A comparison of the resistivity vs temperature of K 3 C 60 and Rb 3 C 60 in the normal state, and KC 60 in the polymer state, with that of the RbC 60 ESR linewidth suggests that the metallic transport in all these alkali fullerides arises from the same mechanism. The equality of ...
nonconducting material, it is in fact better described as a poor conductor or a substance of highresistanceto the flow ofelectric current. Different insulating and conducting materials are compared with each other in this regard by means of a material constant known asresistivity.See also...
(a, b) Resistivity versus temperature for CaMnO3 (CMO, red lines) and Ca0.96Ce0.04MnO3 [CCMO(x 5 0.04), blue lines] films grown on a YAlO3 (YAO) substrate. Thicknesses are (a) 90 unit cells (u.c.) and (b) 12 u.c. (c) Piezoelectric response vs. applied d.c. voltage on ...
a Temperature-dependent resistivity (ρ) of LaNiO3 films of different thicknesses. b Metal-insulator transition temperature TMIT and c ρ(300 K) of LaNiO3 films with different thicknesses and surface terminations. Open circles indicate that no MIT was observed in the temperature range studied....
Around the ferromagnetic transition temperature TC, large negative magnetoresistance was observed. Irrespective of temperature, reduction of the resistivity is scaled with the field-induced magnetization (M) as -Δρ/ρ=C(M/Ms)2 for M/Ms≲0.3, where Ms is the saturated magnetization. The coe...
Normal-state resistivity measurements at high fields and low temperatures in electron-doped Pr2-xCexCuO4 thin films reveal an insulator-metal crossover near a doping level x≈0.15, similar to a previous report on hole-doped La2-xSrxCuO4. The temperature dependence of the resistivity of insul...
The emergence of layered transition metal dichalcogenides has invigorated interests in the challenging problem of metal-insulator transition in two dimensions. The observed clearly distinctive conductivity dependences on temperature show diverse characteristic features of metal-insulator transition depending on the...
Volume Resistivity9×1015Ω.cmASTM D 257 Dimensions Size (mm)Inner Diameter D(mm)Min Cable Outer Diameter (mm)Max Cable Outer Diameter (mm)Recovered Length L(mm) VS28-1.4286.025.036 VS28-1.7286.025.043 VS28-5286.025.0130 VS28-6286.025.0150 ...
2b. Although current also flows through the bottom surface and, for Vg > 1.75 V, through bulk regions, thus contributing to the resistivity, only electrons in the top layer contribute to the geometric transport resonances. At lower bias, however, where EF is in the valence band (...
The inset shows the normalized resistivity vs. temperature (the arrows indicate the metal- insulator crossover temperature at different VG). TMI is reversibly modulated in the range 90–250 K by applying a small gate voltage, | VG | # 3 V. boundaries is more critical, leading to a ...