Characterization of heavily Cu-doped<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:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CuO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>by transmission electron microscopy and electron energy loss spectros

Gao, Min; Liu, Peng; Dong, Xianlin; Liu, G. D.; Zhao, Zhongxian

doi:10.1103/physrevb.62.5413

Cited by 24 publications

(42 citation statements)

References 57 publications

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“…This is not surprising since the d-wave dimer becomes bound atā = 0. For single-channel interactions with a van der Waals tail, −C 6 r −6 , the d- wave dimer always becomes bound at a scattering length a = 4π/[Γ(1/4)] 2 ≈ 0.956 r vdW as predicted by Gao [76]. This prediction has been confirmed by Wang et al [45] using the Lennard-Jones potential as a two-body interaction.…”

Section: A Shallow Square Wellsupporting

confidence: 53%

Finite-range effects in Efimov physics beyond the separable approximation

et al. 2019

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We study Efimov physics for three identical bosons interacting via a pairwise square-well potential, analyze the validity of the separable approximation as a function of the interaction strength, and investigate what is needed to improve this approximation. We find separable approximations to be accurate for potentials with just one (nearly) bound dimer state. For potentials with more bound or almost bound dimer states, these states need to be included for an accurate determination of the Efimov spectrum and the corresponding three-body observables. We also show that a separable approximation is insufficient to accurately compute the trimer states for energies larger than the finite-range energy even when the two-body T matrix is highly separable in this energy regime. Additionally, we have analyzed three distinct expansion methods for the full potential that give exact results and thus improve on the separable approximation. With these methods, we demonstrate the necessity to include higher partial-wave components of the off-shell two-body T matrix in the three-body calculations. Moreover, we analyze the behavior of the Efimov states near the atomdimer threshold and observe the formation of non-Efimovian trimer states as the potential depth is increased. Our results can help to elaborate simpler theoretical models that are capable of reproducing the correct three-body physics in atomic systems.

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Section: A Shallow Square Wellsupporting

confidence: 53%

Finite-range effects in Efimov physics beyond the separable approximation

et al. 2019

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“…(5)- (7) as a function of the magnetic field. We note that the analytic theory developed by Gao [54,55] predicts that the p-wave scattering volume diverges, as a function of the magnetic field B, exactly at a(B) = 2ā, and the d-wave scattering length at a(B) =ā. Figure 2 shows the magnetic field dependence of the scattering lengths for an exemplary Feshbach resonance characterized by the width ∆ = 0.1G.…”

Section: Atomic Scattering In a Quasi-1d Waveguidementioning

confidence: 75%

Magnetic-field gradiometer based on ultracold collisions

et al. 2018

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We present a detailed analysis of the usefulness of ultracold atomic collisions for sensing the strength of an external magnetic field as well as its spatial gradient. The core idea of the sensor, which we recently proposed in K. Jachymski et al., Phys. Rev. Lett. 120, 013401 (2018), is to probe the transmission of the atoms through a set of quasi-one-dimensional waveguides that contain an impurity. Magnetic field-dependent interactions between the incoming atoms and the impurity naturally lead to narrow resonances that can act as sensitive field probes since they strongly affect the transmission. We illustrate our findings with concrete examples of experimental relevance, demonstrating that for large atom fluences N a sensitivity of the order of 1 nT/ √ N for the field strength and 100 nT/(mm √ N ) for the gradient can be reached with our scheme.

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“…O K for polycrystalline La 2 O 3 is shown in Ref. 16 with no indication of the phase analyzed. The only work that discusses O K ELNES of rare earth sesquioxides, among them h-La 2 O 3 , was on the basis of fine structure obtained a long time ago with limited energy resolution.…”

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confidence: 99%