Volume 35, Number 8, September II 1996
|Page(s)||603 - 608|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
The annealed positions of ferromagnetic bonds doped into a 2D antiferromagnet
Department of Physics, Queen's University - Kingston,
Ontario K7L 3N6, Canada
Accepted: 17 July 1996
We determine where a given concentration of ferromagnetic (FM) bonds doped into a square lattice antiferromagnet must go to minimize the system's total magnetic energy. We find i) an infinite degeneracy of ground-state arrangements of FM bonds that correspond to completely unfrustrated configurations for classical spins, and ii) this degeneracy is lifted when quantum fluctuations are included, and phase-separated ground states, such as periodic arrays of stripes of FM bonds, are found. A discussion of the application of these ideas to doped cuprate high-Tc superconductors with annealed disorder is presented.
PACS: 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) / 71.10.-w – Theories and models of many electron systems
© EDP Sciences, 1996
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.