Dresden 2014 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 80: Transport: Carbon nanotubes (organized by TT)

HL 80.1: Talk

Wednesday, April 2, 2014, 16:30–16:45, HSZ 304

Revealing the carbon nanotube quantum dot fine structure by transport spectroscopy — •Daniel R. Schmid¹, Alois Dirnaichner^1,2, Magdalena Marganska², Peter L. Stiller¹, Milena Grifoni², Andreas K. Hüttel¹, and Christoph Strunk¹ — ¹Institute for Experimental and Applied Physics, University of Regensburg, 93040 Regensburg, Germany — ²Institute for Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany

Transport spectroscopy on an ultra-clean carbon nanotube quantum dot allows us to measure the level spectrum of the very first electron above the band gap, which can be understood by an underlying minimal Hamiltonian. This includes curvature induced spin-orbit coupling and KK’-mixing terms. The sample orientation in an external magnetic field can be adjusted from perpendicular to parallel alignment with the nanotube axis. Magnetic fields up to 17 T enable us to get an insight on the full dispersion of the first longitudinal modes.