Electronic correlations in quantum materials: inhomogeneities and frustration
Fundamental research in superconductivity and magnetism - systems potentially usef...
Characterizing thermomagnetic properties and crystal field excitations in rare-ear...
| Grant number: | 16/05069-7 |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| Start date: | August 01, 2016 |
| End date: | July 31, 2019 |
| Field of knowledge: | Physical Sciences and Mathematics - Physics - Condensed Matter Physics |
| Agreement: | Coordination of Improvement of Higher Education Personnel (CAPES) |
| Principal Investigator: | Eduardo Miranda |
| Grantee: | Vanuildo Silva de Carvalho |
| Host Institution: | Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil |
| Associated scholarship(s): | 17/16911-3 - Nematic quantum phase transition induced by transverse fields in strongly correlated electron systems, BE.EP.PD |
Abstract In this postdoc project, we describe in detail the key issues for the description of the electronic phase diagram of high-temperature superconductors known as cuprates. In this context, we emphasize the main difficulties for the understanding of the pseudogap phase and the non-Fermi liquid properties of the strange metal phase present in these materials and then propose several models based on the antiferromagnetic fluctuation mechanism for the description of the exotic properties of these phases through the calculation of transport properties such as, for instance, electrical and thermal conductivities. Another system we discuss in this project are the quantum spin liquid states. They are strongly correlated systems without long-range order, even in the regime of low temperatures that may have fractional excitations and topological order. In this case, models with strong spin-orbit interaction are one of the main candidates for the description of new quantum states with a phase transition to a Mott insulating phase. Due to this fact, we also intend to describe the transport properties of a stable phase of a spin-orbit model for double perovskites called chiral spin liquid in order to verify whether it describes the physics of the material Ba$_2$YMoO$_6$. The evaluation of transport properties for the models presented here will be based on the memory matrix method, since the theory describing cuprates and quantum spin liquids can flow to a strong coupling regime, with a complete breakdown of the description in terms of fermionic quasiparticles of the Fermi liquid theory. The last topics of this project include the schedule for its implementation, the way we disseminate the results and, finally, the corresponding references. (AU) | |
| News published in Agência FAPESP Newsletter about the scholarship: | |
| More itemsLess items | |
| TITULO | |
| Articles published in other media outlets ( ): | |
| More itemsLess items | |
| VEICULO: TITULO (DATA) | |
| VEICULO: TITULO (DATA) | |