Nuclear magnetism and electron order in interacting one-dimensional conductors

Bernd Braunecker*, Pascal Simon, Daniel Loss

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

96 Citations (Scopus)

Abstract

The interaction between localized magnetic moments and the electrons of a one-dimensional conductor can lead to an ordered phase in which the magnetic moments and the electrons are tightly bound to each other. We show here that this occurs when a lattice of nuclear spins is embedded in a Luttinger liquid. Experimentally available examples of such a system are single wall carbon nanotubes grown entirely from (13)C and GaAs-based quantum wires. In these systems the hyperfine interaction between the nuclear spin and the conduction electron spin is very weak; yet it triggers a strong feedback reaction that results in an ordered phase consisting of a nuclear helimagnet that is inseparably bound to an electronic density wave combining charge and spin degrees of freedom. This effect can be interpreted as a strong renormalization of the nuclear Overhauser field and is a unique signature of Luttinger liquid physics. Through the feedback the order persists up into the millikelvin range. A particular signature is the reduction in the electric conductance by the universal factor of 2.

Original languageEnglish
Article number165119
Number of pages28
JournalPhysical Review. B, Condensed matter and materials physics
Volume80
Issue number16
DOIs
Publication statusPublished - Oct 2009

Keywords

  • DOUBLE-QUANTUM DOTS
  • WALL CARBON NANOTUBES
  • SPIN-CHARGE SEPARATION
  • LUTTINGER-LIQUID
  • KONDO-LATTICE
  • RESONANCE
  • TRANSPORT
  • FERROMAGNETISM
  • SEMICONDUCTORS
  • SPECTROSCOPY

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