulator Pb0:77Sn0:23Se

Anjan A. Reijnders, ∗ Jason Hamilton, Vivian Britto, Jean-Blaise Brubach, Pascale Roy, Quinn D. Gibson, R.J. Cava, and K. S. Burch † Department of Physics & Institute for Optical Sciences, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7, Canada. Synchrotron SOLEIL, L’Orme des Merisiers Saint-Aubin, 91192 Gif-sur-Yvette, France. Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA Department of Physics, Boston College, 140 Commonwealth Ave, Chestnut Hill, Massachusetts 02467, USA (Dated: August 4, 2014)