Cs encapsulation and interacting noise sources in carbon nanotubesSung Won Kim D Division of Quantum Phases and Devices, School of Physics, Konkuk University, Seoul 143-701, Republic of KoreaTae Woo Uhm D Division of Quantum Phases and Devices, School of Physics, Konkuk University, Seoul 143-701, Republic of KoreaYoung Gyu You D Division of Quantum Phases and Devices, School of Physics, Konkuk University, Seoul 143-701, Republic of Korea

摘要

We study the effect of Cs encapsulation on the transport and noise properties of carbon nanotubes, and report very large two-level current fluctuations observed in the time-traces of the current at low temperatures. When several two-level fluctuations are active at the same time, we find they are interacting each other. Observed noise behaviors are attributed to the movable cluster of Cs ions encapsulated in the carbon nanotube.