Dependence of the superconducting effective mass on doping in cuprates

Details Dependence of the superconducting effective mass on doping in cuprates Dependence of the superconducting effective mass on doping in cuprates

2005-06-14

arxiv.org/abs/cond-mat/0506317v1

Physics

Condensed Matter

Superconductivity

9 pages, 5 figures

Scientific paper

10.1016/j.physleta.2006.03.044

Using a doping-determined multiband model spectrum of a "typical'' cuprate the effective mass of the paired carriers is calculated on the whole doping scale. Large $m_{ab}$ values quench rapidly with leaving the very underdoped region. Further slower diminishing of $m_{ab}$ reproduces the trend towards restoring the Fermi-liquid behaviour in cuprates with progressive doping. The interband superconducting condensate density ($n_s$) shows similar behaviour to the transition temperature and superconducting gaps. The $n_s(0)/m_{ab}$ ratio has an expressed maximum close to optimal doping as also the thermodynamic critical field. All the overlapping band components are intersected by the chemical potential at this. The pairing strength and the phase coherence develop simultaneously. In spite of its simplicity, the model describes the behaviour of various cuprate characteristics on the doping scale.

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