Momentum-resolved tunneling between Luttinger liquids

Details Momentum-resolved tunneling between Luttinger liquids Momentum-resolved tunneling between Luttinger liquids

2001-03-08

arxiv.org/abs/cond-mat/0103193v1

Phys. Rev. B 66, 153304 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures (1 in color)

Scientific paper

10.1103/PhysRevB.66.153304

We study tunneling between two nearby cleaved edge quantum wires in a perpendicular magnetic field. Due to Coulomb forces between electrons, the wires form a strongly-interacting pair of Luttinger liquids. We calculate the low-temperature differential tunneling conductance, in which singular features map out the dispersion relations of the fractionalized quasiparticles of the system. The velocities of several such spin-charge separated excitations can be explicitly observed. Moreover, the proposed measurement directly demonstrates the splintering of the tunneling electrons into a multi-particle continuum of these quasiparticles, carrying separately charge from spin. A variety of corrections to the simple Luttinger model are also discussed.

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