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26 April 2024 |
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Excitonic Superfluid to solid transition in bilayer quantum Hall systems | | Jinwu Ye
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26 Jun 2006 | | Abstract: | One of the remaining outstanding problems in Bilayer Quantum Hall systems is to understand novel phases and quantum phase transitions as the distance between the two layers is changed. Here we investigate this problem from an effective theory. We find the instability driven by magneto-roton minimum collapsing at a finite wavevector in the pseudo-spin channel leads to the formation of a excitonic normal solid (ENS) at some intermediate distances. We construct a quantum Ginsburg-Landau theory to study the transition from the excitonic superfluid (ESF) to the ENS and analyze in detail the properties of the ENS. We show that a square lattice is the favorite lattice. In the presence of disorders, the properties of the ENS are consistent with all the experimental observations in the intermediate distances. Further experimental implications are given. | | Source: | arXiv, cond-mat/0606639 | | Services: | Forum | Review | PDF | Favorites | |
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