Los Alamos National Laboratory - Center for Integrated Nanotechnologies, Government of the United States of America - Center for Nanoscale Materials, Los Alamos National Laboratory - Center for Integrated Nanotechnologies, Academia Sinica - Research Center for Applied Sciences, National Taiwan University - Center for Condensed Matter Sciences, Los Alamos National Laboratory - Center for Integrated Nanotechnologies, Academia Sinica - Research Center for Applied Sciences, National Taiwan University - Center for Condensed Matter Sciences, Los Alamos National Laboratory - Center for Integrated Nanotechnologies, Argonne National Laboratory - Center for Nanoscale Materials and Los Alamos National Laboratory