Berlin 2015 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 88: Transport: Carbon Nanotubes
TT 88.5: Talk
Thursday, March 19, 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.