Hidden Symmetries in Nano-magnets
Mesoscale and Nanoscale Physics
2007-05-23 v1 Statistical Mechanics
Abstract
The hidden symmetry of certain nano-magnets leads to many of the levels being doubly degenerate for periodic values of the Zeeman energy. Corresponding to such a symmetry is an operator, , related to the time reversal operator, and which commutes with the Hamiltonian. The degeneracies for whole integer spin values are often similar to the Kramer's degeneracy for half-integer spin. An all algebraic method for constructing Hamiltonians with such hidden symmetries and different crystal symmetries is described.
Keywords
Cite
@article{arxiv.cond-mat/0112398,
title = {Hidden Symmetries in Nano-magnets},
author = {M. Preda and S. E. Barnes},
journal= {arXiv preprint arXiv:cond-mat/0112398},
year = {2007}
}
Comments
4 pages one figure