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TT: Fachverband Tiefe Temperaturen

TT 88: Transport: Carbon Nanotubes

TT 88.5: Vortrag

Donnerstag, 19. März 2015, 10:30–10:45, A 053

Random Telegraph Noise in Carbon Nanotubes — •Sung ho Jhang¹, Hyun-jong Chung¹, and Yung woo Park² — ¹Konkuk University, Seoul, Korea — ²Seoul National University, Seoul, Korea

We have investigated random telegraph noise (RTN) observed in individual carbon nanotubes (CNTs). By analyzing the statistics and features of the RTN,we suggest that this noise originates from two different mechanisms; from the charge traps surrounding CNTs or from the random transition of defects within CNTs, activated by inelastic scattering with conduction electrons. The magnitude of resistance fluctuation is giant up to 60% of total resistance, much larger than inevitable thermal Nyquist noise. Due to the large RTN amplitude, the RTN approach could be developed into an effective probe to characterize single defects in CNTs. In addition, we show the RTN is sensitive to the encapsulated molecules inside CNTs, and report interacting noise behaviors.