Spatially modulated susceptibility in thin film 
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Davis, Samantha I.; Ullah, R. R.; Adamo, Carolina; Watson, Christopher A.; Kirtley, J. R.; Beasley, M. R.; Kivelson, Steven A.; Moler, Kathryn A.

doi:10.1103/physrevb.98.014506

Cited by 6 publications

(3 citation statements)

References 28 publications

(17 reference statements)

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“…On the experimental side, we note that there have, in fact, been measurements of magnetic susceptibility along a planar area of a thin film of cuprate material in the superconducting phase, e.g. [20]. Perhaps it is also feasible to compute the expectation value of Wilson loops of fixed area in the pseudogap phase.…”

Section: Discussionmentioning

confidence: 98%

Cuprates and center vortices: A QCD confinement mechanism in a high-Tc context

Greensite

Matsuyama

2020

Annals of Physics

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It is suggested that the center vortex confinement mechanism, familiar in hadronic physics, may have some relevance to high-T c phenomena. We focus specifically on the transition from the superconducting phase to the pseudogap phase. There is evidence of a vortex liquid in the latter phase, in which the pairing responsible for superconductivity still exists, but superconductivity itself does not. An analogy, drawn from particle physics, may be the Higgs to confinement phase transition in an SU(N) gauge theory, where the confined phase is a vortex liquid, and the Higgs phase is a phase of a broken global Z N symmetry. We illustrate this idea with numerical simulations of a spatially asymmetric U(1) gauge-Higgs model, with lattice artifact monopoles suppressed. We show the existence of a Higgs (superconductor) to confinement (vortex liquid) phase, explicitly identifying vortices in lattice configurations generated in the confined phase, and showing that they produce an area-law falloff in planar Wilson loops, which may be measurable experimentally. The superconducting phase is a phase of broken global Z 2 symmetry.

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Section: Discussionmentioning

confidence: 98%

Cuprates and center vortices: A QCD confinement mechanism in a high-Tc context

Greensite

Matsuyama

2020

Annals of Physics

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“…Bigger samples should lead to the same λ values. A more plausible explanation is that the phase transition starts in the form of wide superconducting filaments [18] or finite width sheets [19] in the planes, but disconnected in the third direction. Whether this is the case, or our result indicates a new type of phase transitions, requires further and more local experiments.…”

mentioning

confidence: 99%

Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint

et al. 2019

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A method to measure the superconducting (SC) stiffness tensor , without subjecting the sample to external magnetic field, is applied to La 1.875 Sr 0.125 CuO 4 . The method is based on the London equation , where J is the current density and A is the vector potential which is applied in the SC state. Using rotor free A and measuring J via the magnetic moment of superconducting rings, at T → T c is extracted. The technique is sensitive to very small stiffnesses (penetration depths on the order of a few millimeters). The method is applied to two different rings: one with the current running only in the CuO 2 planes, and another where the current must cross planes. We find different transition temperatures for the two rings, namely, there is a temperature range with two-dimensional stiffness. Additional low energy muon spin rotation measurements on the same sample determine the stiffness anisotropy at T < T c .

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“…On one hand, SrTiO 3 has a unique almost-ferroelectric state at low temperature (143), so it is possible that a ferroelectric state is induced near the interface, which may affect the electronic properties (152,153). On the other hand, structural domains also affect properties of systems without a ferroelectric instability (154,155). To answer these questions, it will be essential to gain control over domain formation in order to design samples for testing specific properties.…”

Section: Lattice Structure and Electronic Propertiesmentioning

confidence: 99%

Studying Quantum Materials with Scanning SQUID Microscopy

Persky

Sochnikov

Kalisky

2022

Annu. Rev. Condens. Matter Phys.

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Electronic correlations give rise to fascinating macroscopic phenomena such as superconductivity, magnetism, and topological phases of matter. Although these phenomena manifest themselves macroscopically, fully understanding the underlying microscopic mechanisms often requires probing on multiple length scales. Spatial modulations on the mesoscopic scale are especially challenging to probe, owing to the limited range of suitable experimental techniques. Here, we review recent progress in scanning superconducting quantum interference device (SQUID) microscopy. We demonstrate how scanning SQUID combines unmatched magnetic field sensitivity and highly versatile designs, by surveying discoveries in unconventional superconductivity, exotic magnetism, topological states, and more. Finally, we discuss how SQUID microscopy can be further developed to answer the increasing demand for imaging new quantum materials. Expected final online publication date for the Annual Review of Condensed Matter Physics, Volume 13 is March 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Spatially modulated susceptibility in thin film La2−xBaxCuO4

Cited by 6 publications

References 28 publications

Cuprates and center vortices: A QCD confinement mechanism in a high-Tc context

Cuprates and center vortices: A QCD confinement mechanism in a high-Tc context

Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint

Studying Quantum Materials with Scanning SQUID Microscopy

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