Separation of the charge and spin densities in La1.885Sr0.115CuO4

Sugai, S.; Hayamizu, N.

doi:10.1016/s0022-3697(00)00123-2

Cited by 14 publications

(18 citation statements)

References 11 publications

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“…4 demonstrate that this expectation is indeed confirmed by our experiment. Within the experimental error, the twomagnon profile of La 2 CuO 4 (which again agrees very well with prior work on this system [17]) is unaffected by a 14 T field. These experimental cross-checks provide reassurance that the magnetic field effect we have observed for the two-magnon peak in La 1:88 Sr 0:12 CuO 4 is genuine.…”

supporting

confidence: 88%

“…In insulating antiferromagnetically ordered cuprates, a prominent twomagnon excitation peak is observed in Raman spectra at an energy of 2:3J [17]. The spectral weight of this peak is dominated by local spin-flip excitations near the Brillouin zone boundary of the antiferromagnet.…”

mentioning

confidence: 98%

“…The two peaks in the low temperature profile are also seen in the electronic Raman spectra of doped nickelates [19], where phases with ''stripe'' order of spin and charge are well documented. They have thus been ascribed to two-magnon excitations propagating along and perpendicular to the charged domain walls of a ''striped'' phase [17].…”

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confidence: 99%

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Large Magnetic Field-Induced Spectral Weight Enhancement of High-Energy Spin Excitations inLa1.88Sr0.12CuO4

2005

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We report electronic Raman scattering experiments on a superconducting La(1.88)Sr(0.12)CuO(4) single crystal in a magnetic field. At low temperatures, the spectral weight of the high-energy two-magnon peak increases linearly with field and is amplified by a factor of more than two at 14 T. The effect disappears at elevated temperatures and is not present in undoped La(2)CuO(4). This observation is discussed in terms of an electronically inhomogeneous state in which the field enhances the volume fraction of a phase with local antiferromagnetic order at the expense of the superconducting phase.

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confidence: 88%

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confidence: 98%

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Large Magnetic Field-Induced Spectral Weight Enhancement of High-Energy Spin Excitations inLa1.88Sr0.12CuO4

2005

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“…This feature is representative of the bi-magnon spectrum as observed in Raman spectra at the same energy scale [see, e.g, Refs. [118,119]], and it is present in both longitudinal (Figs. 9(b,d,f)) as well as transverse spectra (Figs.…”

Section: Spin-waves In the Sdw State At Finite Dopingmentioning

confidence: 99%

Intermediate coupling model of the cuprates

Das

Markiewicz

Bansil

2014

Advances in Physics

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We review the intermediate coupling model for treating electronic correlations in the cuprates. Spectral signatures of the intermediate coupling scenario are identified and used to adduce that the cuprates fall in the intermediate rather than the weak or the strong coupling limits. A robust, 'beyond LDA' framework for obtaining wide-ranging properties of the cuprates via a GW-approximation based self-consistent self-energy correction for incorporating correlation effects is delineated. In this way, doping and temperature dependent spectra, from the undoped insulator to the overdoped metal, in the normal as well as the superconducting state, with features of both weak and strong coupling can be modeled in a material-specific manner with very few parameters. Efficacy of the model is shown by considering available spectroscopic data on electron and hole doped cuprates from angle-resolved photoemission (ARPES), scanning tunneling microscopy/spectroscopy (STM/STS), neutron scattering, inelastic light scattering, optical and other experiments. Generalizations to treat systems with multiple correlated bands such as the heavy-fermions, the ruthenates, and the actinides are discussed.

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“…Whether this qualitative interpretation is correct or not remains to be seen. The detailed quantitative explanation of the resonant two‐magnon Raman scattering in the cuprates, in particular in the underdoped compounds,11, 15, 22, 35 requires further microscopic analysis.…”

Section: Two‐magnon Raman Scattering In the Cupratesmentioning

confidence: 99%

Resonant two‐magnon Raman scattering in high‐T_c cuprates

Kupčić

2010

J Raman Spectroscopy

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Resonance enhancement of one-phonon, two-phonon, and two-magnon Raman scattering in a general, exactly solvable, multiband model is explained in a way that is in accordance with the general analytical properties of the total optical conductivity tensor. Using this approach, the charge-transfer limit of the Emery three-band model is examined to explain resonance enhancement of the two-magnon Raman spectra of high-T c cuprates, which is found in experiments to be of 3 orders of magnitude. While previous Raman and optical conductivity analyzes of the cuprates, based on the single-band Hubbard model, are found to be consistent with the picture where one hole per one CuO 2 unit is localized on the Cu ion, the present three-band approach allows the study of the opposite, strong copper-oxygen hybridization limit, which is found to be in agreement with the results of nuclear magnetic resonance (NMR) and one-phonon Raman scattering experiments. Copyright

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Separation of the charge and spin densities in La1.885Sr0.115CuO4

Cited by 14 publications

References 11 publications

Large Magnetic Field-Induced Spectral Weight Enhancement of High-Energy Spin Excitations inLa1.88Sr0.12CuO4

Large Magnetic Field-Induced Spectral Weight Enhancement of High-Energy Spin Excitations inLa1.88Sr0.12CuO4

Intermediate coupling model of the cuprates

Resonant two‐magnon Raman scattering in high‐T_c cuprates

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Separation of the charge and spin densities in La1.885Sr0.115CuO4

Cited by 14 publications

References 11 publications

Large Magnetic Field-Induced Spectral Weight Enhancement of High-Energy Spin Excitations inLa1.88Sr0.12CuO4

Large Magnetic Field-Induced Spectral Weight Enhancement of High-Energy Spin Excitations inLa1.88Sr0.12CuO4

Intermediate coupling model of the cuprates

Resonant two‐magnon Raman scattering in high‐Tc cuprates

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Resonant two‐magnon Raman scattering in high‐T_c cuprates