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Doping dependence of the vortex-core energy in bilayer films of cuprates

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Benfatto, L.
Castellani, C.
Published in Physical Review. B, Condensed Matter. 2008, vol. 77, no. 10
Abstract The energy needed to create a vortex core is the basic ingredient to address the physics of thermal vortex fluctuations in underdoped cuprates. Here, we theoretically investigate its role in the occurrence of the Beresinskii-Kosterlitz-Thouless transition in a bilayer film with inhomogeneity. From the comparison with recent measurements of the penetration depth in two-unit-cell thin films, we can extract the value of the vortex-core energy μ and show that μ scales linearly with Tc at low doping.
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BENFATTO, L., CASTELLANI, C., GIAMARCHI, Thierry. Doping dependence of the vortex-core energy in bilayer films of cuprates. In: Physical Review. B, Condensed Matter, 2008, vol. 77, n° 10. https://archive-ouverte.unige.ch/unige:36036

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Deposited on : 2014-04-28

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