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Competing structures in two-dimensional trapped dipolar gases
We study a system of dipolar molecules confined in a two-dimensional trap and subject to an optical square lattice. The repulsive long-range dipolar interaction D/r super(3) favors an equilateral triangular arrangement of the molecules, which competes against the square symmetry of the underlying op...
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Published in: | Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2014-08, Vol.90 (6), Article 060101 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | We study a system of dipolar molecules confined in a two-dimensional trap and subject to an optical square lattice. The repulsive long-range dipolar interaction D/r super(3) favors an equilateral triangular arrangement of the molecules, which competes against the square symmetry of the underlying optical lattice with lattice constant b and amplitude V. We find the minimal-energy states at the commensurate density n = 1/b super(2) and establish the complete square-to-triangular transformation pathway of the lattice with decreasing V involving period-doubled, solitonic, and distorted-triangular configurations. |
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ISSN: | 1098-0121 1550-235X |
DOI: | 10.1103/PhysRevB.90.060101 |