Two-magnon Raman scattering in cuprates: Evidence for antiferromagnetic fluctuations in cuprate superconductors

G. Blumberg; M. V. Klein

doi:10.1016/0921-4534(94)91774-4

Two-magnon Raman scattering in cuprates: Evidence for antiferromagnetic fluctuations in cuprate superconductors

G. Blumberg, M. V. Klein

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We report observation and resonance-Raman studies of spin-pair excitations in Y Ba₂Cu₃O_6+x (0.37 < x < 0.7) and YBa₂Cu₄O₈ superconductors. These citations at energy ∼ 3J (2700±150 cm^-1), similar to two-magnon excitations in insulators, are evidence that antiferromagnetic fluctuations with spatial extent of at least three lattice constants are not overdamped in the underdoped superconductors. With optimal hole doping, where T_c>80 K, and in the overdoped TlBa₂CuO₆ superccconductors the two-magnon peak can no longer be seen above the flat Raman continuum.

Original language	English (US)
Pages (from-to)	1099-1100
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	235-240
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4534(94)91774-4
State	Published - Dec 1994
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Two-magnon Raman scattering in cuprates: Evidence for antiferromagnetic fluctuations in cuprate superconductors",

abstract = "We report observation and resonance-Raman studies of spin-pair excitations in Y Ba2Cu3O6+x (0.37 < x < 0.7) and YBa2Cu4O8 superconductors. These citations at energy ∼ 3J (2700±150 cm-1), similar to two-magnon excitations in insulators, are evidence that antiferromagnetic fluctuations with spatial extent of at least three lattice constants are not overdamped in the underdoped superconductors. With optimal hole doping, where Tc>80 K, and in the overdoped TlBa2CuO6 superccconductors the two-magnon peak can no longer be seen above the flat Raman continuum.",

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year = "1994",

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doi = "10.1016/0921-4534(94)91774-4",

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T1 - Two-magnon Raman scattering in cuprates

T2 - Evidence for antiferromagnetic fluctuations in cuprate superconductors

AU - Blumberg, G.

AU - Klein, M. V.

PY - 1994/12

Y1 - 1994/12

N2 - We report observation and resonance-Raman studies of spin-pair excitations in Y Ba2Cu3O6+x (0.37 < x < 0.7) and YBa2Cu4O8 superconductors. These citations at energy ∼ 3J (2700±150 cm-1), similar to two-magnon excitations in insulators, are evidence that antiferromagnetic fluctuations with spatial extent of at least three lattice constants are not overdamped in the underdoped superconductors. With optimal hole doping, where Tc>80 K, and in the overdoped TlBa2CuO6 superccconductors the two-magnon peak can no longer be seen above the flat Raman continuum.

AB - We report observation and resonance-Raman studies of spin-pair excitations in Y Ba2Cu3O6+x (0.37 < x < 0.7) and YBa2Cu4O8 superconductors. These citations at energy ∼ 3J (2700±150 cm-1), similar to two-magnon excitations in insulators, are evidence that antiferromagnetic fluctuations with spatial extent of at least three lattice constants are not overdamped in the underdoped superconductors. With optimal hole doping, where Tc>80 K, and in the overdoped TlBa2CuO6 superccconductors the two-magnon peak can no longer be seen above the flat Raman continuum.

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DO - 10.1016/0921-4534(94)91774-4

M3 - Article

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VL - 235-240

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JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - PART 2

ER -

Two-magnon Raman scattering in cuprates: Evidence for antiferromagnetic fluctuations in cuprate superconductors

Abstract

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