2017/08/31 by Joonbum Park, Hideaki Sakai, Onur Erten +3 · 10 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Diffraction #Iron-based superconductors research #Lattice (music) #Magnetic and transport properties of perovskites and related materials #Mathematical physics #Order (exchange) #Orthorhombic crystal system #Phase transition #Physics #Quantum mechanics #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.97.024411
published in Physical review. B./Physical review. B 97(2) (American Physical Society) · 6 pages, 7 figures
openalex created_date 2017/08/31 · arxiv created 2018/01/11 · openalex publication_date 2018/01/11 · arxiv updated 2018/01/15 · openalex updated_date 2026/08/05
Lattice symmetry is important for classifying ordered phases in solids, but can it have consequences for the energetics of phase formation? In the heavy-fermion antiferromagnet CeAuSb2, it does. The unstressed lattice is tetragonal, and an orthorhombic distortion can be created through in-plane uniaxial pressure. For small distortions, the N'eel transition is hardly affected, since the tetragonal lattice symmetry provides an energetic stabilization of the magnetic order. When the applied orthorhombicity exceeds a threshold, however, the transition splits into two transitions, and the order changes qualitatively.