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Two-dimensional chiral stacking orders in quasi-one-dimensional charge density waves

Title
Two-dimensional chiral stacking orders in quasi-one-dimensional charge density waves
Author
천상모
Keywords
SOLITONS; DYNAMICS
Issue Date
2020-09
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v. 102, no. 12, article no. 121408
Abstract
Chirality manifests in various forms in nature. However, there is no evidence of the chirality in one-dimensional charge density wave (CDW) systems. Here, we have explored the chirality among quasi-one-dimensional CDW ground states with the aid of scanning tunneling microscopy, symmetry analysis, and density functional theory calculations. We discovered three distinct chiralities emerging in the form of two-dimensional chiral stacking orders composed of degenerate CDW ground states: right-, left-, and nonchiral stacking orders. Such chiral stacking orders correspond to newly introduced chiral winding numbers. Furthermore, we observed that these chiral stacking orders are intertwined with chiral vortices and chiral domain walls, which play a crucial role in engineering the chiral stacking orders. Our findings suggest that the unexpected chiral stacking orders can open a way to investigate the chirality in CDW systems, which can lead to diverse phenomena such as circular dichroism depending on chirality.
URI
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.121408https://repository.hanyang.ac.kr/handle/20.500.11754/170512
ISSN
2469-9950; 2469-9969
DOI
10.1103/PhysRevB.102.121408
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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