Electric pulse induced electronic patchwork in the Mott insulator GaTa4Se8
type: Dataset
description: Following a recent discovery of the Insulator-to-Metal Transition induced by electric field in GaTa4Se8, we performed a detailed Scanning Tunneling Microscopy/Spectroscopy study of both pristine (insulating) and transited (conducting) crystals of this narrow gap Mott insulator. The spectroscopic maps show that pristine samples are spatially homogeneous insulators while the transited samples reveal at nanometer scale a complex electronic pattern that consists of metallic and superinsulating patches immersed in the pristine insulating matrix. Surprisingly, both kinds of patches are accompanied by a strong local topographic inflation, thus evidencing for a strong electron-lattice coupling involved in this metal-insulator transition. Finally, using a strong electric field generated across the STM tunneling junction, we demonstrate the possibility to trig the metal-insulator transition locally even at room temperature.
issued: 2026-05-18T08:52:04.099184
language: en
modified: 2026-05-18T08:52:04.099190
contact point: Organization
  fn: CCSD
keyword: infoeu-reposemanticspreprint
keyword: metal-insulator-transitions
keyword: physcondcm-scephysics-physicscondensed-matter-cond-matstrongly-correlated-electrons-cond-
keyword: preprints-working-papers-
keyword: scanning-tunneling-microscopyspectroscopy
keyword: transition-metal-chalcogenides
landing page: https://hal.science/hal-00698631

Electric pulse induced electronic patchwork in the Mott insulator GaTa4Se8
type: Distribution
format: HTML
issued: 2026-05-18T08:52:04.168242
modified: 2026-05-18T08:52:04.080982
access URL: https://hal.science/hal-00698631

test_moissonnage_selune
type: Agent