Doping dependence of the spatially modulated dynamical spin correlations and the superconducting-transition temperature in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mi mathvariant="normal">−</mml:mi><mml:mi mathvariant="italic">x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml

Yamada, K.; Lee, Chul‐Ho; Kurahashi, Kazuyoshi; Wada, J.; Wakimoto, Shuichi; Ueki, Sadato; Kimura, Hiroyuki; Endoh, Y.; Hosoya, S.; Shirane, G.; Birgeneau, R. J.; Greven, M.; Kastner, M. A.; Kim, Y. J.

doi:10.1103/physrevb.57.6165

Cited by 938 publications

(1,057 citation statements)

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“…The incommensurability (δ), which corresponds to the half distance between a pair of IC peaks, linearly increases with the hole concentration (p) and the IC wavevector changes from [110] to [100]/[010] direction in the tetragonal notation at p∼0.06. These observations are quite similar to the results for LSCO, but different from those for YBCO [4][5][6] , suggesting that the doping evolution of spin correlation is classified by the number of CuO 2 planes between the block layers. In this study, to gain further insights into the universality in the spin correlations in doped cuprate oxide, we measured the spin excitation in the SG phase of Bi 2.4 Sr 1.6 CuO 6+y (Bi2201) with p ∼ 0.06 up to a relatively high energy region (∼30 meV).…”

Section: Introductionsupporting

confidence: 71%

Magnetic Excitation in Lightly-Doped Bi_2.4Sr_1.6CuO₆₊_y

Tsutsumi¹,

Fujita²,

Enoki³

et al. 2014

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)

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We performed inelastic neutron scattering measurements in order to clarify the magnetic excitation of lightly-hole-doped Bi 2.4 Sr 1.6 CuO 6+y (Bi2201). At 7 K, a clear magnetic signal was observed up to 30 meV around (0.5, 0.5) reciprocal position, which corresponds to the antiferromagnetic zone center. The steeply extended excitation indicates the existence of high-energy spin excitation in the Bi2201 system, as was reported for La 2−x Sr x CuO 4 (LSCO). In the energy range between 10 meV and 30 meV, the intensity distribution in the momentum (h, k) plane is isotropic and the peak-width is wider than that in LSCO with the comparable hole-concentration. Furthermore, no well-defined inwardly dispersive excitation or the peak-sharpening with increasing the energy transfer was observed in the present Bi2201, unlike to the existence of hourglass-shaped excitation in LSCO.

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Section: Introductionsupporting

confidence: 71%

Magnetic Excitation in Lightly-Doped Bi_2.4Sr_1.6CuO₆₊_y

Tsutsumi¹,

Fujita²,

Enoki³

et al. 2014

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)

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“…Although both hole-doped and electron-doped cuprates have the layered structure of the square lattice of the CuO 2 plane separated by insulating layers [1][2][3] , the significantly difference of the electronic states between hole-doped and electron-doped cuprates is observed 4,5 , which reflects the electron-hole asymmetry. For the hole-doped cuprates, AFLRO is reduced dramatically with doping 1,6 , and vanished around the doping δ ∼ 0.05. But a series of inelastic neutron scattering measurements show that the incommensurate short AF correlation persists in the underdoped, optimally doped, and overdoped regimes 1,6 , then in low temperatures, the systems become superconducting (SC) over a wide range of the hole doping concentration δ, around the optimal doping δ ∼ 0.15 2,7 .…”

mentioning

confidence: 99%

“…For the hole-doped cuprates, AFLRO is reduced dramatically with doping 1,6 , and vanished around the doping δ ∼ 0.05. But a series of inelastic neutron scattering measurements show that the incommensurate short AF correlation persists in the underdoped, optimally doped, and overdoped regimes 1,6 , then in low temperatures, the systems become superconducting (SC) over a wide range of the hole doping concentration δ, around the optimal doping δ ∼ 0.15 2,7 . However, AFLRO survives until superconductivity appears over a narrow range of δ, around the optimal doping δ ∼ 0.15 in the electrondoped cuprates 3,8,9 .…”

mentioning

confidence: 99%

Asymmetry of the electron spectrum in hole-doped and electron-doped cuprates

Guo

Feng

2006

Physics Letters A

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Within the t-t ′ -J model, the asymmetry of the electron spectrum and quasiparticle dispersion in hole-doped and electron-doped cuprates is discussed. It is shown that the quasiparticle dispersions of both hole-doped and electron-doped cuprates exhibit the flat band around the (π, 0) point below the Fermi energy. The lowest energy states are located at the (π/2, π/2) point for the hole doping, while they appear at the (π, 0) point in the electron-doped case due to the electron-hole asymmetry. Our results also show that the unusual behavior of the electron spectrum and quasiparticle dispersion is intriguingly related to the strong coupling between the electron quasiparticles and collective magnetic excitations. 74.25.Jb, 74.62.Dh, The parent compounds of cuprate superconductors are believed to belong to a class of materials known as Mott insulators with an antiferromagnetic (AF) longrange order (AFLRO), then superconductivity emerges when charge carriers, holes or electrons, are doped into these Mott insulators 1-3 . Although both hole-doped and electron-doped cuprates have the layered structure of the square lattice of the CuO 2 plane separated by insulating layers 1-3 , the significantly difference of the electronic states between hole-doped and electron-doped cuprates is observed 4,5 , which reflects the electron-hole asymmetry. For the hole-doped cuprates, AFLRO is reduced dramatically with doping 1,6 , and vanished around the doping δ ∼ 0.05. But a series of inelastic neutron scattering measurements show that the incommensurate short AF correlation persists in the underdoped, optimally doped, and overdoped regimes 1,6 , then in low temperatures, the systems become superconducting (SC) over a wide range of the hole doping concentration δ, around the optimal doping δ ∼ 0.15 2,7 . However, AFLRO survives until superconductivity appears over a narrow range of δ, around the optimal doping δ ∼ 0.15 in the electrondoped cuprates 3,8,9 . In particular, the maximum achievable SC transition temperature in the electron-doped cuprates is much lower than that in the hole-doped case, and the commensurate spin response in the SC-state is observed 10 . These experimental observations show that the unconventional physical properties of both holedoped and electron-doped cuprates mainly depend on the extent of the doping concentration. Since many of the unconventional physical properties, including the relatively high SC transition temperature, have often been attributed to particular characteristics of low energy excitations determined by the electronic structure 1,4 , then a central issue to clarify the nature of the unconventional physical properties is how the electronic structure evolves with the doping concentration, From the angle-resolved photoemission spectroscopy (ARPES) measurements 4,11 , it has been shown that the electron spectral function A(k, ω) in doped cuprates is strongly momentum and doping dependent. For the hole doping, the charge carriers doped into the parent Mott insulators first enter into the k = [π/...

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“…For doped superconducting compositions, the low-energy (E & 20 meV) excitations of La 2ÿx Sr x CuO 4 are peaked at (1=2 , 1=2) and (1=2, 1=2 ) [13,14]. The low-energy incommensurability of the excitations increases with x and saturates with 0:125 [9,15]. It has recently been shown that E of La 2ÿx Sr x CuO 4 and La 2ÿx Ba x CuO 4 disperses [8,16,17] with energy and shows a minimum near E 50 meV.…”

mentioning

confidence: 99%

Persistence of High-Frequency Spin Fluctuations in Overdoped SuperconductingLa2−xSrxCuO4(x=
Lipscombe
¹
,
Hayden
²
,
Vignolle
³

