INVESTIGADORES
GRECO Andres Francisco
artículos
Título:
Fermi arcs and isotope effect of the magnetic penetration depth in underdoped cuprates
Autor/es:
R. ZEYHER1(A) AND A. GRECO
Revista:
EUROPEAN JOURNAL OF PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2011 vol. 93 p. 67002 - 67007
ISSN:
0143-0807
Resumen:
Abstract The isotope coefficient β of the magnetic penetration depth in the superconductingstate is studied at T =0 for a d-CDW and a nodal metal model. Disregarding superconductivitythe Fermi surface of the first model possesses arcs whereas the second model has no arcs.We showthat a large increase of β in the pseudogap region is generically incompatible with Fermi arcs in thepseudogap state. Thus only the second model shows a large increase of β with decreasing doping.The required electron-phonon coupling is small and compatible with first-principles calculationsbased on the local density approximation (LDA).
