Naslov
Unconventional charge order in a co-doped high-Tc superconductor

Autori
Pelc, Damjan ; Vučković, Marija ; Grafe, Hans-Joachim ; Baek, Seung-Ho ; Požek, Miroslav

Izvornik
Nature communications (2041-1723) 7 (2016); 12775, 7

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

Ključne riječi
high temperature superconductivity ; charge order ; stripes ; nematic phase

Sažetak
Charge-stripe order has recently been established as an important aspect of cuprate high-Tc superconductors. However, owing to the complex interplay between competing phases and the influence of disorder, it is unclear how it emerges from the parent high-temperature state. Here we report on the discovery of an unconventional ordered phase between charge-stripe order and (pseudogapped) metal in the cuprate La1.8-xEu0.2SrxCuO4. We use three complementary experiments—nuclear quadrupole resonance, nonlinear conductivity and specific heat— to demonstrate that the order appears through a sharp phase transition and exists in a dome-shaped region of the phase diagram. Our results imply that the new phase is a state, which preserves translational symmetry: a charge nematic. We thus resolve the process of charge-stripe development in cuprates, show that this nematic phase is distinct from high- temperature pseudogap and establish a link with other strongly correlated electronic materials with prominent nematic order.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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