Chemical Perspectives on Cuprate Superconductivity: Hole-Protected Spin Dimers as d Wave Cooper Pairs
Abstract
The observation that the coherence lengths in cuprate superconductors are extremely small motivated us to search for its real-space structure by examining the consequence of hole-doping in CuO4 units in cuprates. We analyzed aggregates of hole-doped CuO4 units that phase-separate from hole-doped CuO2 layers in terms of their segregation-pressure indices defined in this work. Our search suggests that each d-wave Cooper pair is an antiferromagnetically coupled spin dimer protected in an antiferromagnetic hole dimer (AHD), and that the antiferromagnetic chains of AHDs provide channels through which such spin dimers can move collectively without perturbation. Based on these suggestions and their implications, we examined the causes for several seemingly puzzling observations on cuprate superconductors to find that they are naturally explained by the suggestions.
Related
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BibTeX
@misc{whangbo2026chemical,
title = {{Chemical Perspectives on Cuprate Superconductivity: Hole-Protected Spin Dimers as d Wave Cooper Pairs}},
author = {Myung-Hwan Whangbo and Reinhard K. Kremer},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2608.30001},
eprint = {2608.30001},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.30001},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Chemical Perspectives on Cuprate Superconductivity: Hole-Protected Spin Dimers as d Wave Cooper Pairs
AU - Myung-Hwan Whangbo
AU - Reinhard K. Kremer
PY - 2026
DA - 2026/09/07
PB - arXiv
DO - 10.48550/arxiv.2608.30001
UR - https://arxiv.org/abs/2608.30001
AB - The observation that the coherence lengths in cuprate superconductors are extremely small motivated us to search for its real-space structure by examining the consequence of hole-doping in CuO4 units in cuprates. We analyzed aggregates of hole-doped CuO4 units that phase-separate from hole-doped CuO2 layers in terms of their segregation-pressure indices defined in this work. Our search suggests that each d-wave Cooper pair is an antiferromagnetically coupled spin dimer protected in an antiferromagnetic hole dimer (AHD), and that the antiferromagnetic chains of AHDs provide channels through which such spin dimers can move collectively without perturbation. Based on these suggestions and their implications, we examined the causes for several seemingly puzzling observations on cuprate superconductors to find that they are naturally explained by the suggestions.
ER -