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Birgeneau, R. J.; Skalyo, J.; Shirane, G.

doi:10.1103/physrevb.3.1736

Cited by 170 publications

(40 citation statements)

References 29 publications

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“…Under the assumption that all of the measurements are probing the same CDW correlations, it has been proposed that the X-ray measurements might be integrating over fluctuating CDW correlations, which would not be detectable by NMR 48,49 . There are problems with such an interpretation, however, a recent study 50 has shown that the integrated intensity of a CDW peak in YBa 2 Cu 3 O 6.6 is quite similar to one in charge-stripe-ordered La 1 NiO 4 , our results directly demonstrate that charge-stripe fluctuations exist far above T co , whereas elastic X-ray scattering measurements 16 lost the signal by T co þ 20 K. This strongly suggests that the X-ray studies of YBa 2 Cu 3 O 6 þ x are measuring static correlations. (Note that recent inelastic X-ray scattering measurements 51 have narrowed the possible energy range of fluctuations to something less than 1 meV.)…”

Section: Discussionmentioning

confidence: 99%

Direct observation of dynamic charge stripes in La2–xSrxNiO4

Anissimova

Parshall

et al. 2014

Nat Commun

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The insulator-to-metal transition continues to be a challenging subject, especially when electronic correlations are strong. In layered compounds, such as La 2-x Sr x NiO 4 and La 2-x Ba x CuO 4 , the doped charge carriers can segregate into periodically spaced charge stripes separating narrow domains of antiferromagnetic order. Although there have been theoretical proposals of dynamically fluctuating stripes, direct spectroscopic evidence of charge-stripe fluctuations has been lacking. Here we report the detection of critical lattice fluctuations, driven by charge-stripe correlations, in La 2-x Sr x NiO 4 using inelastic neutron scattering. This scattering is detected at large momentum transfers where the magnetic form factor suppresses the spin fluctuation signal. The lattice fluctuations associated with the dynamic charge stripes are narrow in q and broad in energy. They are strongest near the charge-stripe melting temperature. Our results open the way towards the quantitative theory of dynamic stripes and for directly detecting dynamical charge stripes in other strongly correlated systems, including high-temperature superconductors such as La 2-x Sr x CuO 4 .

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Section: Discussionmentioning

confidence: 99%

Direct observation of dynamic charge stripes in La2–xSrxNiO4

Anissimova

Parshall

et al. 2014

Nat Commun

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“…The peak position and peak shape are quite similar to those observed above T N due to a 2D magnetic ordering. However, the coexistence of 2D short-range and 3D long-range magnetic orderings is not expected in classical 2D systems like K 2 CoF 4 (T N = 107.72 K) 17 and K 2 NiF 4 (T N = 97.23 K), 18 where the 2D magnetic ordering fully converts to 3D ordering at T N so that the diffuse broad peak disappears when the sharp magnetic…”

Section: Resultsmentioning

confidence: 95%

Two- and three-dimensional magnetic correlations in the spin-12square-lattice systemZn2VO
Yusuf
¹
,
Bera
²
,
Kini
³

et al. 2010
Phys. Rev. B
23
6
36
1
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The magnetic correlations in the quasi-two dimensional spin-1/2 square-lattice system Zn 2 VO(PO 4 ) 2 have been investigated by neutron diffraction technique. A long-range antiferromagnetic (AFM) ordering below 3.75 K (T N ) has been observed with a reduced moment of 0.66(2) μ B per V ion at 1.5 K. In a given ab plane, the AFM spin arrangement is Néel type and the AFM layers are coupled ferromagnetically along the c axis. Remarkably, we have observed a pure 2D short-range AFM ordering in the ab plane above T N . Interestingly, the coexistence of diffuse magnetic scattering and three dimensional antiferromagnetic Bragg peaks has been found below T N , indicating the presence of spin-waves as confirmed by our calculation using the linear spin-wave theory. The observed results are discussed in the light of existing theory for a two-dimensional spin-1/2 square-lattice system.

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“…The width of the Gaussian component of the Voigt function was fixed to the experimental Q resolution determined from measurements on nearby nuclear Bragg reflections. The Lorentzian component represents the classical Ornstein-Zernike form for the energy-integrated neutron cross-section [22,23]: Table 2 List of calculated I calc and experimentally observed I obs intensities for the 17 independent magnetic reflections in CsDy(MoO 4 ) 2 at T = 035 . K The Lorentzian widths k (reciprocal correlation lengths) and temperature-adjusted amplitudes A were refined to best-fit the data.…”

Section: Magnetic Critical Scatteringmentioning

confidence: 99%

Neutron scattering study of the layered Ising magnet CsDy(MoO4)2

Khatsko

Zheludev

Tranquada

et al. 2004

Low Temperature Physics

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The quasi-two-dimensional antiferromagnet CsDy(MoO 4 ) 2 is studied by neutron diffraction and quasielastic neutron scattering. The crystal structure of two low-temperature phases (below 120 K and below 40 K) is determined. An approximate structure of the magnetically ordered phase . ( . ) were determined. Comparing these results to the exact solution for a 2D Ising magnet we conclude that, although 2D behavior is apparent in CsDy(MoO 4 ) 2 , there are deviations from the simple 2D Ising model.

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Critical Magnetic Scattering inK2NiF4

Cited by 170 publications

References 29 publications

Direct observation of dynamic charge stripes in La2–xSrxNiO4

Direct observation of dynamic charge stripes in La2–xSrxNiO4

Two- and three-dimensional magnetic correlations in the spin-12square-lattice systemZn2VO
Yusuf
¹
,
Bera
²
,
Kini
³

et al. 2010
Phys. Rev. B
23
6
36
1
View full text Add to dashboard Cite

Neutron scattering study of the layered Ising magnet CsDy(MoO4)2

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Critical Magnetic Scattering inK2NiF4

Cited by 170 publications

References 29 publications

Direct observation of dynamic charge stripes in La2–xSrxNiO4

Direct observation of dynamic charge stripes in La2–xSrxNiO4

Two- and three-dimensional magnetic correlations in the spin-12square-lattice systemZn2VOYusuf1, Bera2, Kini3 et al. 2010Phys. Rev. B236361View full textAdd to dashboardCite

Neutron scattering study of the layered Ising magnet CsDy(MoO4)2

Contact Info

Product

Resources

About

Two- and three-dimensional magnetic correlations in the spin-12square-lattice systemZn2VO
Yusuf
¹
,
Bera
²
,
Kini
³

et al. 2010
Phys. Rev. B
23
6
36
1
View full text Add to dashboard Cite