Applied Physics Express《应用物理快报》(月刊). Applied Physics Express (APEX) is a Letters journal devoted solely to rapid dissemination of up-to-date and concise reports on new findings in applied physics. The motto of APEX is high scientific quality and prompt publication. APEX is a sister journal of the Japanese Journal of Applied Physics (JJAP) and is published by IOP Publishing on behalf of the Japan Society of Applied Physics (JSAP)