Origin of hour-glass magnetic dispersion in underdoped cuprate superconductors

Y. A. Kharkov; O. P. Sushkov

doi:10.1103/PhysRevB.100.224510

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Origin of hour-glass magnetic dispersion in underdoped cuprate superconductors

Y. A. Kharkov, O. P. Sushkov

DOI 10.1103/PhysRevB.100.224510 · Physical Review B

T1

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Abstract

In this work we explain the hour-glass magnetic dispersion in underdoped cuprates. The dispersion arises due to the Lifshitz-type magnetic criticality. Superconductivity also plays a role, but the role is secondary. We list six major experimental observations related to the hour glass and explain all of them. The theory provides a unified picture of the evolution of magnetic excitations in various cuprate families, including “hour-glass” and “wine-glass” dispersions and an emergent static incommensurate order. We propose the Lifshitz spin-liquid “fingerprint” sum rule, and show that the latest data confirm the validity of the sum rule.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown