Orbital-order phase transition in Pr1−xCaxMnO3 probed by photovoltaics
| Autor: | T. Titze, Michael Seibt, M. ten Brink, H. Meer, Daniel Steil, Tobias Meyer, N. Ottinger, S. Melles, Henning Ulrichs, Joerg Hoffmann, Ch. Jooss, C. Seick, Birte Kressdorf, Peter E. Blöchl, Stefan Mathias, A. Weisser |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Phase transition
Materials science Condensed matter physics Transition temperature Order (ring theory) 02 engineering and technology Crystal structure 021001 nanoscience & nanotechnology Manganite 01 natural sciences 7. Clean energy Magnetization 0103 physical sciences Absorption (logic) 010306 general physics 0210 nano-technology Phase diagram |
| Zdroj: | Physical Review B. 103 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.103.235122 |
| Popis: | The orbital-order phase transition in low-doped Pr${}_{1\ensuremath{-}x}$Ca${}_{x}$MnO${}_{3}$ ($x$ \ensuremath{\le} 0.3) is investigated through variation of different physical properties, including photovoltaic response, static and ultrafast transient optical absorption, electric transport, magnetization, and lattice structure. The results suggest that spontaneous orbital order emerges at room temperature and thus at much lower temperatures than previously reported. The requisite modification of the famous phase diagram of the manganite is supported by theoretical calculations, which imply that the observed finite orbital polarization above the orbital-order transition temperature is only induced order caused by octahedral tilting. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|