Pixley, J.H.Cai, AngSi, Qimiao2016-06-102016-06-102015Pixley, J.H., Cai, Ang and Si, Qimiao. "Cluster extended dynamical mean-field approach and unconventional superconductivity." <i>Physical Review B,</i> 91, no. 12 (2015) American Physical Society: 125127. http://dx.doi.org/10.1103/PhysRevB.91.125127.https://hdl.handle.net/1911/90503The extended dynamical mean-field theory has played an important role in the study of quantum phase transitions in heavy-fermion systems. In order to incorporate the physics of unconventional superconductivity, we develop a cluster version of the extended dynamical mean-field theory. In this approach, we show how magnetic order and superconductivity develop as a result of intersite spin-exchange interactions, and analyze in some detail the form of correlation functions. We also discuss the methods that can be used to solve the dynamical equations associated with this approach. Finally, we consider different settings in which our approach can be applied, including the periodic Anderson model for heavy-fermion systems.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttp://dx.doi.org/10.1103/PhysRevB.91.125127