Naslov
Anisotropic properties, pseudogap and superconducting gap opening in Hg1201 determined by microwave measurements

Autori
Grbić M. S. ; Požek M. ; Dulčić A. ; Barišić N.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, stručni

Izvornik
Abstracts of Ampere NMR School 19.-28. June 2008., Poznan/Wierzba, Poland / Jurga, Stefan - Poznań : Adam Mieckiewicz University, 2008

Skup
Ampere NMR School

Mjesto i datum
Poznań, Poljska, 19.06.2008. - 27.06.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
microwaves; superconductors; anisotropy

Sažetak
Measurements of surface impedance on optimally doped HgBa2CuO4 single crystal (Tc = 95 K) were performed using a resonant microwave method. By changing the configurations of the microwave electric and magnetic fields we observed various absorption signals - signatures of anisotropic normal state conductivity sigma(ab) and sigma(c). An external DC magnetic field was applied in two orientations: Hdc ||c and Hdc || ab , and the estimate of the upper critical field in them reveals anisotropy of the GL coherence length gamma = 10. Temperature dependence was measured up to 300 K, and a characteristic temperature T* was observed around 180 K indicating a pseudogap opening temperature. Temperature measurements in magnetic field Hdc || c reveal interesting feature of superconducting fluctuations up to 105 K.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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