Abstract
The Mermin-Wagner theorem prevents the stabilisation of long-range magnetic order in two dimensional layered materials, such as the pnictide superconductors, unless the magnetism is associated with a discrete symmetry breaking. A typical known example is the discrete row and column
collinear magnetic state, that emerges in doped iron pnictides materials due to order-by-disorder
mechanism. In these compounds, the magnetic state competes with superconductivity and the mechanism that stabilizes magnetism remains controversial. In this work, we report the phase diagram
of a doped frustrated Heisenberg model obtained throught Monte Carlo simulations combined with
parallel tempering simulation technique. The emergence of long-range magnetic order is stabilized
by interactions between the magnetic dopant impurities.
collinear magnetic state, that emerges in doped iron pnictides materials due to order-by-disorder
mechanism. In these compounds, the magnetic state competes with superconductivity and the mechanism that stabilizes magnetism remains controversial. In this work, we report the phase diagram
of a doped frustrated Heisenberg model obtained throught Monte Carlo simulations combined with
parallel tempering simulation technique. The emergence of long-range magnetic order is stabilized
by interactions between the magnetic dopant impurities.
| Original language | English |
|---|---|
| Journal | Physical Review B (Condensed Matter and Materials Physics) |
| Publication status | Published - 2019 |