Crossover from ballistic to diffusive thermal transport in suspended graphene membranes

AE, FA and CMST acknowledge financial support from the FP7 project QUANTIHEAT (No. 604668) and the Spanish MICINN project PHENTOM (FIS2015-70862-P). ICN2 is supported by the Severo Ochoa program from Spanish MINECO (Grants No. SEV-2013-0295 and No. SEV-2017-0706) and by the CERCA programme/Generalitat de Catalunya. FK and BG acknowledge funding in through the H2020 European project CONNECT under the grant agreement number 688612 (www.connect-h2020.eu). FM acknowledges support by The Branco Weiss Fellowship–Society in Science administered by the ETH Zurich.