| Autor: |
Jenni, K., Wirth, F., Dietrich, K., Berger, L., Sidis, Y., Kunkemöller, S., Grams, C. P., Khomskii, D. I., Hemberger, J., Braden, M. |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Materials 4, 085001 (2020) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevMaterials.4.085001 |
| Popis: |
Combining quasistatic and time-resolved transport measurements with X-ray and neutron diffraction experiments we study the non-equilibrium states that arise in pure and in Ti substituted Ca$_2$RuO$_4$ under the application of current densities. Time-resolved studies of the current-induced switching find a slow conductance relaxation that can be identified with heating and a fast one that unambiguously proves an intrinsic mechanism. The current-induced phase transition leads to complex diffraction patterns. Separated Bragg reflections that can be associated with the metallic and insulating phases by their lattice parameters, indicate a real structure with phase coexistence that strongly varies with temperature and current strength. A third contribution with a $c$ lattice constant in between those of metallic and insulating phases appears upon cooling. At low current densities, this additional phase appears below $\sim$100 K and is accompanied by a suppression of the antiferromagnetic order that otherwise can coexist with current carrying states. A possible origin of the intermediate phase is discussed. |
| Databáze: |
arXiv |
| Externí odkaz: |
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