Specific heat ofYBa2Cu3

Kathryn A. Moler

¹

,

David L. Sisson

²

,

Jeffrey S. Urbach

³

et al.

Impurity scattering effects on the low-temperature specific heat ofd-wave superconductors

“…is the magnetic contribution of spin-2 paramagnetic centers (PC's) associated with S=2 was used rather than the conventional Schottky anomaly, which was thought to be related to CuO Chains [7,22].…”

“…The T 2 temperature dependence of the electronic term in C at zero magnetic field H=0 and the H 1/2 dependence of the linear term coefficient g have been interpreted as strong evidence of the line nodes of order parameter [3][4][5][6][7][8][9][10][11][12]. Very recently, the scaling behavior of the electronic specific heat contribution C e (T,H) has been predicted by theory [13,14], and confirmed by experiments [5,[9][10][11].…”

Free flux flow resistivity in a strongly overdoped high-Tccuprate: The purely viscous motion of the vortices in a semiclassicald-wave superconductor

“…From the viewpoint of the physical properties of the vortex state, perhaps the most relevant effect of the nodes are the existence of gapless quasiparticles extending outside the vortex core. [8,9,10] In fact recent studies of heat capacity [11], thermal conductivity [12], and NMR relaxation rate [13] provide a strong evidence that these quantities are governed by delocalized quasiparticles. However, despite these extensive studies of the vortex state of unconventional superconductors, the microscopic mechanisms of the energy dissipation associated with the viscous vortex motion is still far from being completely understood, exposing explicitly our incomplete knowledge of vortex dynamics in type-II superconductors.…”

Specific heat of underdoped cuprate superconductors from a phenomenological layered Boson–Fermion model

“…[16] and references therein), and its superconducting counterpart that evolves as γ 0 when the temperature approaches zero. Secondly, there is a quadratic αT 2 term for zero magnetic field [17][18][19] below T c (not exhibited in conventional superconductors), which changes to a H 1/2 T component in the presence of an external magnetic field [20] H, attributable to the superconducting part of the electronic specific heat C es . The reported values for this two constants depend strongly on the conditions of each experiment [17] and on the theoretical method used to relate the different parts of the total specific heat.…”

“…Although a series of indirect methods have been used to extract the electronic component of the total specific heat [16,18,19,24], we use the Phonon Density of States (PDOS) directly derived from Angle Resolved Photoemission Spectroscopy (ARPES) experiments to calculate the lattice specific heat as shown in Refs. [10] and [25].…”