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Event 

Title:
Aline Ramires (ICTP/IFT-UNESP): The Concept of Superconducting Fitness
When:
28.09.2018 11.00 h
Where:
Sala de seminário, 5o andar da Torre Nova -
Categoría:
Seminários

Description

Seminário do grupo de Matéria Condensada

 

28/09 - Excepcionalmente 6a feira - 11h00
Sala 528 - 5o andar da torre nova
 
Palestrante:  Aline Ramires  (ICTP South American Institute for Fundamental Research/IFT-UNESP  )
 
Titulo: The Concept of Superconducting Fitness.
 
Resumo:
In this talk I introduce the concept of superconducting fitness, which allows us to make statements analogous to Anderson's theorems concerning the stability of different superconducting states. This concept can be applied to complex materials with several orbital, layer, sublattice or valley degrees of freedom. The superconducting fitness functions FA(k) and FC(k) give a direct measure of the robustness of the weak coupling instability and of the presence of detrimental terms in the normal state Hamiltonian, respectively. These two functions can be employed as a guide to engineer normal state Hamiltonians in order to favour or suppress superconducting order parameters with different symmetries and topological properties. To illustrate the applicability and power of this concept, I take you over the following examples: the putative chiral p-wave superconductor Sr2RuO4, the non-centrosymmetric heavy fermion CePt3Si, the hole doped iron pnictide KFe2Asand the doped topological insulator CuxBi2Se3.

Venue

Grupo:
Sala de seminário, 5o andar da Torre Nova

Description

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