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Nanoscale manipulation of the Mott insulating state coupled to charge order in 1T-TaS2.

ABSTRACT: The controllability over strongly correlated electronic states promises unique electronic devices. A recent example is an optically induced ultrafast switching device based on the transition between the correlated Mott insulating state and a metallic state of a transition metal dichalcogenide 1T-TaS2. However, the electronic switching has been challenging and the nature of the transition has been veiled. Here we demonstrate the nanoscale electronic manipulation of the Mott state of 1T-TaS2. The voltage pulse from a scanning tunnelling microscope switches the insulating phase locally into a metallic phase with irregularly textured domain walls in the charge density wave order inherent to this Mott state. The metallic state is revealed as a correlated phase, which is induced by the moderate reduction of electron correlation due to the charge density wave decoherence.

SUBMITTER: Cho D

PROVIDER: S-EPMC4735893 | biostudies-other | 2016

REPOSITORIES: biostudies-other

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Nanoscale manipulation of the Mott insulating state coupled to charge order in 1T-TaS2.

Cho Doohee D Cheon Sangmo S Kim Ki-Seok KS Lee Sung-Hoon SH Cho Yong-Heum YH Cheong Sang-Wook SW Yeom Han Woong HW

Nature communications 20160122

The controllability over strongly correlated electronic states promises unique electronic devices. A recent example is an optically induced ultrafast switching device based on the transition between the correlated Mott insulating state and a metallic state of a transition metal dichalcogenide 1T-TaS2. However, the electronic switching has been challenging and the nature of the transition has been veiled. Here we demonstrate the nanoscale electronic manipulation of the Mott state of 1T-TaS2. The ...[more]

PMID: 26795073

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