3D X-Y scaling of the specific heat of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">YBa</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Cu</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn>7</mn><mi mathvariant="normal">−</mi><mi mathvariant="normal">δ</mi></mrow></msub></mrow></math> single crystals

Neil Overend; Mark A. Howson; Ian D. Lawrie

doi:10.1103/PhysRevLett.72.3238

3D X-Y scaling of the specific heat of ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$ single crystals

Neil Overend, Mark A. Howson, and Ian D. Lawrie

Phys. Rev. Lett. 72, 3238 – Published 16 May 1994; Erratum Phys. Rev. Lett. 74, 4359 (1995)

Abstract

The specific heat of a single crystal sample of ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$ has been measured with magnetic fields up to 8 T applied parallel to the c axis of the crystal. The results provide strong evidence for the existence of a critical regime within which there is scaling behavior characteristic of the three-dimensional X-Y model with critical exponents consistent with those observed in superfluid ${}^{4}{He}$ .