Interfaces, strings, and a soft mode in the square lattice quantum dimer model

Banerjee, Debasish; Bögli, Michael; Hofmann, C. P.; Jiang, F.-J.; Widmer, Philippe; Wiese, Uwe-Jens (2014). Interfaces, strings, and a soft mode in the square lattice quantum dimer model. Physical review. B - condensed matter and materials physics, 90(24) American Physical Society 10.1103/PhysRevB.90.245143

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The quantum dimer model on the square lattice is a U(1) gauge theory that addresses aspects of the physics of high-Tc superconductors. Using a quantum Monte Carlo method, we show that the theory exists in a confining columnar valence bond solid phase. The interfaces separating distinct columnar phases display plaquette order, which, however, is not realized as a bulk phase. Static “electric” charges are confined by flux tubes that consist of multiple strands, each carrying a fractionalized flux ¼. A soft pseudo-Goldstone mode (which becomes exactly massless at the Rokhsar-Kivelson point) extends deep into the columnar phase, with potential implications for high-Tc physics.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Banerjee, Debasish; Bögli, Michael; Widmer, Philippe and Wiese, Uwe-Jens

Subjects:

500 Science > 530 Physics

ISSN:

1098-0121

Publisher:

American Physical Society

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

09 Jan 2015 10:15

Last Modified:

26 Jun 2016 01:57

Publisher DOI:

10.1103/PhysRevB.90.245143

BORIS DOI:

10.7892/boris.61520

URI:

https://boris.unibe.ch/id/eprint/61520

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