Single-Laser-Pulse-Driven Thermal Limit of the Quasi-Two-Dimensional Magnetic Ordering in 
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Wang, Ruitang; Sun, Jiabao; Meyers, D.; Lin, Jun-Fa; Yang, Junyi; Li, Gang; Ding, Hong; DiChiara, Anthony; Cao, Yue; Liu, J.; Dean, Mark; Wen, Haidan; Liu, X.

doi:10.1103/physrevx.11.041023

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2024

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“…Finally, we will mention some recent advances in the experimental observation of metastable states using sub-picosecond optical pulses, which we believe can be applied to reveal metastable states discussed here and in [25]. For instance, in the quasi-two-dimensional antiferromagnet Sr 2 IrO4, a long-range magnetic correlation along one direction was converted into a glassy condition by a single 100-fs-laser pulse [66]. Atomic-scale PbTiO 3 /SrTiO 3 superlattices, counterpoising strain and polarization states in alternate layers, was converted by sub-picosecond optical pulses to a supercrystal phase in [67].…”

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Yang

2024

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confidence: 98%

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Yang

2024

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Free energy and metastable states in the square-lattice $J_1$-$J_2$ Ising model

Abalmasov

2024

SciPost Phys.

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Free energy as a function of polarization is calculated for the square-lattice J_1J1-J_2J2 Ising model for J_2 < |J_1|/2J2<|J1|/2 using the random local field approximation (RLFA) and Monte Carlo (MC) simulations. Within RLFA, it reveals a metastable state with zero polarization in the ordered phase. In addition, the Landau free energy calculated within RLFA indicates a geometric slab-droplet phase transition at low temperature, which cannot be predicted by the mean field approximation. In turn, restricted free energy calculations for finite-size samples, exact and using MC simulations, reveal metastable states with a wide range of polarization values, but with only two domains. Taking into account the dependence of the restricted free energy on the nearest-neighbor correlations allows us to identify several more metastable states. The calculations also reveal additional slab-droplet transitions at J_2 > |J_1|/4J2>|J1|/4. These findings enrich our knowledge of the J_1J1-J_2J2 Ising model and the RLFA as a useful theoretical tool to study phase transitions in spin systems.

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Single-Laser-Pulse-Driven Thermal Limit of the Quasi-Two-Dimensional Magnetic Ordering in Sr2IrO4

Cited by 2 publications

References 37 publications

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Free energy and metastable states in the square-lattice $J_1$-$J_2$ Ising model

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