Pseudospin ferromagnetism in double-quantum-wire systems

Details Pseudospin ferromagnetism in double-quantum-wire systems Pseudospin ferromagnetism in double-quantum-wire systems

2005-01-28

arxiv.org/abs/cond-mat/0501694v2

Phys. Rev. Lett. 95, 086802 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

updated version

Scientific paper

10.1103/PhysRevLett.95.086802

We propose that a pseudospin ferromagnetic (i.e inter-wire coherent) state can exist in a system of two parallel wires of finite width in the presence of a perpendicular magnetic field. This novel quantum many-body state appears when the inter wire distance decreases below a certain critical value which depends on the magnetic field. We determine the phase boundary of the ferromagnetic phase by analyzing the softening of the spin-mode velocity using the bosonization approach. We also discuss signatures of this state in tunneling and Coulomb drag experiments.

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