Magnetic Correlations in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>La</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>CoO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>Studied by Neutron Scattering: Possible Evidence for Stripe Phases

Cwik, M.; Benomar, M.; Finger, T.; Sidis, Y.; Senff, D.; Reuther, M.; Lorenz, T.; Braden, M.

doi:10.1103/physrevlett.102.057201

Cited by 71 publications

(88 citation statements)

References 27 publications

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“…• to the CoO bonds, which is attributable to the self-organization of holes into arrays of charged stripes, which creates antiphase domain walls in the antiferromagnetic order [20]. The stripe order in La 5/3 Sr 1/3 CoO 4 involves diagonal lines of nonmagnetic S = 0 Co 3+ ions separated by bands of antiferromagnetically aligned Co 2+ S = 3/2 ions, with intra-(J ) and interstripe (J ) antiferromagnetic exchange couplings as shown in Fig.…”

Section: Use Policymentioning

confidence: 99%

Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO
Lancaster
¹
,
Giblin
²
,
Allodi
³

et al. 2014
Phys. Rev. B
16
2
22
1
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Citation for published item:vnsterD F nd qilinD FF nd ellodiD q F nd fordignonD F nd wzzniD wF nd he enziD F nd preemnD FqF nd fkerD FtF nd rttD pFvF nd fkevihD F nd flundellD FtF nd foothroydD eFF nd w¤ ollerD tFF nd rhkrnD hF @PHIRA 9tripe disorder nd dynmis in the holeEdoped ntiferromgneti insultor vSGQrIGQgoyRF9D hysil review fFD VW @PAF HPHRHS@AF Further information on publisher's website: eprinted with permission from the emerin hysil oietyX F vnsterD F F qilinD qF ellodiD F fordignonD wF wzzniD F he enziD F qF preemnD F tF fkerD pF vF rttD F fkevihD F tF flundellD eF F foothroydD tF F w¤ ollerD nd hF rhkrnD hysil eview fD VWD HPHRHS@AD PHIR PHIR y the emerin hysil oietyF eders my viewD rowseD ndGor downlod mteril for temporry opying purposes onlyD provided these uses re for nonommeril personl purposesF ixept s provided y lwD this mteril my not e further reproduedD distriutedD trnsmittedD modi(edD dptedD performedD displyedD pulishedD or sold in whole or prtD without prior written permission from the emerin hysil oietyF Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. We investigate the magnetic ordering and dynamics of the stripe phase of La 5/3 Sr 1/3 CoO 4 , a material shown to have an hourglass magnetic excitation spectrum. A combination of muon-spin relaxation, nuclear magnetic resonance, and magnetic susceptibility measurements strongly suggest that the physics is determined by a partially disordered configuration of charge and spin stripes whose frustrated magnetic degrees of freedom are dynamic at high temperature and which undergo an ordering transition around 35 K with coexisting dynamics that freeze out in a glassy manner as the temperature is further reduced.

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Section: Use Policymentioning

confidence: 99%

Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO
Lancaster
¹
,
Giblin
²
,
Allodi
³

et al. 2014
Phys. Rev. B
16
2
22
1
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“…Magnetic and charge ordering have been investigated by neutron scattering in La 2−x Sr x CoO 4 [125,126] and in Pr 2−x Ca x CoO 4 [127]. One has to dope to a higher level (x > 0.3) than in nickelates to obtain incommensurate spin order.…”

Section: Cobaltates and Manganitesmentioning

confidence: 99%

Spins, stripes, and superconductivity in hole-doped cuprates

Tranquada¹

2013

AIP Conference Proceedings

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Abstract. One of the major themes in correlated electron physics over the last quarter century has been the problem of high-temperature superconductivity in hole-doped copper-oxide compounds. Fundamental to this problem is the competition between antiferromagnetic spin correlations, a symptom of strong Coulomb interactions, and the kinetic energy of the doped carriers, which favors delocalization. After discussing some of the early challenges in the field, I describe the experimental picture provided by a variety of spectroscopic and transport techniques. Then I turn to the technique of neutron scattering, and discuss how it is used to determine spin correlations, especially in model systems of quantum magnetism. Neutron scattering and complementary techniques have determined the extent to which antiferromagnetic spin correlations survive in the cuprate superconductors. One experimental case involves the ordering of spin and charge stripes. I first consider related measurements on model compounds, such as La 2−x Sr x NiO 4+δ , and then discuss the case of La 2−x Ba x CuO 4 . In the latter system, recent transport studies have demonstrated that quasi-two-dimensional superconductivity coexists with the stripe order, but with frustrated phase order between the layers. This has led to new concepts for the coexistence of spin order and superconductivity. While the relevance of stripe correlations to high-temperature superconductivity remains a subject of controversy, there is no question that stripes are an intriguing example of electron matter that results from strong correlations.Keywords: superconductivity, antiferromagnetism, charge order, stripes, cuprates, nickelates, neutron scattering PACS: 78.70.Nx OPENING REMARKSCuprate superconductivity is a fascinating field, with an enormous literature. There have been a great many measurements done on a wide variety of cuprate families. There are numerous theoretical perspectives on the nature of these materials and on the mechanism of superconductivity.I approach this topic not as an unbiased outside observer, but as a participant who has been around from the beginning. My purpose here is not to present a balanced review of all work and perspectives in the field, as there would be too much to cover. Instead, I will present one story about hole-doped cuprates, based largely on experiment and especially on neutron scattering studies. Since one of the main advantages of neutrons is their ability to follow dynamic antiferromagnetic spin correlations, it should come as no surprise that they will play a key role in the story.I have tried to cite sufficient references (especially review articles) so that the curious reader can find further information and potentially a starting point in searching the broader literature. I have not attempted to cite all relevant work, as that would have been

