Giant Resistivity Change of Transparent ZnO/Muscovite Heteroepitaxy

2020 ◽  
Vol 12 (19) ◽  
pp. 21818-21826 ◽  
Author(s):  
Min Yen ◽  
Yu-Hong Lai ◽  
Chun-Li Zhang ◽  
Hou-Yung Cheng ◽  
Yi-Ting Hsieh ◽  
...  
Keyword(s):  
Resistivity Change

Photoinduced Resistivity Change Due to Spin-Disorder in a Manganite Film

2000 ◽  
Vol 39 (Part 2, No. 12A) ◽  
pp. L1233-L1235 ◽  
Author(s):  
Xiao Jun Liu ◽  
Yutaka Moritomo ◽  
Arao Nakamura ◽  
Hidefumi Asano
Keyword(s):  
Resistivity Change ◽  
Spin Disorder ◽  
Manganite Film

Spatiotemporal characterization of the field-induced insulator-to-metal transition

Science ◽  
2021 ◽  
pp. eabd9088
Author(s):  
Javier del Valle ◽  
Nicolas M. Vargas ◽  
Rodolfo Rocco ◽  
Pavel Salev ◽  
Yoav Kalcheim ◽  
...  
Keyword(s):  
Electric Field ◽  
Time Resolution ◽  
Growth Dynamics ◽  
Metallic Phase ◽  
Resistivity Change ◽  
Filament Formation ◽  
Correlated Systems ◽  
In Operando ◽  
Crucial Parameter

Many correlated systems feature an insulator-to-metal transition that can be triggered by an electric field. Although it is known that metallization takes place through filament formation, the details of how this process initiates and evolves remain elusive. We use in-operando optical reflectivity to capture the growth dynamics of the metallic phase with space and time resolution. We demonstrate that filament formation is triggered by nucleation at hotspots, with a subsequent expansion over several decades in time. By comparing three case studies (VO2, V3O5 and V2O3), we identify the resistivity change across the transition as the crucial parameter governing this process. Our results provide a spatiotemporal characterization of volatile resistive switching in Mott insulators, key for emerging technologies such as optoelectronics or neuromorphic computing.

Concurrent Structural and Electronic Phase Transitions in V2O3 Thin Films with Sharp Resistivity Change

2021 ◽  
Vol 38 (7) ◽  
pp. 077103
Author(s):  
Chuang Xie ◽  
Ling Hu ◽  
Ran-Ran Zhang ◽  
Shun-Jin Zhu ◽  
Min Zhu ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transitions ◽  
Resistivity Change ◽  
Electronic Phase

scholarly journals Processing Considerations of Thick Film Devices With Multilayered Resistors

1981 ◽  
Vol 9 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Nobuyuki Sugishita ◽  
Akira Ikegami ◽  
Tsuneo Endo
Keyword(s):  
Thick Film ◽  
Thermal Storage ◽  
Resistivity Change ◽  
Sheet Resistivity ◽  
Dielectric Layers ◽  
The Stability ◽  
Film Dielectric

The results of a study into the fabrication of thick film multilayer devices which include resistors on and under the thick film dielectric layers are presented. Although the resistive values of the resistors under the dielectric change in the succeeding firing processes are influenced by the geometry of the resistors, the ratio of the resistivity change in resistors fabricated with the same sheet resistivity pastes and the same geometry is almost the same. The TCR of the resistors under dielectric layers is influenced mainly by the multi-firing processes. The resistive values and TCR of the resistors on dielectric layers are relatively uninfluenced by the dielectric. The stability of these resistors including trimmed ones under long-term thermal storage at 150℃ is compared with that of resistors on alumina substrates.

Detecting rupture precursors and determining the main fracture spread direction of rock with dynamic rock resistivity change anisotropy

2000 ◽  
Vol 13 (2) ◽  
pp. 234-237 ◽  
Author(s):  
Feng Chen ◽  
Ji-Gang Xiu ◽  
Jin-Zhen An ◽  
Chun-Ting Liao ◽  
Da-Yuan Chen
Keyword(s):  
Resistivity Change ◽  
Main Fracture

scholarly journals Human CT Measurements of Structure/Electrode Position Changes During Respiration with Electrical Impedance Tomography

2013 ◽  
Vol 7 (1) ◽  
pp. 109-115 ◽  
Author(s):  
Jie Zhang ◽  
Lihong Qin ◽  
Tadashi Allen ◽  
Robert P Patterson
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Structural Changes ◽  
Electrode Placement ◽  
Accurate Information ◽  
Electrode Position ◽  
Resistivity Change ◽  
Ct Scanner ◽  
Impedance Tomography ◽  
Measured Resistivity

For pulmonary applications of Electrical Impedance Tomography (EIT) systems, the electrodes are placed around the chest in a 2D ring, and the images are reconstructed based on the assumptions that the object is rigid and the measured resistivity change in EIT images is only caused by the actual resistivity change of tissue. Structural changes are rarely considered. Previous studies have shown that structural changes which result in tissue/organ and electrode position changes tend to introduce artefacts to EIT images of the thorax. Since EIT reconstruction is an ill-posed inverse problem, any small inaccurate assumptions of object may cause large artefacts in reconstructed images. Accurate information on structure/electrode position changes is a need to understand factors contributing to the measured resistivity changes and to improve EIT reconstruction algorithm. Our previous study using MRI technique showed that chest expansion leads to electrode and tissue/organ movements but not significant as proposed. The accuracy of the measurements by MRI may be limited by its relatively low temporal and spatial resolution. In this study, structure/electrode position changes during respiration cycle in patients who underwent chest CT scans are further investigated. For each patient, sixteen fiduciary markers are equally spaced around the surface, the same as the electrode placement for EIT measurements. A CT scanner with respiration-gated ability is used to acquire images of the thorax. CT thoracic images are retrospectively reconstructed corresponding temporally to specific time periods within respiration cycle (from 0% to 90%, every 10%). The average chest expansions are 2 mm in anterior-posterior and -1.6 mm in lateral directions. Inside tissue/organ move down 9.0±2.5 mm with inspiration of tidal volume (0.54±0.14 liters), ranging from 6 mm to 12 mm. During normal quiet respiration, electrode position changes are smaller than expected. No general patterns of electrode position changes are observed. The results in this study provide guidelines for accommodating the motion that may introduce artefacts to EIT images.

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