Disorder-robust phase crystal in high-temperature superconductors stabilized by strong correlations
Artikel i vetenskaplig tidskrift, 2022

The simultaneous interplay of strong electron–electron correlations, topological zero-energy states, and disorder is yet an unexplored territory but of immense interest due to their inevitable presence in many materials. Copper oxide high-temperature superconductors (cuprates) with pair breaking edges host a flat band of topological zero-energy states, making them an ideal playground where strong correlations, topology, and disorder are strongly intertwined. Here we show that this interplay in cuprates generates a fully gapped ‘phase crystal’ state that breaks both translational and time-reversal invariance, characterized by a modulation of the d-wave superconducting phase co-existing with a modulating extended s-wave superconducting order. In contrast to conventional wisdom, we find that this phase crystal state is remarkably robust to omnipresent disorder, but only in the presence of strong correlations, thus giving a clear route to its experimental realization.


Debmalya Chakraborty

Uppsala universitet

Tomas Löfwander

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Mikael Fogelström

Chalmers, Mikroteknologi och nanovetenskap

Annica M. Black-Schaffer

Uppsala universitet

npj Quantum Materials

23974648 (eISSN)

Vol. 7 1 44



Annan materialteknik




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