Ontology highlight
ABSTRACT:
SUBMITTER: Holmvall P
PROVIDER: S-EPMC5989275 | biostudies-literature | 2018 Jun
REPOSITORIES: biostudies-literature
Holmvall P P Vorontsov A B AB Fogelström M M Löfwander T T
Nature communications 20180606 1
Flat bands of zero-energy states at the edges of quantum materials have a topological origin. However, their presence is energetically unfavorable. If there is a mechanism to shift the band to finite energies, a phase transition can occur. Here we study high-temperature superconductors hosting flat bands of midgap Andreev surface states. In a second-order phase transition at roughly a fifth of the superconducting transition temperature, time-reversal symmetry and continuous translational symmetr ...[more]