2003/09/15 by Lan Yin
Materials Science · Mathematics · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Coupling (piping) #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Materials science #Mathematics #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spiral (railway) #Theoretical and Computational Physics #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.68.104433
published as PRB 68, 104433 (2003). · 7 pages, 3 postscript figures. To be published in Phys. Rev. B
arxiv created 2003/09/15 · openalex publication_date 2003/09/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The phase diagram of the double-exchange model is studied in the large-S limit at zero temperature in two and three dimensions. We find that the spiral state has lower energy than the canted antiferromagnetic state in the region between the antiferromagnetic phase and the ferromagnetic phase. At small doping, the spiral phase is unstable against phase separation due to its negative compressibility. When the Hund coupling is small, the system separates into spiral regions and antiferromagnetic regions. When the Hund coupling is large, the spiral phase disappears completely and the system separates into ferromagnetic regions and antiferromagnetic regions.