TY - JOUR
T1 - Zn-induced spin dynamics in overdoped La 2-xSr xCu 1-yZn yO 4
AU - Wilson, Stephen D.
AU - Yamani, Z.
AU - Dhital, Chetan
AU - Freelon, B.
AU - Freeman, P. G.
AU - Fernandez-Baca, J. A.
AU - Yamada, K.
AU - Wakimoto, S.
AU - Buyers, W. J.L.
AU - Birgeneau, R. J.
PY - 2012/1/17
Y1 - 2012/1/17
N2 - Spin fluctuations and the local spin susceptibility in isovalently Zn-substituted La 2-xSr xCu 1-yZn yO 4 (x=0.25, y ≈ 0.01) are measured via inelastic neutron-scattering techniques. As Zn2 + is substituted onto the Cu2 +-sites, an anomalous enhancement of the local spin susceptibility χ ′′(ω) appears due to the emergence of a commensurate antiferromagnetic excitation centered at wave vector Q =(π,π,0) that coexists with the known incommensurate spin-density wave excitations at Q HK=(π±δ,π),(π, π±δ). Our results support a picture of Zn-induced antiferromagnetic (AF) fluctuations appearing through a local staggered polarization of Cu2 + spins, and the simultaneous suppression of T c as AF fluctuations are slowed in proximity to Zn impurities suggests the continued importance of high-energy AF fluctuations at the far overdoped edge of superconductivity in the cuprates.
AB - Spin fluctuations and the local spin susceptibility in isovalently Zn-substituted La 2-xSr xCu 1-yZn yO 4 (x=0.25, y ≈ 0.01) are measured via inelastic neutron-scattering techniques. As Zn2 + is substituted onto the Cu2 +-sites, an anomalous enhancement of the local spin susceptibility χ ′′(ω) appears due to the emergence of a commensurate antiferromagnetic excitation centered at wave vector Q =(π,π,0) that coexists with the known incommensurate spin-density wave excitations at Q HK=(π±δ,π),(π, π±δ). Our results support a picture of Zn-induced antiferromagnetic (AF) fluctuations appearing through a local staggered polarization of Cu2 + spins, and the simultaneous suppression of T c as AF fluctuations are slowed in proximity to Zn impurities suggests the continued importance of high-energy AF fluctuations at the far overdoped edge of superconductivity in the cuprates.
UR - https://www.scopus.com/pages/publications/84856481654
U2 - 10.1103/PhysRevB.85.014507
DO - 10.1103/PhysRevB.85.014507
M3 - Article
AN - SCOPUS:84856481654
SN - 1098-0121
VL - 85
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 1
M1 - 014507
ER -