Naslov
Superconducting fluctuations and pseudogap in HgBa2CuO4+delta single crystals

Autori
Grbić, Mihael Srđan ; Barišić, Neven ; Požek, Miroslav ; Kupčić, Ivan ; Li, Yuan ; Zhao, Xudong ; Dressel, Martin ; Dulčić, Antonije ; Greven, Martin

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

Izvornik
429. WE-Heraeus-Seminar Microwaves for Condensed Matter Physics 2009 / Scheffler, Marc ; Dressel, Martin - Bad Honnef : Wilhelm und Else Heraeus-Stiftung, 2009

Skup
429. WE-Heraeus-Seminar Microwaves for Condensed Matter Physics 2009

Mjesto i datum
Bad Honnef, Njemačka, 05.04.2009. - 08.04.2009

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
microwaves; cuprate superconductors; pseudogap; fluctuations
(microwaves; cuprate superconductors; aisotropy)

Sažetak
New approach to microwave measurements of ab- and c-axes conductivity in nearly optimally doped HgBa2CuO4+delta single crystals evidence three characteristic temperatures. The pseudogap opens at T* approx 170K which is almost twice the superconducting critical temperature Tc = 94.3 K. The fluctuation regime of preformed Cooper pairs is observed above Tc in the c-axis conductivity, in particular by its magnetic-field dependence. It is confined to a narrow temperature range Tc < T < T' approx 105 K, far below T*, which enables unambiguous separation of T* and T'. Hence, our results support the distinction between the pseudogap formation and effects of the superconducting ordering.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA