Naslov
Thermoelectric Power: A Simple, Instructive Probe of High-Tc Superconductors

Autori
Tallon, J.L. ; Cooper, J.R. ; De Silva, P.S.I.P.N ; Williams, G.V.M. ; Loram, J.W.

Izvornik
Physical review letters (0031-9007) 75 (1995), 22; 4114-4117

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
electronic specific-heat ; YBA2CU3O6+X ; 300-K

Sažetak
The thermoelectric power S(T) is studied for YBa2Cu3O7−δ and YBa2Cu4O8 as a function of Zn substitution and hole concentration p. A strong enhancement in S(T) is correlated with the smooth opening of an energy gap in the normal-state spectrum, as observed from NMR and heat capacity data, which appears to be responsible for the p-dependent variation in Tc. The data are consistent with the local suppression of this energy gap in the immediate neighborhood of a Zn atom. Studies of S(T) provide a simple means to explore the energy scales associated with the superconducting phase diagram and give some key insights into the origins of cuprate superconductivity.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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