Gap States of a Polyethylene Model Oligomer Observed by Using High-Sensitivity Ultraviolet Photoelectron Spectroscopy. - Yuki Yamaguchi; Kohei Shimizu; Atsushi Matsuzaki; Daisuke Sano; Tomoya Sato; Yuya Tanaka; Hisao Ishii (IEICE Trans. Electron., 2019)