Length-Dependent Conductance of a Spin-Incoherent Hubbard chain; Monte Carlo Calculations

Details Length-Dependent Conductance of a Spin-Incoherent Hubbard chain; Monte Carlo Calculations Length-Dependent Conductance of a Spin-Incoherent Hubbard chain; Monte Carlo Calculations

2006-09-28

arxiv.org/abs/cond-mat/0609742v2

Phys. Rev. Lett. 98, 166401 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

v2: New title and revised introduction. Improved extrapolation and error analysis. New data for Lw=2,4 in Fig5(a)

Scientific paper

10.1103/PhysRevLett.98.166401

The dc conductance of a short spin-incoherent Hubbard chain coupled to leads is investigated using quantum Monte Carlo calculations. In contrast with the Luttinger liquid regime, where the conductance is equal to the noninteracting value, the spin-incoherent regime displays a conductance that decreases rapidly with chain length down to a value of roughly 1.5e2/h for a four site chain followed by a slower decrease for longer chains. We also discuss the resistance contribution from scattering in the contacts.

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