Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near Optimal Doping

M. K. Chan; Y. Tang; C. J. Dorow; J. Jeong; L. Mangin-Thro; M. J. Veit; Y. Ge; D. L. Abernathy; Y. Sidis; P. Bourges; M. Greven

doi:10.1103/PhysRevLett.117.277002

Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near Optimal Doping

M. K. Chan, Y. Tang, C. J. Dorow, J. Jeong, L. Mangin-Thro, M. J. Veit, Y. Ge, D. L. Abernathy, Y. Sidis, P. Bourges, M. Greven

Physics and Astronomy (Twin Cities)

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Abstract

We use neutron scattering to study magnetic excitations near the antiferromagnetic wave vector in the underdoped single-layer cuprate HgBa2CuO4+δ (superconducting transition temperature Tc≈88 K, pseudogap temperature T∗≈220 K). The response is distinctly enhanced below T∗ and exhibits a Y-shaped dispersion in the pseudogap state, whereas the superconducting state features an X-shaped (hourglass) dispersion and a further resonancelike enhancement. A large spin gap of about 40 meV is observed in both states. This phenomenology is reminiscent of that exhibited by bilayer cuprates. The resonance spectral weight, irrespective of doping and compound, scales linearly with the putative binding energy of a spin exciton described by an itinerant-spin formalism.

Original language	English (US)
Article number	277002
Journal	Physical review letters
Volume	117
Issue number	27
DOIs	https://doi.org/10.1103/PhysRevLett.117.277002
State	Published - Dec 29 2016

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© 2016 American Physical Society.

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Chan, M. K., Tang, Y., Dorow, C. J., Jeong, J., Mangin-Thro, L., Veit, M. J., Ge, Y., Abernathy, D. L., Sidis, Y., Bourges, P., & Greven, M. (2016). Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near Optimal Doping. Physical review letters, 117(27), Article 277002. https://doi.org/10.1103/PhysRevLett.117.277002

Chan, MK, Tang, Y, Dorow, CJ, Jeong, J, Mangin-Thro, L, Veit, MJ, Ge, Y, Abernathy, DL, Sidis, Y, Bourges, P & Greven, M 2016, 'Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near Optimal Doping', Physical review letters, vol. 117, no. 27, 277002. https://doi.org/10.1103/PhysRevLett.117.277002

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title = "Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near Optimal Doping",

abstract = "We use neutron scattering to study magnetic excitations near the antiferromagnetic wave vector in the underdoped single-layer cuprate HgBa2CuO4+δ (superconducting transition temperature Tc≈88 K, pseudogap temperature T∗≈220 K). The response is distinctly enhanced below T∗ and exhibits a Y-shaped dispersion in the pseudogap state, whereas the superconducting state features an X-shaped (hourglass) dispersion and a further resonancelike enhancement. A large spin gap of about 40 meV is observed in both states. This phenomenology is reminiscent of that exhibited by bilayer cuprates. The resonance spectral weight, irrespective of doping and compound, scales linearly with the putative binding energy of a spin exciton described by an itinerant-spin formalism.",

author = "Chan, {M. K.} and Y. Tang and Dorow, {C. J.} and J. Jeong and L. Mangin-Thro and Veit, {M. J.} and Y. Ge and Abernathy, {D. L.} and Y. Sidis and P. Bourges and M. Greven",

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doi = "10.1103/PhysRevLett.117.277002",

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T1 - Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near Optimal Doping

AU - Chan, M. K.

AU - Tang, Y.

AU - Dorow, C. J.

AU - Jeong, J.

AU - Mangin-Thro, L.

AU - Veit, M. J.

AU - Ge, Y.

AU - Abernathy, D. L.

AU - Sidis, Y.

AU - Bourges, P.

AU - Greven, M.

PY - 2016/12/29

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N2 - We use neutron scattering to study magnetic excitations near the antiferromagnetic wave vector in the underdoped single-layer cuprate HgBa2CuO4+δ (superconducting transition temperature Tc≈88 K, pseudogap temperature T∗≈220 K). The response is distinctly enhanced below T∗ and exhibits a Y-shaped dispersion in the pseudogap state, whereas the superconducting state features an X-shaped (hourglass) dispersion and a further resonancelike enhancement. A large spin gap of about 40 meV is observed in both states. This phenomenology is reminiscent of that exhibited by bilayer cuprates. The resonance spectral weight, irrespective of doping and compound, scales linearly with the putative binding energy of a spin exciton described by an itinerant-spin formalism.

AB - We use neutron scattering to study magnetic excitations near the antiferromagnetic wave vector in the underdoped single-layer cuprate HgBa2CuO4+δ (superconducting transition temperature Tc≈88 K, pseudogap temperature T∗≈220 K). The response is distinctly enhanced below T∗ and exhibits a Y-shaped dispersion in the pseudogap state, whereas the superconducting state features an X-shaped (hourglass) dispersion and a further resonancelike enhancement. A large spin gap of about 40 meV is observed in both states. This phenomenology is reminiscent of that exhibited by bilayer cuprates. The resonance spectral weight, irrespective of doping and compound, scales linearly with the putative binding energy of a spin exciton described by an itinerant-spin formalism.

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Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near Optimal Doping

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