Nematic and spin-charge orders driven by hole-doping a charge-transfer insulator

Recent experimental discoveries have brought a diverse set of broken symmetry states to the center stage of research on cuprate superconductors. Here, we focus on a thematic understanding of the diverse phenomenology by exploring a strong-coupling mechanism of symmetry breaking driven by frustration...

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Bibliographic Details
Published in:New journal of physics 2014-09, Vol.16 (9), p.93057-19
Main Authors: Fischer, Mark H, Wu, Si, Lawler, Michael, Paramekanti, Arun, Kim, Eun-Ah
Format: Article
Language:English
Subjects:
Antiferromagnetism
Atomic force microscopy
Broken symmetry
Charge transfer
Copper
Couplings
cuprates
frustated antiferromagnetism
Frustration
Insulators
Nematic
Phase diagrams
Phenomenology
Physics
spin-charge order
Symmetry
three-orbital model
Unit cell
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Summary:Recent experimental discoveries have brought a diverse set of broken symmetry states to the center stage of research on cuprate superconductors. Here, we focus on a thematic understanding of the diverse phenomenology by exploring a strong-coupling mechanism of symmetry breaking driven by frustration of antiferromagnetic (AFM) order. We achieve this through a variational study of a three-band model of the CuO2 plane with Kondo type exchange couplings between doped oxygen holes and classical copper spins. Two main findings from this strong-coupling multi-band perspective are (1) that the symmetry hierarchy of spin stripe, charge stripe, intra-unit-cell nematic order and isotropic phases are all accessible microscopically within the model, (2) many symmetry-breaking patterns compete with energy differences within a few meV per Cu atom to produce a rich phase diagram. These results indicate that the diverse phenomenology of broken-symmetry states in hole-doped AFM charge-transfer insulators may indeed arise from hole-doped frustration of antiferromagnetism.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/16/9/093057