Absence of static loop-current magnetism at the apical oxygen site in HgBa2CuO4+δ from NMR

A. M. Mounce; Sangwon Oh; Jeongseop A. Lee; W. P. Halperin; A. P. Reyes; P. L. Kuhns; M. K. Chan; C. Dorow; L. Ji; D. Xia; X. Zhao; M. Greven

doi:10.1103/PhysRevLett.111.187003

Absence of static loop-current magnetism at the apical oxygen site in HgBa₂CuO_4+δ from NMR

A. M. Mounce, Sangwon Oh, Jeongseop A. Lee, W. P. Halperin, A. P. Reyes, P. L. Kuhns, M. K. Chan, C. Dorow, L. Ji, D. Xia, X. Zhao, M. Greven

Physics and Astronomy (Twin Cities)

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Abstract

The simple structure of HgBa₂CuO_4+δ (Hg1201) is ideal among cuprates for study of the pseudogap phase as a broken symmetry state. We have performed O17 nuclear magnetic resonance on an underdoped Hg1201 crystal with a transition temperature of 74 K to look for circulating loop currents proposed theoretically and inferred from neutron scattering. The narrow spectra preclude static local fields in the pseudogap phase at the apical site, suggesting that the moments observed with neutrons are fluctuating. The nuclear magnetic resonance frequency shifts are consistent with a dipolar field from the Cu2⁺ site.

Original language	English (US)
Article number	187003
Journal	Physical review letters
Volume	111
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.111.187003
State	Published - Nov 1 2013

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10.1103/PhysRevLett.111.187003

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title = "Absence of static loop-current magnetism at the apical oxygen site in HgBa2CuO4+δ from NMR",

abstract = "The simple structure of HgBa2CuO4+δ (Hg1201) is ideal among cuprates for study of the pseudogap phase as a broken symmetry state. We have performed O17 nuclear magnetic resonance on an underdoped Hg1201 crystal with a transition temperature of 74 K to look for circulating loop currents proposed theoretically and inferred from neutron scattering. The narrow spectra preclude static local fields in the pseudogap phase at the apical site, suggesting that the moments observed with neutrons are fluctuating. The nuclear magnetic resonance frequency shifts are consistent with a dipolar field from the Cu2+ site.",

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AU - Mounce, A. M.

AU - Oh, Sangwon

AU - Lee, Jeongseop A.

AU - Halperin, W. P.

AU - Reyes, A. P.

AU - Kuhns, P. L.

AU - Chan, M. K.

AU - Dorow, C.

AU - Ji, L.

AU - Xia, D.

AU - Zhao, X.

AU - Greven, M.

PY - 2013/11/1

Y1 - 2013/11/1

N2 - The simple structure of HgBa2CuO4+δ (Hg1201) is ideal among cuprates for study of the pseudogap phase as a broken symmetry state. We have performed O17 nuclear magnetic resonance on an underdoped Hg1201 crystal with a transition temperature of 74 K to look for circulating loop currents proposed theoretically and inferred from neutron scattering. The narrow spectra preclude static local fields in the pseudogap phase at the apical site, suggesting that the moments observed with neutrons are fluctuating. The nuclear magnetic resonance frequency shifts are consistent with a dipolar field from the Cu2+ site.

AB - The simple structure of HgBa2CuO4+δ (Hg1201) is ideal among cuprates for study of the pseudogap phase as a broken symmetry state. We have performed O17 nuclear magnetic resonance on an underdoped Hg1201 crystal with a transition temperature of 74 K to look for circulating loop currents proposed theoretically and inferred from neutron scattering. The narrow spectra preclude static local fields in the pseudogap phase at the apical site, suggesting that the moments observed with neutrons are fluctuating. The nuclear magnetic resonance frequency shifts are consistent with a dipolar field from the Cu2+ site.

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Absence of static loop-current magnetism at the apical oxygen site in HgBa₂CuO_4+δ from NMR

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