Anomalous Peak in the Superconducting Condensate Density of Cuprate High-TcSuperconductors at a Unique Doping State

Autor:	Andrzej Golnik, Christian Bernhard, J. L. Tallon, T. Blasius, Ch. Niedermayer
Rok vydání:	2001
Předmět:	Superconductivity Physics Effective mass (solid-state physics) Condensed matter physics Condensed Matter::Superconductivity Doping General Physics and Astronomy Thermal fluctuations Condensed Matter::Strongly Correlated Electrons Cuprate Normal state Ground state Pseudogap
Zdroj:	Physical Review Letters. 86:1614-1617
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.86.1614
Popis:	The doping dependence of the ratio of the superconducting condensate density to the effective mass, n(o)(s)/m(*)(ab), was studied in detail by muon-spin rotation for Y(0.8)Ca(0.2)Ba(2)(Cu(1-z)Zn(z))(3)O(7-delta) and Tl(0.5-y)Pb(0.5+y)Sr(2)Ca(1-x)Y(x)Cu(2)O(7). Our data show that n(o)(s)/m(*)(ab) exhibits a peak at a unique doping state in the overdoped regime. Its position coincides with the critical doping state, where the normal state pseudogap was reported to appear and to deplete the electronic density of states. This finding implies that the pseudogap primarily arises from a change in the electronic ground state rather than from thermal fluctuations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::717bb878586124c581aed5a4d0f324d7 https://doi.org/10.1103/physrevlett.86.1614 Zobrazit plný text záznamu