Abstract:
:When two periodic potentials compete in materials, one may adopt the other, which straightforwardly generates topological defects. Of particular interest are domain walls in charge-, dipole-, and spin-ordered systems, which govern macroscopic properties and important functionality. However, detailed atomic and electronic structures of domain walls have often been uncertain and the microscopic mechanism of their functionality has been elusive. Here, we clarify the complete atomic and electronic structures of the domain wall network, a honeycomb network connected by Z3 vortices, in the nearly commensurate Mott charge-density wave (CDW) phase of 1T-TaS2. Scanning tunneling microscopy resolves characteristic charge orders within domain walls and their vortices. Density functional theory calculations disclose their unique atomic relaxations and the metallic in-gap states confined tightly therein. A generic theory is constructed, which connects this emergent honeycomb network of conducting electrons to the enhanced superconductivity.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Park JW,Cho GY,Lee J,Yeom HWdoi
10.1038/s41467-019-11981-5subject
Has Abstractpub_date
2019-09-06 00:00:00pages
4038issue
1issn
2041-1723pii
10.1038/s41467-019-11981-5journal_volume
10pub_type
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