Commensurate antiferromagnetic excitations as a signature of the pseudogap in the tetragonal high-Tc cuprate HgBa2CuO4+δ

被引：0

作者：

M. K. Chan

C. J. Dorow

L. Mangin-Thro

Y. Tang

Y. Ge

M. J. Veit

G. Yu

X. Zhao

A. D. Christianson

J. T. Park

Y. Sidis

P. Steffens

D. L. Abernathy

P. Bourges

M. Greven

机构：

[1] School of Physics and Astronomy,Quantum Condensed Matter Division

[2] University of Minnesota,undefined

[3] Pulsed Field Facility,undefined

[4] National High Magnetic Field Laboratory,undefined

[5] Los Alamos National Laboratory,undefined

[6] Laboratoire Léon Brillouin,undefined

[7] LLB/IRAMIS,undefined

[8] UMR12,undefined

[9] CEA-CNRS,undefined

[10] CEA-Saclay,undefined

[11] State Key Lab of Inorganic Synthesis and Preparative Chemistry,undefined

[12] College of Chemistry,undefined

[13] Jilin University,undefined

[14] Oak Ridge National Laboratory,undefined

[15] Forschungsneutronenquelle Heinz Maier-Leibnitz,undefined

[16] Institute Laue Langevin,undefined

[17] Present address: Department of Physics,undefined

[18] University of California,undefined

[19] San Diego,undefined

[20] 9500 Gilman Drive La Jolla,undefined

[21] California 92093,undefined

[22] USA ;,undefined

[23] Present address: Department of Physics,undefined

[24] Penn State University,undefined

[25] University Park,undefined

[26] Pennsylvania 16802,undefined

[27] USA ;,undefined

[28] Present address: Department of Applied Physics,undefined

[29] Stanford University,undefined

[30] Stanford,undefined

[31] California 94305,undefined

[32] USA ;,undefined

来源：

Nature Communications | / 7卷

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摘要：

Antiferromagnetic correlations have been argued to be the cause of the d-wave superconductivity and the pseudogap phenomena exhibited by the cuprates. Although the antiferromagnetic response in the pseudogap state has been reported for a number of compounds, there exists no information for structurally simple HgBa2CuO4+δ. Here we report neutron-scattering results for HgBa2CuO4+δ (superconducting transition temperature Tc≈71 K, pseudogap temperature T*≈305 K) that demonstrate the absence of the two most prominent features of the magnetic excitation spectrum of the cuprates: the X-shaped ‘hourglass’ response and the resonance mode in the superconducting state. Instead, the response is Y-shaped, gapped and significantly enhanced below T*, and hence a prominent signature of the pseudogap state.

引用

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