1997/11/12 by C. Morais Smith, Y. Dimashko, Yu. A. Dimashko +2 · 2 citations
Mathematics · Physics and Astronomy · #Antiferromagnetism #Classical mechanics #Condensed matter physics #Critical current #Doping #Dynamics (music) #Elasticity (physics) #Electric field #Equations of motion #Field (mathematics) #Impurity #Magnetic properties of thin films #Mathematics #Physics #Physics of Superconductivity and Magnetism #Pinning force #Quantum mechanics #Relaxation (psychology) #Theoretical and Computational Physics #Thermodynamics #cond-mat
paper · pdf · doi:10.1103/physrevb.58.453
22 pages, RevTeX, 3 PS-figures
arxiv created 1997/11/12 · openalex publication_date 1998/07/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the dynamics of the striped phase, which has previously been suggested to be the ground state of a doped antiferromagnet. Starting from the t\ensuremath-J model, we derive the classical equation governing the motion of the charged wall by using a fictitious spin model as an intermediate step. A wavelike equation of motion is obtained and the wall elasticity and mass density constants are derived in terms of the t and J parameters. The wall is then regarded as an elastic string that will be trapped by the pinning potential produced by randomly distributed impurities. We evaluate the pinning potential and estimate the threshold electric field that has to be applied to the system in order to release the walls. Besides, the dynamics of the stripe in the presence of a bias field below the threshold is considered and the high- and low-temperature relaxation rates are derived.