Naslov
Optical and thermodynamic properties of the high-temperature superconductor HgBa2CuO4+delta

Autori
Van Heumen, E. ; Lortz, R. ; Kuzmenko, A.B. ; Carbone, F. ; van der Marel, D. ; Zhao, X. ; Yu, G. ; Cho, Y. ; Barišić, Neven ; Greven, M. ; Homes, C.C. ; Đorđević, S.V.

Izvornik
Physical Review B - Condensed Matter and Materials Physics (1098-0121) 75 (2006); 054522-1

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

Ključne riječi
YBa2Cu3O6+delta

Sažetak
In- and out-of-plane optical spectra and specific heat measurements for the single layer cuprate superconductor HgBa2CuO4+delta (Hg-1201) at optimal doping (T-c=97 K) are presented. Both the in-plane and out-of-plane superfluid density agree well with a recently proposed scaling relation rho(s)proportional to sigma T-dc(c). It is shown that there is a superconductivity induced increase of the in-plane low frequency spectral weight which follows the trend found in underdoped and optimally doped Bi2Sr2CaCu2O8+delta (Bi-2212) and optimally doped Bi2Sr2Ca2Cu3O10+delta (Bi-2223). We observe an increase of optical spectral weight which corresponds to a change in kinetic energy Delta W approximate to 0.5 meV/Cu which is more than enough to explain the condensation energy. The specific heat anomaly is 10 times smaller than in YBa2Cu3O6+delta (YBCO) and 3 times smaller than in Bi-2212. The shape of the anomaly is similar to the one observed in YBCO showing that the superconducting transition is governed by thermal fluctuations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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