2010/09/21 by Gianluca Giovannetti, G. Giovannetti, Alessandro Stroppa +17 · 76 citations
Materials Science · Physics and Astronomy · #Ab initio #Advanced Condensed Matter Physics #Antiferromagnetism #Atomic physics #Condensed matter physics #Dielectric #Ferroelectricity #Ground state #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetism #Magnetization #Materials science #Multiferroics #Multiferroics and related materials #Physics #Polarization density #Quantum mechanics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.83.060402
published in Physical Review B 83(6) (American Physical Society) · 4+ pages, 3 figures
arxiv created 2010/09/21 · openalex publication_date 2011/02/11 · arxiv updated 2011/07/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
By studying the dielectric properties of the geometrically frustrated spinel CdV2O4, we observe ferroelectricity developing at the transition into the collinear antiferromagnetic ground state. In this multiferroic spinel, ferroelectricity is driven by local exchange striction and not by the more common scenario of spiral magnetism. The experimental findings are corroborated by ab initio calculations of the electric polarization and the underlying spin and orbital order. The results point toward a charge rearrangement due to dimerization, where electronic correlations and the proximity to the insulator-metal transition play an important role.