TY  - JOUR
AU  - Kim, Sun-Woo
AU  - Kim, Hyun-Jung
AU  - Cheon, Sangmo
AU  - Kim, Tae-Hwan
TI  - Two-dimensional chiral stacking orders in quasi-one-dimensional charge density waves
JO  - Physical review / B
VL  - 102
IS  - 12
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2020-03293
SP  - 121408
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000573183400002
DO  - DOI:10.1103/PhysRevB.102.121408
UR  - https://juser.fz-juelich.de/record/884856
ER  -