SKM 2021 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 17: Charge Density Wave Materials
TT 17.3: Vortrag
Donnerstag, 30. September 2021, 10:30–10:45, H6
Electronic transformations in the semi-metallic transitional oxide Mo8O23 — Venera Nasretdinova1, •Yaroslav Gerasimenko2,3, Jernej Mravlje3, Gianmarco Gatti4, Petra Sutar3, Damjan Svetin3, Anton Meden5, Viktor Kabanov3, Alexander Kuntsevich6,7, Marco Grioni4, and Dragan Mihailovic1,3,5 — 1CENN Nanocenter, Ljubljana, Slovenia — 2University of Regensburg, Germany — 3JSI, Ljubljana, Slovenia — 4EPFL, Lausanne, Switzerland — 5University of Ljubljana, Slovenia — 6LPI RAS, Moscow, Russia — 7HSE, Moscow, Russia
Mo8O23 is a low-dimensional stoichiometric transitional metal oxide from MoO3−x family. Its room-temperature phase associated with charge density wave (CDW) is accompanied by non-monotonic resistivity at low temperatures well below structural transitions. Using tunneling and angle-resolved spectroscopy, transport measurements and density functional calculations we reveal electronic transformations leading to a multi-band correlated ground state [1,2]. We observe the metal-to-insulator transition at 343K in resistivity, consistent with
CDW onset. At low temperatures, the picture with the only CDW order parameter is broken by the onset of the correlated ground state visible both in transport and spectroscopic probes. Spatially-resolved tunneling spectroscopy studies reveal the emergent electronic texture. We discuss the possible origins of the electronic order that emerge in
the absence of any structural or magnetic transitions [3].
[1] V. Nasretdinova et al. PRB 99, 085101
[2] V. Nasretdinova et al., Sci.Rep. 9, 15959 (2019)
[3] V. Nasretdinova et al., in preparation