Evidence for weak antilocalization-weak localization crossover and metal-insulator transition in CaCu$_{3}$Ru$_{4}$O$_{12}$ thin films
| Autor: | D. Samal, P. S. Anil Kumar, Shwetha G. Bhat, Birabar Nanda, B. C. Behera, Subhadip Jana, Lokanath Patra |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Condensed Matter - Materials Science
Materials science Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Condensed Matter - Mesoscale and Nanoscale Physics Scattering Crossover General Physics and Astronomy Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Electron 01 natural sciences 010305 fluids & plasmas Weak localization Condensed Matter - Strongly Correlated Electrons 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Condensed Matter::Strongly Correlated Electrons Thin film Metal–insulator transition 010306 general physics Quantum Sheet resistance |
| Popis: | Artificial confinement of electrons by tailoring the layer thickness has turned out to be a powerful tool to harness control over competing phases in nano-layers of complex oxides. We investigate the effect of dimensionality on transport properties of $d$-electron based heavy-fermion metal CaCu$_{3}$Ru$_{4}$O$_{12}$. Transport behavior evolves from metallic to localized regime upon reducing thickness and a metal insulator transition is observed below 3 nm film thickness for which sheet resistance crosses $h/e^{2} \sim 25~$k$\Omega$, the quantum resistance in 2D. Magnetotransport study reveals a strong interplay between inelastic and spin-orbit scattering lengths upon reducing thickness, which results in weak antilocalization (WAL) to weak localization (WL) crossover in magnetoconductance. Comment: 10 pages, 4 figures |
| Databáze: | OpenAIRE |
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