Conditions for an emergent gauge field in planar artificial spin ices with the dumbbell model approach

被引：0
|
作者：
Nascimento, F. S. [1 ]
de Oliveira, L. B. [2 ]
Duarte, D. G. [2 ]
de Araujo, C. I. L. [2 ]
Moura-Melo, W. A. [2 ]
Pereira, A. R. [2 ]
机构：
[1] Univ Fed Reconcavo Bahia, Ctr Formacao Prof, BR-45300000 Amargosa, Bahia, Brazil
[2] Univ Fed Vicosa, Dept Fis, Lab Spintron & Nanomagnetismo, Vicosa, MG, Brazil
来源：
JOURNAL OF APPLIED PHYSICS | 2024年 / 135卷 / 24期
关键词：
MAGNETIC MONOPOLES; COULOMB PHASE; REALIZATION; STRINGS; ENTROPY; LATTICE;
D O I：
10.1063/5.0214755
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetic structure factor (MSF), calculated from ground state configuration previously obtained by Monte Carlo simulation in different rectangular artificial spin ices, is employed to investigate ground state degeneracy. Our analysis considers the importance of nanoislands size to the ratio between rectangle sides in the lattice parameters via a dumbbell model. Pinch points in MSF along with residual entropy, determined for a number of different rectangular lattices with disconnected nanoislands, point out the conditions for the emergency of a gauge field, through which magnetic monopoles interact effectively.
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页数：7
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