Volume 93, Number 6, March 2011
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||22 March 2011|
Fermi arcs and isotope effect of the magnetic penetration depth in underdoped cuprates
Max-Planck-Institut für Festkörperforschung - Heisenbergstrasse 1, D-70569 Stuttgart, Germany, EU
2 Departamento de Física, Facultad de Ciencas Exactas e Ingeniería and IFIR (UNR-CONICET) Av. Pellegrini 250, 2000 Rosario, Argentina
Accepted: 16 February 2011
The isotope coefficient β of the magnetic penetration depth in the superconducting state is studied at T=0 for a d-CDW and a nodal metal model. Disregarding superconductivity the Fermi surface of the first model possesses arcs whereas the second model has no arcs.We show that a large increase of β in the pseudogap region is generically incompatible with Fermi arcs in the pseudogap 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 calculations based on the local density approximation (LDA).
PACS: 74.72.Kf – Pseudogap regime / 74.25.Kc – Phonons / 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.