Loop currents in ladder cuprates: A dynamical mean field theory study
| Autor: | Xiancong Lu, David Sénéchal |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Hubbard model Strongly Correlated Electrons (cond-mat.str-el) Zero (complex analysis) FOS: Physical sciences 02 engineering and technology Solver 021001 nanoscience & nanotechnology 01 natural sciences Loop (topology) Condensed Matter - Strongly Correlated Electrons Dynamical mean field theory Quantum mechanics 0103 physical sciences Cluster (physics) Cuprate Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Energy (signal processing) |
| Popis: | We investigate the possibility of spontaneous loop currents in the two-leg ladder cuprate Sr$_{14-x}$Ca$_x$Cu$_{24}$O$_{41}$ by applying cluster dynamical mean field theory (CDMFT) to a seven-band Hubbard model for that compound, with an exact diagonalization solver. We sample several values of the local interaction $U_d$ and of the Cu-O energy difference $E_{pd}$, by applying an external field that induces loop currents. We find no instance of spontaneous loop currents once the external field is brought to zero. |
| Databáze: | OpenAIRE |
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