Ch. Strunk

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We have investigated the magnetoresistance of lithographically prepared single-layer graphene nanoribbons in pulsed, perpendicular magnetic fields up to 60 T and performed corresponding transport simulations using a tight-binding model and several types of disorder. In experiment, at high carrier densities we observe Shubnikov-de Haas oscillations and the(More)
A suspended, doubly clamped single wall carbon nanotube is characterized as driven nano-electromechanical resonator at cryogenic temperatures. Electronically, the carbon nanotube displays small bandgap behaviour with Coulomb blockade oscillations in electron conduction and transparent contacts in hole conduction. We observe the driven mechanical resonance(More)
A. Kumar,1,* M. Gaim,1 D. Steininger,1 A. Levy Yeyati,2 A. Martı́n-Rodero,2 A. K. Hüttel,1,† and C. Strunk1,‡ 1Institute for Experimental and Applied Physics, University of Regensburg, 93040 Regensburg, Germany 2Departamento de Fı́sica Teórica de la Materia Condensada, Condensed Matter Physics Center (IFIMAC) and Instituto Nicolás Cabrera, Universidad(More)
Conventional superconductors were long thought to be spin inert; however, there is now increasing interest in both (the manipulation of) the internal spin structure of the ground-state condensate, as well as recently observed long-lived, spin-polarized excitations (quasiparticles). We demonstrate spin resonance in the quasiparticle population of a(More)
The previously described apical pore of Polystictus versicolor can be shown also in surface replicas and total preparations of hyphae from a mycelium which had not been mechanically disrupted. The electron-optical demonstration of the pore depends on the orientation of the hyphal tip within the specimen, on the viability of the hyphae at the beginning of(More)
We present electronic transport measurements of a single wall carbon nanotube quantum dot coupled to Nb superconducting contacts. For temperatures comparable to the superconducting gap, peculiar transport features are observed inside the Coulomb blockade and superconducting energy gap regions. The observed temperature dependence can be explained in terms of(More)
F. Rohlfing,1 G. Tkachov,2,* F. Otto,1 K. Richter,2 D. Weiss,1 G. Borghs,3 and C. Strunk1 1Institute for Experimental and Applied Physics, Universität Regensburg, D-93040 Regensburg, Germany 2Institute for Theoretical Physics, Universität Regensburg, D-93040 Regensburg, Germany 3Interuniversity Micro-Electronics Center (IMEC), Kapeldreef 75a, B-3001 Leuven,(More)
As electrode material, a 10/40 nm Ti/Pt bilayer is patterned on top of a degenerately doped Si substrate with a 500 nm thick insulating capping layer, see Fig. S1. In order to avoid contamination of the CNT, we grow the carbon nanotube as a last fabrication step across the contact electrodes separated by a 1.2μm trench. The identification of a promising(More)
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