Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Submitted Manuscript

Publication Date

2017

Journal or Book Title

arXiv

Abstract

The complexity of the phase diagram of the cuprates goes well beyond its unique high-Tc superconducting state, as it hosts a variety of different electronic phenomena, such as the pseudogap, nematic order, charge order, and strange metallic behavior. The parent compound, however, is well understood as a Mott insulator, displaying quenched charge degrees of freedom and low-energy antiferromagnetic excitations described by the Heisenberg exchange coupling J. Here we show that doping holes in the oxygen orbitals inevitably generates another spin interaction - a biquadratic coupling - that must be included in the celebrated t−J model. While this additional interaction does not modify the linear spin wave spectrum, it promotes an enhanced nematic susceptibility that is peaked at a temperature scale determined by J. Our results explain several puzzling features of underdoped YBa2Cu3O7, such as the proximity of nematic and antiferromagnetic order, the anisotropic magnetic incommensurability, and the in-plane resistivity anisotropy. Furthermore, it naturally accounts for the absence of nematicity in electron-doped cuprates, and supports the idea that the pseudogap temperature is related to strong local antiferromagnetism.

Comments

This is a manuscript of the article

Orth, Peter P., Bhilahari Jeevanesan, Rafael M. Fernandes, Jörg Schmalian. "Enhanced nematic fluctuations near the Mott insulating phase of high-Tc cuprates." arXiv arXiv:1703.02210v1 (2017).

Copyright Owner

The Authors

Language

en

File Format

application/pdf

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