Interacting in-plane molecular dipoles in a zigzag chain
Name
PhysRevA.96.043615.pdf
Size
788.61 KB
Format
Adobe PDF
Checksum (MD5)
8be7f99fd92a032005554d98112eb789
Author(s)
Wang, Qingyang
Otterbach, Johannes
Yelin, Susanne F.
Date Issued
October 2017
Journal
Physical Review A
Publisher
American Physical Society
Citation
Wang, Qingyang et al. "Interacting in-plane molecular dipoles in a zigzag chain." Physical Review A 96, 4 (October 2017): 043615 © 2017 American Physical Society
Version
Final published version
Abstract
A system with externally polarized dipole molecules at half-filling moving along a one-dimensional zigzag chain is studied, including ground-state phase diagrams. The dipoles are oriented in-plane. Together with the geometry of the chain, this gives rise to a bond-alternating nearest-neighbor interaction due to simultaneous attractive and repulsive interactions. By tuning the ratio between the nearest-neighbor interaction and hopping, various phases can be accessed by controlling the polarization angle. In the ultrastrong coupling limit, the system simplifies to a frustrated extended axial Ising model. For the small coupling limit, qualitative discussion of the ordering behavior using effective field theory arguments is provided. We show that when the chain angle is small, the system mostly exhibits BKT-type phase transitions, whereasa large chain angle would drive the system into a gapped (Ising) dimerized phase, where the hopping strength is closely related to the orientation of dimerized pairs.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevA.96.043615
