Naslov
CUPRATE SUPERCONDUCTORS 30 YEARS LATER - AN NMR VIEW

Autori
Požek, Miroslav

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

Izvornik
ADRIATIC NMR CONFERENCEMali Ston, Pelješac, 6–9 June 2019. BOOK OF ABSTRACTS / Namjesnik, Danijel ; Novak, Predrag ; Parlov Vuković, Jelena - Zagreb : Prirodoslovno-matematički fakultet Sveučilišta u Zagrebu, 2019, 26-26

ISBN
978-953-6076-56-7

Skup
Adriatic NMR 2019

Mjesto i datum
Mali Ston, Hrvatska, 06.06.2019. - 09.06.2019

Vrsta sudjelovanja
Plenarno

Vrsta recenzije
Recenziran

Ključne riječi
cuprate superconductors, nuclear magnetic resonance

Sažetak
Discovery of high-temperature superconductivity in the cuprates in 1986 marked a milestone for condensed matter science, triggering extraordinary efforts to understand the mechanism of unconventional superconductivity and to improve the properties of these new materials. It turned out that cuprates display extremely complex phase diagrams with a wealth of phases that may be related to or inhibit superconductivity. Additional complexity comes from disorder that is inherent to the perovskite structure of cuprates. Many issues remained unsolved, especially the mechanism of Cooper pairing, and the nature of the nonsuperconducting state.Soon after the discovery, cuprate superconductors have been extensively studied by NMR, with many important insights, including the discovery of a pseudogap - the most intriguing state of the phase diagram. After intensive research in the first years, the pace of NMR investigations has slowed down, but the technique continues to provide valuable new information. NMR is very sensitive to the local charge distribution due to the nuclear quadrupole interaction that measures the electric field gradient (EFG) at each nucleus, and is thus a versatile bulk probe. Recent NMR work on cuprates predominantly involves either charge ordering phenomena on long or meso-scales, or intra-unit-cell charge distribution between Cu and O ions. Charge order is an intriguing phenomenon ubiquitous in cuprates, but likely unrelated to superconductivity. On the other hand, the precise determination of intra-unit-cell charge distribution might bring new insights into the superconducting mechanism. An overview will be given of recent NMR results in cuprates with an outlook towards understanding the pairing mechanism.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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