The dynamical frustration of interlayer excitons delocalizing in bilayer quantum antiferromagnets

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Rademaker, L. and Wu, K. and Hilgenkamp, H. and Zaanen, J. (2012) The dynamical frustration of interlayer excitons delocalizing in bilayer quantum antiferromagnets. Europhysics Letters, 97 (2). p. 27004. ISSN 0295-5075

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Abstract:Using the self-consistent Born approximation we study the delocalization of interlayer excitons in the bilayer Heisenberg quantum antiferromagnet. Under realistic conditions we find that the coupling between the exciton motion and the spin system is strongly enhanced as compared to the case of a single carrier, to a degree that it mimics the confinement physics of carriers in Ising spin systems. We predict that the "ladder spectrum" associated with this confinement physics should be visible in the c-axis exciton spectra of insulating bilayer cuprates such as YBa2Cu3O6. Our discovery indicates that finite density systems of such excitons should show very rich physical behavior
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/82258
Official URL:http://dx.doi.org/10.1209/0295-5075/97/27004
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