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arXiv · 1406.2711

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

Mark H. Fischer·Si Wu·Michael Lawler·Arun Paramekanti·Eun-Ah Kim
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Abstract

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 order. We achieve this through a variational study of a three-band model of the CuO$_2$ 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 antiferromagnetic charge-transfer insulators may indeed arise from hole-doped frustration of antiferromagnetism.

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Mark H. Fischer, Si Wu, Michael Lawler, Arun Paramekanti, Eun-Ah Kim. 2014-06-10. Nematic and spin-charge orders driven by hole-doping a charge-transfer insulator. https://doi.org/10.1088/1367-2630/16/9/093057

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