Static charge-density-wave order in the superconducting state of 
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Thampy, Vivek; Chen, X. M.; Cao, Yue; Mazzoli, Claudio; Barbour, Andi; Hu, Wen; Miao, Hu; Fabbris, G.; Zhong, Ruidan; Gu, Genda; Tranquada, J. M.; Robinson, Ian; Wilkins, S. B.; Dean, M. P. M.

doi:10.1103/physrevb.95.241111

Cited by 17 publications

(9 citation statements)

References 61 publications

(83 reference statements)

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“…In a statically ordered system, jFðτÞj will remain unchanged, while speckle dynamics causes it to drop as a function of the time delay. Distinct from La 2−x Ba x CuO 4 (LBCO), in which the CO is static over a timescale of at least 2 h [33,34], jFðτÞj in LSNO decays after several minutes for both CO and SO, indicating charge and spin dynamics (Fig. 3).…”

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confidence: 99%

“…The problem has also been addressed via model Hamiltonian analysis that suggested that lattice coupling might be crucial to stabilize stripes [31,32]. The implementation of resonant x-ray photon correlation spectroscopy (XPCS) at modern lowemittance synchrotron sources opens new routes to directly probe stripe formation and dynamics [33][34][35][36].…”

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confidence: 99%

“…To elucidate the temporal stabilities of CO and SO, we employ XPCS to study the domain distribution and its fluctuations. In XPCS, the coherent photons scattered by different domains interfere with each other, leading to a complex "speckle" pattern modulated by the usual diffraction line shape [33,34,36,[50][51][52]. Figures 2(a) and 2(b) show the representative speckles of the CO and SO superlattice peaks at 70 K. The shape of the peak envelope is determined by the spatial correlations and instrument geometry.…”

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confidence: 99%

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Charge Condensation and Lattice Coupling Drives Stripe Formation in Nickelates

et al. 2021

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Revealing the predominant driving force behind symmetry breaking in correlated materials is sometimes a formidable task due to the intertwined nature of different degrees of freedom. This is the case for La 2−x Sr x NiO 4þδ , in which coupled incommensurate charge and spin stripes form at low temperatures. Here, we use resonant x-ray photon correlation spectroscopy to study the temporal stability and domain memory of the charge and spin stripes in La 2−x Sr x NiO 4þδ . Although spin stripes are more spatially correlated, charge stripes maintain a better temporal stability against temperature change. More intriguingly, charge order shows robust domain memory with thermal cycling up to 250 K, far above the ordering temperature. These results demonstrate the pinning of charge stripes to the lattice and that charge condensation is the predominant factor in the formation of stripe orders in nickelates.

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Charge Condensation and Lattice Coupling Drives Stripe Formation in Nickelates

et al. 2021

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“…Such an approach has been used extensively to study the average CDW properties [5][6][7][8][9][29][30][31]. The very high coherent flux (10 13 photons/s) at the 23-ID-1 beam line at the National Synchrotron Light Source II opens up the possibility of observing coherent interference between the domains of a weakly scattering order parameter such as cuprate CDWs [32,33]. This was configured to produce a beam of approximately 20 µm at the sample overfilling the 10 µm pinhole in the Au mask attached to the sample (see Methods).…”

Section: Althoughmentioning

confidence: 99%

Charge density wave memory in a cuprate superconductor

et al. 2019

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Although CDW correlations are a ubiquitous feature of the superconducting cuprates, their disparate properties suggest a crucial role for pinning the CDW to the lattice. Here, we report coherent resonant X-ray speckle correlation analysis, which directly determines the reproducibility of CDW domain patterns in La 1.875 Ba 0.125 CuO 4 (LBCO 1/8) with thermal cycling. While CDW order is only observed below 54 K, where a structural phase transition creates inequivalent Cu-O bonds, we discover remarkably reproducible CDW domain memory upon repeated cycling to far higher temperatures. That memory is only lost on cycling to 240(3) K, which recovers the four-fold symmetry of the CuO 2 planes. We infer that the structural features that develop below 240 K determine the CDW pinning landscape below 54 K. This opens a view into the complex coupling between charge and lattice degrees of freedom in superconducting cuprates.

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“…The existence of CDWs in high-T c oxides has been recently confirmed by various experimental methods, including direct scanning-tunnel-microscopy (STM) and x-ray diffraction ones. In particular, CDWs were revealed in holedoped La 2−xBax CuO 4 [49], YBa 2 Cu 3 O 7−δ [16,[50][51][52][53][54][55][56][57][58][59][60], Bi 2 Sr 2−xLax CuO 6+δ [61], (Bi, Pb) 2 Sr 2 CuO 6+δ [62], and Bi 2 Sr 2 CaCuO 8+δ [16,56,[63][64][65][66] cuprates, as well as in electron-doped Nd 2−x Ce x CuO 4 ones [67]. The observed CDWs have either a unidirectional (stripe-like) or a bidirectional (checkerboard-like) structure.…”

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confidence: 99%

Quasiparticle conductance-voltage characteristics for break junctions involvingd-wave superconductors: charge-density-wave effects

Ekino¹,

Gabovich²,

Li³

et al. 2017

J. Phys.: Condens. Matter

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Quasiparticle tunnel conductance-voltage characteristics (CVCs), [Formula: see text], were calculated for break junctions (BJs) made up of layered d-wave superconductors partially gapped by charge-density waves (CDWs). The current is assumed to flow in the ab-plane of electrodes. The influence of CDWs is analyzed by comparing the resulting CVCs with CVCs calculated for BJs made up of pure d-wave superconductors with relevant parameters. The main CDW-effects were found to be the appearance of new CVC peculiarities and the loss of CVC symmetry with respect to the V-sign. Tunnel directionality was shown to be one of the key factors in the formation of [Formula: see text] dependences. In particular, the orientation of electrodes with respect to the current channel becomes very important. As a result, [Formula: see text] can acquire a large variety of forms similar to those for tunnel junctions between superconductors with s-wave, d-wave, and mixed symmetry of their order parameters. The diversity of peculiarities is especially striking at finite temperatures. In the case of BJs made up of pure d-wave superconductors, the resulting CVC can include a two-peak gap-driven structure. The results were compared with the experimental BJ data for a number of high-T oxides. It was shown that the large variety of the observed current-voltage characteristics can be interpreted in the framework of our approach. Thus, quasiparticle tunnel currents in the ab-plane can be used as an additional mean to detect CDWs competing with superconductivity in cuprates or other layered superconductors.

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Static charge-density-wave order in the superconducting state of La2−xBaxCuO4

Cited by 17 publications

References 61 publications

Charge Condensation and Lattice Coupling Drives Stripe Formation in Nickelates

Charge Condensation and Lattice Coupling Drives Stripe Formation in Nickelates

Charge density wave memory in a cuprate superconductor

Quasiparticle conductance-voltage characteristics for break junctions involvingd-wave superconductors: charge-density-wave effects

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