XRD spectra of new YBaCuO superconductors

Spectra of some new extended corona

For two graphs $mathrm{G}$ and $mathrm{H}$ with $n$ and $m$ vertices, the corona $mathrm{G}circmathrm{H}$ of $mathrm{G}$ and $mathrm{H}$ is the graph obtained by taking one copy of $mathrm{G}$ and $n$ copies of $mathrm{H}$ and then joining the $i^{th}$ vertex of $mathrm{G}$ to every vertex in the $i^{th}$ copy of $mathrm{H}$. The neighborhood corona $mathrm{G}starmathrm{H}$ of $mathrm{G}$ and $...

Magnetic Irreversibility and Resistive Transition in YBaCuO Superconductors: Interpretations and Possible Correlations

Tunneling spectra for (dx2−y2 + is)-wave superconductors versus tunneling spectra for (dx2−y2 + idxy)-wave superconductors

The tunneling conductance spectra of a normal metal / insulator / singlet superconductor is calculated from the reflection amplitudes using the BlonderTinkham-Klapwijk (BTK) formulation. The pairing symmetry of the superconductor is assumed to be dx2−y2 + is, or dx2−y2 + idxy. It is found that in the (dx2−y2 + is)-wave case there is a well defined conductance peak in the conductance spectra, in...

Spectra of Some New Graph Operations and Some New Class of Integral Graphs

In this paper, we define duplication corona, duplication neighborhood corona and duplication edge corona of two graphs. We compute their adjacency spectrum, Laplacian spectrum and signless Laplacian. As an application, our results enable us to construct infinitely many pairs of cospectral graphs and also integral graphs.

Andreev and single-particle tunneling spectra of underdoped cuprate superconductors.

We study tunneling spectroscopy between a normal metal and an underdoped cuprate superconductor modeled by a phenomenological theory in which the pseudogap is a precursor to the undoped Mott insulator. In the low barrier tunneling limit, the spectra are enhanced by Andreev reflection only within a voltage region of the small superconducting energy gap. In the high barrier tunneling limit, the s...