2008/06/10 by Lunjie Zeng, L. J. Zeng, H. X. Yang +10 · 33 citations
Materials Science · Physics and Astronomy · #Charge (physics) #Charge ordering #Condensed matter physics #Dielectric #Dielectric properties of ceramics #Electric current #Electric field #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Materials science #Metal #Metal–insulator transition #Multiferroics and related materials #Nonlinear system #Optoelectronics #Phase transition #Physics #Voltage #cond-mat.other #cond-mat.str-el
paper · pdf · doi:10.1209/0295-5075/84/57011
published in Europhysics Letters (EPL) 84(5), 57011 (Institute of Physics)
arxiv created 2008/06/10 · openalex publication_date 2008/12/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Electric transport measurements of the charge-frustrated LuFe 2 O 4 , in which charge ordering (CO) and electronic ferroelectricity are found, reveal a strong nonlinear electric conduction upon application of electric fields in both single-crystalline and polycrystalline samples. The threshold electric fields ( E t ) in LuFe 2 O 4 are estimated to be about 60 V/cm and 10 V/cm with E parallel and perpendicular to the c -axis direction, respectively. Experimental measurements also demonstrate that the I - V nonlinearity increases quickly with decreasing temperature. Furthermore, our in situ TEM investigations clearly reveal that the nonlinear I - V behavior is intrinsically in correlation with a current-driven charge ordering insulator-metal transition, and the applied electrical field triggers a visible CO collapse recognizable as the fading of the satellite spots of the CO modulations.