[Tu-P1-B] Novel technologies in 2D materials

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[Tu-P1-B-01] Imaging Transport Bottlenecks in Gapped Bilayer Graphene Using Excitonic Dielectric Sensing

〇David Tebbe¹, Sophia Lackhoff¹, Jonas Blum¹, Frank Volmer¹, Kenji Watanabe², Takashi Taniguchi³, Lutz Waldecker¹, Christoph Stampfer^1,4, Bernd Beschoten¹ (1. 2nd Inst. of Physics A and JARA-FIT, RWTH Aachen Univ., 52074 Aachen (Germany), 2. National Inst. for Materials Sci., 1-1 Namiki, Tsukuba, 305-0044 (Japan), 3. Int'l. Center for Materials Nanoarchitectonics, National Inst. for Materials Sci., 1-1 Namiki, Tsukuba, 305-0044 (Japan), 4. Peter Grünberg Inst. (PGI-9), Forschungszentrum Jülich, 52425 Jülich (Germany))

We employ monolayer WSe₂ excitons as a non-invasive dielectric sensor to image the local electrostatic potential in encapsulated bilayer graphene devices. Spatial maps under applied bias reveal disorder-induced transport bottlenecks that govern carrier flow through the gapped channel.