Ultra compact multitip scanning tunneling microscope with a diameter of 50 mm

Vasily Cherepanov; Evgeny Zubkov; Hubertus Junker; Stefan Korte; Marcus Blab; Peter Coenen; Bert Voigtländer

doi:10.1063/1.3694990

Ultra compact multitip scanning tunneling microscope with a diameter of 50 mm

Rev Sci Instrum. 2012 Mar;83(3):033707. doi: 10.1063/1.3694990.

Authors

Vasily Cherepanov¹, Evgeny Zubkov, Hubertus Junker, Stefan Korte, Marcus Blab, Peter Coenen, Bert Voigtländer

Affiliation

¹ Peter Grünberg Institut, Forschungszentrum Jülich, 52425 Jülich, Germany.

PMID: 22462929
DOI: 10.1063/1.3694990

Abstract

We present a multitip scanning tunneling microscope (STM) where four independent STM units are integrated on a diameter of 50 mm. The coarse positioning of the tips is done under the control of an optical microscope or scanning electron microscopy in vacuum. The heart of this STM is a new type of piezoelectric coarse approach called KoalaDrive. The compactness of the KoalaDrive allows building a four-tip STM as small as a single-tip STM with a drift of less than 0.2 nm/min at room temperature and lowest resonance frequencies of 2.5 kHz (xy) and 5.5 kHz (z). We present as examples of the performance of the multitip STM four point measurements of silicide nanowires and graphene.