Evolution with hole doping of the electronic excitation spectrum in the cuprate superconductors

Details Evolution with hole doping of the electronic excitation spectrum in the cuprate superconductors Evolution with hole doping of the electronic excitation spectrum in the cuprate superconductors

2008-04-18

arxiv.org/abs/0804.3045v1

J. Phys.:Condens. Matter 20 385210 (2008)

Physics

Condensed Matter

Superconductivity

19 pages, 5 figures

Scientific paper

10.1088/0953-8984/20/38/385210

The recent scanning tunnelling results of Alldredge et al on Bi-2212 and of Hanaguri et al on Na-CCOC are examined from the perspective of the BCS/BEC boson-fermion resonant crossover model for the mixed-valent HTSC cuprates. The model specifies the two energy scales controlling the development of HTSC behaviour and the dichotomy often now alluded to between nodal and antinodal phenomena in the HTSC cuprates. Indication is extracted from the data as to how the choice of the particular HTSC system sees these two basic energy scales (cursive-U, the local pair binding energy and, Delta-sc, the nodal BCS-like gap parameter) evolve with doping and change in degree of metallization of the structurally and electronically perturbed mixed-valent environment.

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