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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.

Unlock the mysteries of the Mott insulator Ca₂RuO₄ with groundbreaking research conducted by a team of experts. This study reveals how d.c. current induces a fascinating insulator-to-metal transition, shedding light on current-induced modifications to Ca₂RuO₄'s electronic states and their implications.

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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 angle-resolved photoemission spectroscopy (ARPES) with four-probe electrical transport measurements to reveal current-induced modifications in Ca₂RuO₄'s electronic states, including a Mott gap reduction and altered Ru band dispersion. Free-energy analysis demonstrates that the current-induced phase is electronically distinct from the high-temperature zero-current metallic phase, highlighting the strong interplay between lattice and orbital-dependent electronic responses in the current-driven insulator-to-metal 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
insulator-to-metal transition
Ca₂RuO₄
current-induced modifications
ARPES
electronic states
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