Condensate fraction scaling provides a more accurate and less finite-size-affected probe of the BKT transition in the 2D attractive Hubbard model, giving TBKT/t = 0.1420(7) for U/t = -4, μ/t = 0.25 and a specific-heat anomaly at about 1.10 TBKT.
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Condensate Fraction Scaling and Berezinskii-Kosterlitz-Thouless Transition of Superconductivity and Superfluidity
Condensate fraction scaling provides a more accurate and less finite-size-affected probe of the BKT transition in the 2D attractive Hubbard model, giving TBKT/t = 0.1420(7) for U/t = -4, μ/t = 0.25 and a specific-heat anomaly at about 1.10 TBKT.