Local Antiferromagnetic Correlations and dx2−y2d_{x^2-y^2} Pairing

The high $T_c$ cuprate superconductors doped near half-filling have short range antiferromagnetic correlations. Here we describe an intuitive local picture of why, if pairing occurs in the presence of short-range antiferromagnetic correlations, the orbital state will have $d_{x^2-y^2}$ symmetry.Comment: 8 pages and one figur

Solution of the Holstein polaron anisotropy problem

We study Holstein polarons in three-dimensional anisotropic materials. Using a variational exact diagonalization technique we provide highly accurate results for the polaron mass and polaron radius. With these data we discuss the differences between polaron formation in dimension one and three, and at small and large phonon frequency. Varying the anisotropy we demonstrate how a polaron evolves from a one-dimensional to a three-dimensional quasiparticle. We thereby resolve the issue of polaron stability in quasi-one-dimensional substances and clarify to what extent such polarons can be described as one-dimensional objects. We finally show that even the local Holstein interaction leads to an enhancement of anisotropy in charge carrier motion.Comment: 6 pages, 7 figures; extended version accepted for publication in Phys. Rev.

Understanding business valuation : a practical guide to valuing small to medium-sized businesses

https://egrove.olemiss.edu/aicpa_guides/1592/thumbnail.jp

Understanding business valuation : a practical guide to valuing small to medium-sized businesses

https://egrove.olemiss.edu/aicpa_guides/2736/thumbnail.jp

CPA\u27s guide to valuing a closely held business; Small business consulting; Consulting services practice aid 93-3

https://egrove.olemiss.edu/aicpa_guides/1595/thumbnail.jp