Stripes: Why hole rich lines are antiphase domain walls?

Abstract

For stripes of hole rich lines in doped antiferromagnets, we investigate the competition between anti-phase and in-phase domain wall ground state configurations. We argue that a phase transition must occure as a function of the electron/hole filling fraction of the domain wall. Due to {\em transverse} kinetic hole fluctuations, empty domain walls are always anti-phase. At arbitrary electron filling fraction ($\delta$) of the domain wall (and in particular for $\delta \approx 1/4$ as in LaNdSrCuO), it is essential to account also for the transverse magnetic interactions of the electrons and their mobility {\em along} the domain wall. We find that the transition from anti-phase to in-phase stripe domain wall occurs at a critical filling fraction $0.28<{\delta }_c<0.30$, for any value of $\frac{J}{t}<1/3$. We further use our model to estimate the spin-wave velocity in a stripe system. Finally, relate the results of our microscopic model to previous Landau theory approach to stripes.

11 pages, 3 figures

References in corpus (2)

• Metallic stripe in two dimensions: stability and spin-charge separation
• Topological doping and the stability of stripe phases

Cited by in corpus (7)

• Dynamical layer decoupling in a stripe-ordered, high T_c superconductor
• Anisotropic Magnetoresistance in Lightly Doped La_{2-x}Sr_{x}CuO_{4}: Impact of Anti-Phase Domain Boundaries on the Electron Transport
• Thermal Conductivity of Pr_{1.3-x}La_{0.7}Ce_xCuO_4 Single Crystals and Signatures of Stripes in an Electron-Doped Cuprate
• Band structure of Charge Ordered Doped Antiferromagnets
• Modelling Magnetic Fluctuations in the Stripe Ordered State
• Pairing and Density Correlations of Stripe Electrons in a Two-Dimensional Antiferromagnet
• Low-energy Effective Theory for Spin Dynamics of Fluctuating Stripes