Dipolar Aleppo lattice: Ground state ordering and ergodic dynamics in the absence of vertex frustration

Year: 2025

Type: article

Abstract: We introduce the Aleppo spin ice geometry, another variation of decimated square ice patterns, which in contrast to similar systems previously studied, does not exhibit vertex frustration. Using synchrotron-based photoemission electron microscopy, we directly visualize low-energy states achieved after thermal annealing, in addition to temperature-dependent moment fluctuations. The results reveal the observation of ground state patterns and the absence of ergodicity-breaking dynamics. Our observations further confirm vertex frustration to be an important criterion for the emergence of ergodicity transitions.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.111.144407

Authors: Davis Crater, Gopi Mahato, Christian Hoyt, Duncan Miertschin, Balaram Regmi, Kevin Hofhuis, Scott Dhuey, Barat Achinuq, Francesco Caravelli, Alan Farhan

Institutions: Baylor University, Paul Scherrer Institute, Lawrence Berkeley National Laboratory, Molecular Foundry, Los Alamos National Laboratory

Language: English

Topic: Advanced Condensed Matter Physics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Office of Science, National Nuclear Security Administration, Laboratory Directed Research and Development, Los Alamos National Laboratory

OpenAlex ID: W4409245105