Nuclear magnetism and electronic order in 13C nanotubes.
Single wall carbon nanotubes grown entirely from 13C form an ideal system to study the effect of electron interaction on nuclear magnetism in one dimension. If the electrons are in the metallic, Luttinger liquid regime, we show that even a very weak hyperfine coupling to the 13C nuclear spins has a striking effect: The system is driven into an ordered phase, which combines electron and nuclear degrees of freedom, and which persists up into the millikelvin range. In this phase the conductance is reduced by a universal factor of 2, allowing for detection by standard transport experiments.
Braunecker
Bernd
B
Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland.
Simon
Pascal
P
Loss
Daniel
D