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“…The real space pattern of charge order varies by material (6)(7)(8)(9), but a typically observed motif is some variety of charge stripes. Such stripes have been observed in cobaltites (10)(11)(12), cuprates (13)(14)(15), nickelates (16)(17)(18)(19), and manganites (20)(21)(22), albeit with highly materials-dependent configurations that hinge on a balance among Coulomb, lattice, and magnetic exchange energies. For instance, charge stripes in layered nickelates typically stagger themselves from layer to layer to reduce the collective electrostatic energy arising from the charge disproportionation (9,18).…”

mentioning

confidence: 99%

Stacked charge stripes in the quasi-2D trilayer nickelate La ₄ Ni ₃ O ₈

Zhang

Chen

Phelan

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

100

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The quasi-2D nickelate La 4 Ni 3 O 8 (La-438), consisting of trilayer networks of square planar Ni ions, is a member of the so-called T′ family, which is derived from the Ruddlesden-Popper (R-P) parent compound La 4 Ni 3 O 10−x by removing two oxygen atoms and rearranging the rock salt layers to fluorite-type layers. Although previous studies on polycrystalline samples have identified a 105-K phase transition with a pronounced electronic and magnetic response but weak lattice character, no consensus on the origin of this transition has been reached. Here, we show using synchrotron X-ray diffraction on high-pO 2 floating zone-grown single crystals that this transition is associated with a real space ordering of charge into a quasi-2D charge stripe ground state. The charge stripe superlattice propagation vector, q = (2/3, 0, 1), corresponds with that found in the related 1/3-hole doped single-layer R-P nickelate, La 5/3 Sr 1/3 NiO 4 (LSNO-1/3; Ni 2.33+ ), with orientation at 45°to the Ni-O bonds. The charge stripes in La-438 are weakly correlated along c to form a staggered ABAB stacking that reduces the Coulomb repulsion among the stripes. Surprisingly, however, we find that the charge stripes within each trilayer of La-438 are stacked in phase from one layer to the next, at odds with any simple Coulomb repulsion argument.charge stripe | charge order | nickelate | strongly correlated materials | transition metal oxides C ompetition between localized and itinerant electron behavior is an organizing construct in our understanding of correlated electron transition metal oxide (TMO) physics (1-4). Some of the most compelling phenomenology in these materials occurs in the mixed valent state for the transition metal, which is set by composition, doping, and anion coordination of the metal. Many mixed valent TMOs adopt insulating "charge ordered" states, in which an inhomogeneous but long-range ordered configuration of the charge density condenses from a uniform metallic state (5). The real space pattern of charge order varies by material (6-9), but a typically observed motif is some variety of charge stripes. Such stripes have been observed in cobaltites (10-12), cuprates (13-15), nickelates (16)(17)(18)(19), and manganites (20-22), albeit with highly materials-dependent configurations that hinge on a balance among Coulomb, lattice, and magnetic exchange energies. For instance, charge stripes in layered nickelates typically stagger themselves from layer to layer to reduce the collective electrostatic energy arising from the charge disproportionation (9, 18).Indeed, the case of nickelates plays a prominent role in charge stripe physics (6-9, 16-19, 23-28), because mixed valent Ni 2+ (d 8 ) and Ni 3+ (d 7 ) compounds, such as La 2 − x Sr x NiO 4 (LSNO), are structurally and electronically related to high T c superconductors and thus, have been targeted as potential alternatives to the cuprates. Instead of superconductivity, however, the ground state of such quasi-2D, octahedrally coordinated nickelates is marked by stati...

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Magnetic Correlations inLa2−xSrxCoO4Studied by Neutron Scattering: Possible Evidence for Stripe Phases

Cited by 71 publications

References 27 publications

Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO
Lancaster
¹
,
Giblin
²
,
Allodi
³

et al. 2014
Phys. Rev. B
16
2
22
1
View full text Add to dashboard Cite

Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO
Lancaster
¹
,
Giblin
²
,
Allodi
³

et al. 2014
Phys. Rev. B
16
2
22
1
View full text Add to dashboard Cite

Spins, stripes, and superconductivity in hole-doped cuprates

Stacked charge stripes in the quasi-2D trilayer nickelate La ₄ Ni ₃ O ₈

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Magnetic Correlations inLa2−xSrxCoO4Studied by Neutron Scattering: Possible Evidence for Stripe Phases

Cited by 71 publications

References 27 publications

Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoOLancaster1, Giblin2, Allodi3 et al. 2014Phys. Rev. B162221View full textAdd to dashboardCite

Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoOLancaster1, Giblin2, Allodi3 et al. 2014Phys. Rev. B162221View full textAdd to dashboardCite

Spins, stripes, and superconductivity in hole-doped cuprates

Stacked charge stripes in the quasi-2D trilayer nickelate La 4 Ni 3 O 8

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Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO
Lancaster
¹
,
Giblin
²
,
Allodi
³

et al. 2014
Phys. Rev. B
16
2
22
1
View full text Add to dashboard Cite

Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO
Lancaster
¹
,
Giblin
²
,
Allodi
³

et al. 2014
Phys. Rev. B
16
2
22
1
View full text Add to dashboard Cite

Stacked charge stripes in the quasi-2D trilayer nickelate La ₄ Ni ₃ O ₈