[22p-C106-1~16] 12.2 Characterization and Materials Physics

[22p-C106-12] Anisotropic many-body interactions in organic molecular crystal rubrene

〇Keisuke Fukutani^1,2, Daijiro Okaue³, Ken-ichi Fukui^3,1, Hiroyuki Ishii⁴, Yuri Hasegawa⁵, Kiyohisa Tanaka^1,2, Satoshi Kera^1,2 (1.IMS, 2.SOKENDAI, 3.Osaka Univ., 4.Tsukuba Univ., 5.Ritsumeikan Univ.)

Keywords:rubrene, Photoemission spectroscopy, Electron-phonon coupling

We have utilized angle-resolved photoemission spectroscopy (ARPES) to investigate the quasiparticle band structure of rubrene single crystal, with the aim of understanding its anisotropic polaron conductions. Our results shows the magnitude of intra-band gap induced by the electron-molecular vibration interactions discernably decreases at certain wavevectors, compared to the Γ-Y high-mobility direction. At this presentation, we will discuss on the possible origins of such inhomogeneity of many-body interactions in the momentum space.