2018/08/21 by H. Yamaguchi, Hironori Yamaguchi, Y. Sasaki +19
Materials Science · Mathematics · Physics and Astronomy · #Ab initio #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Ferromagnetism #Field (mathematics) #Frustration #Ground state #Ising model #Magnetic field #Magnetism in coordination complexes #Magnetization #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Square lattice #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.98.094402
to appear in PRB
arxiv created 2018/08/21 · openalex created_date 2018/08/31 · openalex publication_date 2018/09/04 · arxiv updated 2018/09/26 · openalex updated_date 2026/08/05
We present a new model compound with the S=1/2 frustrated square lattice composed of the charge-transfer salt (o-MePy-V)PF6. Ab\phantom\rule4pt0exinitio calculations indicate the formation of an S=1/2 square lattice, in which six types of nearest-neighbor ferromagnetic and antiferromagnetic interactions cause frustration. By applying a magnetic field, we observe an unusually gradual increase of magnetization and a subsequent 1/2-plateau-like behavior. A numerical analysis using the tensor network method qualitatively demonstrates such behaviors and suggests a collinear ordered state and a field-enhanced quantum fluctuation. Furthermore, the local magnetization and T1^\ensuremath-1 probed by nuclear magnetic resonance measurements support these findings.