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Electronic response of a Mott insulator at a current-induced insulator-to-metal transition

Physics

Electronic response of a Mott insulator at a current-induced insulator-to-metal transition

C. T. Suen, I. Marković, et al.

The study delves into the fascinating insulator-to-metal transition of Ca₂RuO₄ induced by d.c. current, conducted by the research team led by C. T. Suen and others. Utilizing transport-ARPES, they reveal a pronounced reduction of the Mott gap and significant modifications in Ru band dispersion, emphasizing the unique phase transition dynamics between lattice structures and electronic responses.

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Playback language: English
Abstract
The Mott insulator Ca₂RuO₄ exhibits an insulator-to-metal transition induced by d.c. current. This study uses transport-ARPES to probe the electronic structure under current, revealing a clear reduction of the Mott gap and a modification in the Ru band dispersion. A free-energy analysis shows the current-induced phase is distinct from the high-temperature metallic phase, highlighting the interplay between lattice and orbital-dependent electronic responses in the current-driven transition.
Publisher
Nature Physics
Published On
Sep 24, 2024
Authors
C. T. Suen, I. Marković, M. Zonno, N. Heinsdorf, S. Zhdanovich, N. H. Jo, M. Schmid, P. Hansmann, P. Puphal, K. Fürsich, S. Smit, C. Au-Yeung, V. Zimmermann, B. Zwartsenberg, M. Krautloher, I. S. Elfimov, R. Koch, S. Gorovikov, C. Jozwiak, A. Bostwick, M. Franz, Eli Rotenberg, B. Keimer, A. Damascelli
Tags
Mott insulator
Ca₂RuO₄
insulator-to-metal transition
d.c. current
transport-ARPES
Mott gap
band dispersion

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