Antiferromagnetic films in weak magnetic and staggered fields

2017/01/15 by Christoph P. Hofmann
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Field (mathematics) #Geometry #Magnetic field #Magnetization #Mathematics #Partition function (quantum field theory) #Perpendicular #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Theoretical and Computational Physics #cond-mat.str-el #hep-lat #hep-ph

paper · pdf · doi:10.1103/physrevb.95.134402

published as Phys. Rev. B 95, 134402 (2017) · 26 pages, 11 figures

arxiv created 2017/01/15 · openalex created_date 2017/01/26 · openalex publication_date 2017/04/03 · arxiv updated 2017/04/12 · openalex updated_date 2026/08/05

Abstract

We study the low-temperature behavior of antiferromagnets in two spatial dimensions that are subjected to a magnetic field oriented perpendicular to the staggered magnetization order parameter. The evaluation of the partition function is carried to two-loop order within the systematic effective Lagrangian technique. Low-temperature series that are valid in weak magnetic and staggered fields are derived for the pressure, staggered magnetization, and magnetization. Remarkably, at T=0, the staggered magnetization is enhanced by the magnetic field.

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