Stripe formation

Another distinct property can be recognized in Fig. 13 a sometimes two iridium atoms in the second layer are coming close in a next neighbor configuration, as a result the imaged overlap of this situation manifests itself in the onset of a stripe formation (visible along the [Oil] direction e.g. in the lower right comer of Fig. 13a). 

Fig. 6 The competition between pseudo JT polarons (structured in stripes) and free quasi-particles gives rise to the QCP at T, which is found at the normalized critical doping = / c = 1 and normalized critical pressure = e/e = 1. Here = 0.25 belongs to the doping for stripe formation, and Ec = 0.4 is the optimal microstrain at a maximum inferred from EXAFS data. After [113]...

LacaUi, T., WUMnson, D., Harrison, L. Theoretical aspects of stripe formation in relation to Drosophila segmentation. Development 104(1), 105-113 (1988). http //dev. biologists.org/cgi/content/abstract/104/1/105... 

Painter, K.J., Maini, P.K., Othmer, H.G. Stripe formation in juvenile Pomacanthus explained by a generalized Turing mechanism with chemotaxis. Proc. Natl Acad. Sci. USA 96(10), 5549-5554 (1999). http //www.pnas.org/cgi/content/abstract/96/10/5549... 

Raman scattering as a function of 7.4. Phase separation due to stripe formation ... 

Shanna et al. (2000) discuss their results in conjunction with the stripe-phase scenario (Emery et al. 1997). The assignment of Ti to the stripe formation temperature where... 

The assignment of Ti as the stripe formation temperature helps to understand the increase of i/ex. with decreasing temperature (maximum between T] and T2, fig. 89, bottom). Bianconi et al. (1996) have found that the formation of stripes leads to two different regions having different lattice constants. Two different lattice constants would enhance the excess displacements. With fiirther decrease of temperature, Wex. decreases until it reaches T2. 

The influence of different screening parameters on the stripe formation can be seen in Fig. 6. The comparison between the ImM NaCl series and the series with lOmM NaCl shows that the stripe distance increases with decreasing particle interaction. As can be seen from Figs. 5 and 6 there is a relationship between pulling speed and stripe for-... 

Figure 10 Dissipative structures fonned in casting polymer solution (a) Benard cells and lingering instability fonned in chloroform solution of polyion complex of 1 and 11 (b) snapshots of stripe formation from the fingering instability at the three-phase line synchronized with receding front (c) regularly arrayed polymer dots formed by dewetting in the stripes.

Neutron scattering experiments also detected static charge stripes in the low-temperature tetragonal (LTT) phase of lanthanum cuprates Lai 6-. rNdo 4Ba tCu04 and La2- BajrCu04 [16-19]. One of the manifestations of the stripe formation is the anomalous suppression of superconductivity near the hole concentration x = in the latter crystal. A weaker... 

A variety of munerical methods have been used to elucidate the existence of phase separation in the groimd states of the Hubbard and models of the Cu-0 planes of cuprate perovskites. States with charge density waves (CDW), which can be interpreted as stripes, were obtained in Refs. [24-26,29-32] by using the mean-field approximation, the variational principle with the Gutzwiller-type variational fimctions, and the density matrix renormalization group calculations. However, the results of the Monte Carlo simulations [33-35] and cluster calculations [36,37] cast doubt on this finding. Thus, the issue of whether a purely electronic mechanism can explain the stripe formation is still an open question. 

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