Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session S15: 2D Materials (Semiconductors) -- Emerging Materials I
11:15 AM–2:15 PM,
Thursday, March 7, 2019
BCEC
Room: 154
Sponsoring
Units:
DMP DCOMP
Chair: Kristie Koski, University of California, Davis
Abstract: S15.00006 : Prolonged photo-carriers generated in Black Phosphorus
(Author Not Attending)
Presenter:
Munisa Nurmamat
(Department of Physics Science, Graduate School of Science, Hiroshima University, Japan)
Authors:
Munisa Nurmamat
(Department of Physics Science, Graduate School of Science, Hiroshima University, Japan)
Yukiaki Ishida
(Institute for Solid State Physics, the University of Tokyo, Japan)
Ryohei Yori
(Department of Physics Science, Graduate School of Science, Hiroshima University, Japan)
Kazuki Sumida
(Department of Physics Science, Graduate School of Science, Hiroshima University, Japan)
Siyuan Zhu
(Department of Physics Science, Graduate School of Science, Hiroshima University, Japan)
Masashi Nakatake
(Aichi Synchrotron Radiation Center, Aichi Science & Technology Foundation, Japan)
Yoshifumi Ueda
(Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan)
Masaki Taniguchi
(Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan)
Shik Shin
(Institute for Solid State Physics, the University of Tokyo, Japan)
Yuichi Akahama
(Graduate School of Material Science, University of Hyogo, Japan)
Akio Kimura
(Department of Physics Science, Graduate School of Science, Hiroshima University, Japan)
Here we employ time-resolved ARPES to explore the dynamics of photo-generated carriers in BP. The electronic structure above the Fermi level has been clearly observed, where a massive-and-anisotropic Dirac-type dispersions are confirmed. Importantly, we have directly observe that the photo-carriers generated across the direct band gap have the life time exceeding 400 ps. Such a long duration can be attributed to the stabilized e-h pairs between conduction and valence bands and confirms that the BP is a suitable platform for excitonic condensations.
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