Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 33: Nanotubes and Nanoribbons
TT 33.5: Vortrag
Dienstag, 13. März 2018, 10:30–10:45, H 0110
Renormalization group study of competing low-temperature phases in single-wall carbon nanotubes — Wen-Min Huang1, •Junichi Okamoto2,3, and Ludwig Mathey2,3 — 1Department of Physics, National Chung-Hsing University, Taichung 40227, Taiwan — 2Zentrum für Optische Quantentechnologien and Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany — 3The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany
Carbon nanotubes (CNs) are intriguing one-dimensional systems where various electronic states emerge from their microscopic details. Examples are superconducting states in CNs embedded in a zeolite matrix [1], Mott insulating states in ultraclean CNs [2], and Wigner crystals in semiconducting CNs [3]. Here, we theoretically investigate the low-temperature phase diagrams of single-wall CNs by a renormalization group method. Important ingredients are: (i) electron-phonon interactions that may induce superconductivity or Peierls distortion and (ii) electronic correlations that may cause Mott insulating states. We discuss some preliminary consequences of the competition among these phases.
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