Low temperature nanoscale electronic transport on the MoS2 surface

Two-probe electronic transport measurements on a Molybdenum Disulphide (MoS2) surface were performed at low temperature (30 K) under ultra-high vacuum conditions. Two scanning tunneling microscope tips were precisely positioned in tunneling contact to measure the surface current-voltage characterist...

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Veröffentlicht in:Applied physics letters 2013-08, Vol.103 (8)
Hauptverfasser: Thamankar, R., Yap, T. L., Goh, K. E. J., Troadec, C., Joachim, C.
Format: Artikel
Sprache:eng
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Zusammenfassung:Two-probe electronic transport measurements on a Molybdenum Disulphide (MoS2) surface were performed at low temperature (30 K) under ultra-high vacuum conditions. Two scanning tunneling microscope tips were precisely positioned in tunneling contact to measure the surface current-voltage characteristics. The separation between the tips is controllably varied and measured using a high resolution scanning electron microscope. The MoS2 surface shows a surface electronic gap (ES) of 1.4 eV measured at a probe separation of 50 nm. Furthermore, the two- probe resistance measured outside the electronic gap shows 2D-like behavior with the two-probe separation.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4818998