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Bond Current Antiferromagnetism


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Title Bond Current Antiferromagnetism
Title of Series Paul Bernays Lectures 2013
Number of Parts 3
Author Laughlin, Robert B.
License CC Attribution - NonCommercial - NoDerivatives 2.5 Switzerland:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
DOI 10.5446/36708
Publisher Eidgenössische Technische Hochschule (ETH) Zürich
Release Date 2013
Language English

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Subject Area Mathematics
Abstract In this talk I will review the growing body of evidence that a previously unknown order parameter, bond antiferromagnetism, is present in cuprate superconductors in a glassy form and is responsibile for much of their perplexing behavior, including particularly their pseudogap, doping asymmetry, weak spin polarization and violenty varying superfluid density. I shall argue that bond-current order competes with d-wave superconductivity in the cuprates the same way structural phase transitions compete with s-wave superconductivity in conventional metals, the ordered bond antiferromagnet being essentially a crystal of d-wave Cooper pairs. Its relevance to the cuprates is thus mainly as an impediment to achieving higher superconducting transition temperatures. However, it has wider relevance to engineering through oxide resistive memory, a vastly more important phenomenon presently of great interest to electronics manufacturers on account of its potential to replace flash memory.


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