2007/05/31 by Shuai Dong, Han Zhu, Jun‐Ming Liu +1
Materials Science · Physics and Astronomy · #Anisotropy #Condensed matter physics #Dielectric properties of ceramics #Dielectrophoresis #Electric field #Electrical resistivity and conductivity #Ferroelectric and Piezoelectric Materials #Insulator (electricity) #Materials science #Metal #Nanotechnology #Optics #Optoelectronics #Percolation (cognitive psychology) #Percolation threshold #Phase (matter) #Phase transition #Physics #Theoretical and Computational Physics #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.76.132409
published as Physical Review B 76, 132409 (2007) · 4 pages, 5 figures
arxiv created 2007/09/01 · openalex publication_date 2007/10/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a dielectrophoresis model for phase-separated manganites. Without increase of the fraction of metallic phase, an insulator-metal transition occurs when a uniform electric field applied across the system exceeds a threshold value. Driven by the dielectrophoretic force, the metallic clusters reconfigure themselves into stripes along the direction of electric field, leading to the filamentous percolation. This process, which is time dependent, irreversible, and anisotropic, is a probable origin of the colossal electroresistance in manganites.