Speaker
Sam Studdy
(Brock University)
Description
A recent study in the context of elemental lithium and sodium has brought out a remarkable property of close-packed solids (CPSs). Under certain assumptions, the electronic band structure is identical for any CPS. This leads to a large degeneracy, with an infinite number of structural configurations for the ground state. Here, structural frustration is explored further in the context of close-packed magnets using the classical Heisenberg model. We prove all CPS magnets with first- and second-nearest neighbour couplings are equivalent, as determined from Luttinger-Tisza analysis. Furthermore, we demonstrate that degeneracy is lifted with the introduction of spin waves, and provide arguments for the states chosen by thermal fluctuations.
| Keyword-1 | Luttinger-Tisza method |
|---|---|
| Keyword-2 | Close-packed solids |
| Keyword-3 | Spin waves |
Author
Sam Studdy
(Brock University)
Co-authors
Mr
Alwyn Jose Raja
(Indian Institute of Technology)
Ganesh Ramachandran
(Brock University)