Incommensurate charge fluctuations in a d-wave superconductor

Khee-Kyun Voo; W. C. Wu; Jian-Xin Li; T. K. Lee

doi:10.1103/PhysRevB.61.9095

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Incommensurate charge fluctuations in a d-wave superconductor

Khee-Kyun Voo, W. C. Wu, Jian-Xin Li, T. K. Lee

DOI 10.1103/PhysRevB.61.9095 · Physical Review B

T1

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Abstract

Charge fluctuations are investigated in a dx2−y2-wave superconductor. Using a t−t′ tight-binding band, twin peaks show up around the incommensurate q=(π±δ0,π±δ0) and (π±δ0,π∓δ0) at low frequencies which shift to q=(π,π±δ) and (π±δ,π) when the frequency is above a threshold ω1. When the frequency is above another threshold ω2 (>ω1), more intense peaks appear at q=(π±δ′,π±δ′) and (π±δ′,π∓δ′). These incommensurate charge fluctuations have fairly distinct features when comparing to spin fluctuations and are fundamentally different from what should occur in a charge stripe phase.

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
YBa2Cu3O6+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown