Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 70: Poster Wednesday: Electronic Structure
O 70.5: Poster
Mittwoch, 3. April 2019, 17:45–20:00, Poster B2
Scanning Tunneling Spectroscopy on the f-electron system Praseodymium Hexaboride — •Lisa Harmsen1, Philipp Buchsteiner1, Geetha Balakrishnan2, and Martin Wenderoth1 — 1IV. Physikalisches Institut, George-August Universität Göttingen, 37077 Göttingen, Germany — 2Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
The surfaces of f-electron systems like rare-earth hexaborides are prone to host correlation effects, such as heavy Dirac fermions [1]. While the Samarium Hexaboride surface have been studied in the past [2], only little is known about the electronic surface structure of the neighbouring f-electron system Praseodymium Hexaboride (PrB6). Here, we have investigated the (001)-cleavage plane of PrB6 with Scanning Tunneling Microscopy (STM) and Spectroscopy (STS) down to 8 K. The acquired data reveals non reconstructed areas as well as several surface reconstructions. In contrast to Photoemission Spectroscopy measurements [3], where a large surface area is mapped, we are able to resolve the electronic structure locally including the local structure as seen in constant current topographies. This opens a way to disentangle f-electron physics on the atomic scale. This work is supported by the DFG grant WE1889/10-1 and PR298/19-1. [1] H. Pirie et al., arXiv:1810.13419 [cond-mat.str-el] (2018) [2] S. Rößler et al., Philos. Mag., 96:31, 3262-3273 (2016) [3] S. Patil et al., J. Phys.: Condens. Matter 23, 495601 (2011)