Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 34: Poster: Surface Dynamics & Electron-Driven Processes

O 34.5: Poster

Dienstag, 19. März 2024, 18:00–20:00, Poster C

Investigation of Ballistic Transport on Black Phosphorus with MONA — •Manuel Seitz, Andreas Christ, Emilian Eisermann, Patrick Härtl, Markus Leisegang, and Matthias Bode — Physikalisches Institut, Experimentelle Physik II, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany

Due to the ever-increasing miniaturization of electronic components, we are approaching a frontier where 2D-materials are promising for nanoscale electronic devices. One auspicious material is the semiconductor black phosphorus (BP) [1]. BP exhibits an anisotropic surface structure and shows a band gap that is influenced by the number of layers [1, 2]. The strong anisotropy as well as the possibility to tune the band gap are properties which may strongly impact the charge transport.
In this project, we aim to investigate surface transport in the ballistic regime of BP using the molecular nanoprobe (MONA) technique[4]. We thoroughly evaluated various cleaving techniques and investigated the resulting surfaces. Furthermore, single adatoms with bistable binding configurations are characterized [5]. In a proof-of-principle experiment we show that these bistable atoms can be used as detectors for MONA measurements.
[1] X. Ling et al., Proc. Natl. Acad. Sci. 112, 4523 (2015)
[2] J. Kim et al., Science 349, 723 (2015)
[3] Y. Du et al., J. Appl. Phys. 107, 093718 (2010)
[4] M. Leisegang et al., Nano Lett. 18, 2165 (2018)
[5] B. Kiraly et al., Nat. Commun. 9, 3904 (2018)

Keywords: Surface transport; Black phosphorus; Anisotropies; MONA; Atomic state switch