Correlated electronic states at domain walls of a Mott-charge-density-wave insulator 1T-TaS2

Doohee Cho, Gyeongcheol Gye, Jinwon Lee, Sung Hoon Lee, Lihai Wang, Sang Wook Cheong, Han Woong Yeom

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Domain walls in interacting electronic systems can have distinct localized states, which often govern physical properties and may lead to unprecedented functionalities and novel devices. However, electronic states within domain walls themselves have not been clearly identified and understood for strongly correlated electron systems. Here, we resolve the electronic states localized on domain walls in a Mott-charge-density-wave insulator 1T-TaS2 using scanning tunneling spectroscopy. We establish that the domain wall state decomposes into two nonconducting states located at the center of domain walls and edges of domains. Theoretical calculations reveal their atomistic origin as the local reconstruction of domain walls under the strong influence of electron correlation. Our results introduce a concept for the domain wall electronic property, the walls own internal degrees of freedom, which is potentially related to the controllability of domain wall electronic properties.

Original languageEnglish
Article number392
JournalNature communications
Volume8
Issue number1
DOIs
Publication statusPublished - 2017 Dec 1

Fingerprint

Charge density waves
Domain walls
Electronic states
domain wall
insulators
Electrons
electronics
Spectrum Analysis
Equipment and Supplies
Electronic properties
Electron correlations
controllability
Controllability
electrons
Physical properties
degrees of freedom
physical properties
Spectroscopy
Scanning
scanning

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Cho, Doohee ; Gye, Gyeongcheol ; Lee, Jinwon ; Lee, Sung Hoon ; Wang, Lihai ; Cheong, Sang Wook ; Yeom, Han Woong. / Correlated electronic states at domain walls of a Mott-charge-density-wave insulator 1T-TaS2. In: Nature communications. 2017 ; Vol. 8, No. 1.
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Correlated electronic states at domain walls of a Mott-charge-density-wave insulator 1T-TaS2. / Cho, Doohee; Gye, Gyeongcheol; Lee, Jinwon; Lee, Sung Hoon; Wang, Lihai; Cheong, Sang Wook; Yeom, Han Woong.

In: Nature communications, Vol. 8, No. 1, 392, 01.12.2017.

Research output: Contribution to journalArticle

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AU - Cho, Doohee

AU - Gye, Gyeongcheol

AU - Lee, Jinwon

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AU - Wang, Lihai

AU - Cheong, Sang Wook

AU - Yeom, Han Woong

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AB - Domain walls in interacting electronic systems can have distinct localized states, which often govern physical properties and may lead to unprecedented functionalities and novel devices. However, electronic states within domain walls themselves have not been clearly identified and understood for strongly correlated electron systems. Here, we resolve the electronic states localized on domain walls in a Mott-charge-density-wave insulator 1T-TaS2 using scanning tunneling spectroscopy. We establish that the domain wall state decomposes into two nonconducting states located at the center of domain walls and edges of domains. Theoretical calculations reveal their atomistic origin as the local reconstruction of domain walls under the strong influence of electron correlation. Our results introduce a concept for the domain wall electronic property, the walls own internal degrees of freedom, which is potentially related to the controllability of domain wall electronic properties.

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