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Title: Electric field effect in ultrathin black phosphorus
Authors: Koenig, S.P.
Doganov, R.A.
Schmidt, H.
Castro Neto, A.H. 
Özyilmaz, B. 
Issue Date: 10-Mar-2014
Citation: Koenig, S.P., Doganov, R.A., Schmidt, H., Castro Neto, A.H., Özyilmaz, B. (2014-03-10). Electric field effect in ultrathin black phosphorus. Applied Physics Letters 104 (10) : -. ScholarBank@NUS Repository.
Abstract: Black phosphorus exhibits a layered structure similar to graphene, allowing mechanical exfoliation of ultrathin single crystals. Here, we demonstrate few-layer black phosphorus field effect devices on Si/SiO2 and measure charge carrier mobility in a four-probe configuration as well as drain current modulation in a two-point configuration. We find room-temperature mobilities of up to 300 cm2/Vs and drain current modulation of over 103. At low temperatures, the on-off ratio exceeds 105, and the device exhibits both electron and hole conduction. Using atomic force microscopy, we observe significant surface roughening of thin black phosphorus crystals over the course of 1 h after exfoliation. © 2014 AIP Publishing LLC.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/1.4868132
Appears in Collections:Staff Publications

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