Condensed Matter

   

Insulator with Conducting Edges

Authors: George Rajna

Physicists at the University of Zurich are researching a new class of materials: Higher-order topological insulators. [35] One can also imagine making a superconducting transistor out of graphene, which you can switch on and off, from superconducting to insulating. That opens many possibilities for quantum devices." [34] A team of scientists has detected a hidden state of electronic order in a layered material containing lanthanum, barium, copper, and oxygen (LBCO). [33] Now in a new study, researchers have discovered the existence of a positive feedback loop that gratly enhances the superconductivity of cuprates and may shed light on the origins of high-temperature cuprate superconductivity— considered one of the most important open questions in physics. [33] Using ultracold atoms, researchers at Heidelberg University have found an exotic state of matter where the constituent particles pair up when limited to two dimensions. [32] Neutron diffraction at the Australian Centre for Neutron Scattering has clarified the absence of magnetic order and classified the superconductivity of a new next-generation of superconductors in a paper published in Europhysics Letters. [31] A potential new state of matter is being reported in the journal Nature, with research showing that among superconducting materials in high magnetic fields, the phenomenon of electronic symmetry breaking is common. [30] Researchers from the University of Geneva (UNIGE) in Switzerland and the Technical University Munich in Germany have lifted the veil on the electronic characteristics of high-temperature superconductors. Their research, published in Nature Communications, shows that the electronic densities measured in these superconductors are a combination of two separate effects. As a result, they propose a new model that suggests the existence of two coexisting states rather than competing ones postulated for the past thirty years, a small revolution in the world of superconductivity. [29]

Comments: 35 Pages.

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[v1] 2018-06-02 04:10:35

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