P A Sreeram
Articles written in Pramana – Journal of Physics
Volume 61 Issue 3 September 2003 pp 601-609
We revisit the Anderson-Hasegawa double-exchange model and critically examine its exact solution when the core spins are treated quantum mechanically. We show that the quantum effects, in the presence of an additional superexchange interaction between the core spins, yield a term, the significance of which has been hitherto ignored. The importance of this term is further assessed by numerically exact computation for a four-spin system.
Volume 96, 2022
Continuous Article Publishing mode
Click here for Editorial Note on CAP Mode