PIRSA:15110097

Determinant Quantum Monte Carlo Study of a Multi-orbital Electronic Model: Application to Nematic and Superconducting Order in FeSe

Dumitrescu, P. (2015). Determinant Quantum Monte Carlo Study of a Multi-orbital Electronic Model: Application to Nematic and Superconducting Order in FeSe. Perimeter Institute. https://pirsa.org/15110097

Dumitrescu, Philipp. Determinant Quantum Monte Carlo Study of a Multi-orbital Electronic Model: Application to Nematic and Superconducting Order in FeSe. Perimeter Institute, Nov. 30, 2015, https://pirsa.org/15110097 

          @misc{ pirsa_PIRSA:15110097,
            doi = {10.48660/15110097},
            url = {https://pirsa.org/15110097},
            author = {Dumitrescu, Philipp},
            keywords = {Condensed Matter},
            language = {en},
            title = {Determinant Quantum Monte Carlo Study of a Multi-orbital Electronic Model: Application to Nematic and Superconducting Order in FeSe},
            publisher = {Perimeter Institute},
            year = {2015},
            month = {nov},
            note = {PIRSA:15110097 see, \url{https://pirsa.org}}
          }

Philipp Dumitrescu

University of California System

Talk number
PIRSA:15110097
Collection
Talk Type
Subject
Abstract

The iron chalcogenide FeSe has attracted much recent interest due to a high superconducting transition in monolayer samples. In bulk samples, nematic order is seen without the presence of magnetic order, hinting at the importance of nematic order in determining the monolayer properties. More generally, there has been growing evidence of the importance of nematic fluctuations in a variety of strongly correlated high-temperature superconductors. We study an effective two band model of the iron-pnictides with interactions that capture the nematic ordering arising from spontaneous symmetry breaking between the two orbitals. These models are sign-problem free and can be simulated in an unbiased fashion using Determinant Quantum Monte Carlo. We find a variety of unexpected orders and consider the effects of the nematic fluctuations on superconductivity.