Electronic properties of telescoping carbon nanotubes under external fields |
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| Authors: | TS Li CH Lee SC Chang MF Lin |
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| Institution: | 1. Department of Electrical Engineering, Kun Shan University, 710 Tainan, Taiwan, ROC;2. Department of Physics, National Cheng Kung University, 701 Tainan, Taiwan, ROC;1. School of Materials Science and Engineering, Bengal Engineering and Science University, Shibpur, Howrah 711103, India;2. Nano-Structured Materials Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India;3. Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India;4. CSIR-Network Institute for Solar Energy (CSIR – NISE), New Delhi, India;1. Chemistry Division, School of Physical Sciences and Computing, University of Central Lancashire, Preston, Lancashire PR1 2HE, United Kingdom;2. Department of Chemistry, FEPS, University of Surrey, Guildford, United Kingdom;1. Department of Grain Science and Industry, Kansas State University, Manhattan, KS 66506, United States;2. Frito-Lay North America, Plano, TX 75024, United States;1. Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran;2. Department of Physics, West Tehran Branch, Islamic Azad University, Tehran, Iran;3. Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran |
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| Abstract: | In this work, we use the tight-binding model to study the low-energy electronic properties of telescoping double-walled carbon nanotubes subject to the influences of a transverse electric field and a parallel magnetic field. The state energy and energy spacings are found to oscillate significantly with the overlapping length. External fields would modify the state energies, alter the energy gaps, and destroy the state degeneracy. Complete energy gap modulations can be accomplished either by varying the overlapping length, or by applying an electric field or a magnetic field. The variations of state energies with the external fields will be directly reflected in the density of states. The numbers, heights, and frequencies of the density of states peaks are strongly dependent on the external fields. |
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