Chuck-Hou Yee edited cuprates1.tex  almost 8 years ago

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\subsection{Tuning the charge-transfer energy}  Turning to The cuprate superconductors are a classic example of correlate materials, where the sizable onsite Coulomb interaction on the copper 3$d$ orbitals is comparable with the kinetic energy of the electrons. Since  the cuprates, family of compounds exhibits the highest known superconducting transition temperatures at ambient pressure (superceded only by H$_3$S at extremely high pressures), they have been intensely studied since their discovery in the mid 1980s. Here, rather than pursuing low-energy model hamiltonians,  we wanted to design took  a new family chemical approach and asked how could the chemistry  of the  materials be leveraged  to tune the superconductivity.  Specifically, we ask what  chemical parameters. parameters are very to cross the coop rights to give transition temperatures ranging from below 40K to over 130K. Based on a combination of first principles calculations and dynamical meaning field theory to directly model the superconducting state, we found that varying the charge transfer energy to superconductivity.  Qualitative Idea. Reducing the charge transfer gap, increase Tc in cuprate like structures.  a) DMFT to compute gap.