et al. 2007
Phys. Rev. Lett.
97
22
104
1
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We report a detailed inelastic neutron scattering study of the collective magnetic excitations of overdoped superconducting La 1:78 Sr 0:22 CuO 4 for the energy range 0 -160 meV. Our measurements show that overdoping suppresses the strong response present for optimally doped La 2ÿx Sr x CuO 4 which is peaked near 50 meV. The remaining response is peaked at incommensurate wave vectors for all energies investigated. We observe a strong high-frequency magnetic response for E * 80 meV suggesting that significant antiferromagnetic exchange couplings persist well into the overdoped part of the cuprate phase diagram. DOI: 10.1103/PhysRevLett.99.067002 PACS numbers: 74.72.Dn, 74.25.Ha, 75.40.Gb, 78.70.Nx The occurrence of high-temperature superconductivity is widely believed to be connected to the cuprates' spin degrees of freedom [1]. Thus, we might expect strong spin fluctuations to coexist with superconductivity over the whole superconducting phase diagram. The spin excitations have been well characterized for the insulating antiferromagnetic (AF) [2] and lightly doped [3-6] compositions. For optimally doped compositions, structured excitations have been observed over a wide energy range [7,8]. However, little is known about the high-energy spin dynamics on the overdoped side of the cuprate phase diagram. One of the best materials to investigate this region is single layer La 2ÿx Sr x CuO 4 (LSCO). This system can be doped sufficiently to destroy the superconductive behavior [9], allowing the spin excitations to be studied across the entire superconducting dome. Studying the overdoped part of the phase diagram offers a different view on the emergence of the superconducting state. In contrast to the underdoped regime, superconductivity does not emerge from the ''pseudogap'' state [10]. Rather, it emerges from what appears to be a strongly correlated metallic state [11].In this Letter, we report an inelastic neutron scattering (INS) study of the magnetic response 00 q; ! of an overdoped superconducting sample over a wide energy range (0 -160 meV) and throughout the Brillouin zone. We have chosen the composition La 1:78 Sr 0:22 CuO 4 (T c 26 K), which shows a substantial drop in T c with respect to optimal doping but is nevertheless superconducting (see Fig. 1). We find that the spin excitations are dramatically modified from those observed at optimal doping: The strong peak in the local susceptibility 00 ! present [8] in La 1:84 Sr 0:16 CuO 4 near 50 meV is suppressed, and the remaining response is incommensurate and strongest around E 10 meV and E * 80 meV. Thus, strong spin excitations persist well into the overdoped region of the cuprate phase diagram as required by magnetically mediated models of superconductivity.La 1:78 Sr 0:22 CuO 4 has a tetragonal structure and we use tetragonal indexing to label reciprocal space Q ha ? kb ? lc ? . The magnetic excitations in LSCO are 2D as the strongest magnetic couplings are within the CuO 2 planes. Thus, usually we quote in-plane components of Q. In this notation, the p...

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Doping dependence of the spatially modulated dynamical spin correlations and the superconducting-transition temperature inLa2−xSr

Cited by 938 publications

References 30 publications

Magnetic Excitation in Lightly-Doped Bi_2.4Sr_1.6CuO₆₊_y

Magnetic Excitation in Lightly-Doped Bi_2.4Sr_1.6CuO₆₊_y

Asymmetry of the electron spectrum in hole-doped and electron-doped cuprates

Persistence of High-Frequency Spin Fluctuations in Overdoped SuperconductingLa2−xSrxCuO4(x=
Lipscombe
¹
,
Hayden
²
,
Vignolle
³

et al. 2007
Phys. Rev. Lett.
97
22
104
1
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Doping dependence of the spatially modulated dynamical spin correlations and the superconducting-transition temperature inLa2−xSr

Cited by 938 publications

References 30 publications

Magnetic Excitation in Lightly-Doped Bi2.4Sr1.6CuO6+y

Magnetic Excitation in Lightly-Doped Bi2.4Sr1.6CuO6+y

Asymmetry of the electron spectrum in hole-doped and electron-doped cuprates

Persistence of High-Frequency Spin Fluctuations in Overdoped SuperconductingLa2−xSrxCuO4(x=Lipscombe1, Hayden2, Vignolle3 et al. 2007Phys. Rev. Lett.97221041View full textAdd to dashboardCite

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Magnetic Excitation in Lightly-Doped Bi_2.4Sr_1.6CuO₆₊_y

Magnetic Excitation in Lightly-Doped Bi_2.4Sr_1.6CuO₆₊_y

Persistence of High-Frequency Spin Fluctuations in Overdoped SuperconductingLa2−xSrxCuO4(x=
Lipscombe
¹
,
Hayden
²
,
Vignolle
³

et al. 2007
Phys. Rev. Lett.
97
22
104
1
View full text Add to dashboard Cite