Zobrazeno 1 - 10
of 174
pro vyhledávání: '"Bascones, E."'
Publikováno v:
Nature Communications 14, 5036 (2023)
Among the variety of correlated states exhibited by twisted bilayer graphene, cascades in the spectroscopic properties and in the electronic compressibility occur over larger ranges of energy, twist angle and temperature compared to other effects. Th
Externí odkaz:
http://arxiv.org/abs/2301.13024
Publikováno v:
Phys. Rev. B 106, L081123 (2022)
The nature of the correlated phases found in some graphene heterostructures is under debate. We use dynamical mean-field theory (DMFT) to analyze the effect of local correlations close to half-filling on one of such systems, the ABC trilayer graphene
Externí odkaz:
http://arxiv.org/abs/2202.13857
Autor:
Calderón, M. J., Bascones, E.
Publikováno v:
Phys. Rev. B 102, 155149 (2020)
We calculate the interactions between the Wannier functions of the 8-orbital model for twisted bilayer graphene (TBG). In this model, two orbitals per valley centered at the AA regions, the AA-p orbitals, account for the most part of the spectral wei
Externí odkaz:
http://arxiv.org/abs/2007.16051
Autor:
Calderón, M. J., Bascones, E.
Publikováno v:
npj Quantum Mater. 5, 57 (2020)
Moir\'e systems displaying flat bands have emerged as novel platforms to study correlated electron phenomena. Insulating and superconducting states appear upon doping magic angle twisted bilayer graphene (TBG), and there is evidence of correlation in
Externí odkaz:
http://arxiv.org/abs/1912.09935
Publikováno v:
Journal of Physics Communications 3, 035024, 2019
The recently observed superconductivity in twisted bilayer graphene emerges from insulating states believed to arise from electronic correlations. While there have been many proposals to explain the insulating behaviour, the commensurability at which
Externí odkaz:
http://arxiv.org/abs/1805.07303
Autor:
Pizarro, J. M., Bascones, E.
Publikováno v:
Phys. Rev. Materials 3, 014801 (2019)
BaFe2S3 is a special iron superconductor with two-leg ladder structure which can help to unravel the role played by the electronic correlations in high-Tc superconductivity. At zero pressure it is insulating with stripe antiferromagnetic (AF) order a
Externí odkaz:
http://arxiv.org/abs/1803.00282
Publikováno v:
Phys. Rev. B 95, 075115 (2017)
Undoped iron superconductors accommodate $n=6$ electrons in five d-orbitals. Experimental and theoretical evidence shows that the strength of correlations increases with hole-doping, as the electronic filling approaches half-filling with $n=5$ electr
Externí odkaz:
http://arxiv.org/abs/1610.09560
Autor:
Guterding, Daniel, Jeschke, Harald O., Mazin, I. I., Glasbrenner, J. K., Bascones, E., Valenti, Roser
Publikováno v:
Phys. Rev. Lett. 118, 017204 (2017)
Unconventional superconductivity in iron pnictides and chalcogenides has been suggested to be controlled by the interplay of low-energy antiferromagnetic spin fluctuations and the particular topology of the Fermi surface in these materials. Based on
Externí odkaz:
http://arxiv.org/abs/1610.08626
Publikováno v:
Phys. Rev. B 95, 144511 (2017)
The theoretical understanding of the nematic state of iron-based superconductors and especially of FeSe is still a puzzling problem. Although a number of experiments calls for a prominent role of local correlations and place iron superconductors at t
Externí odkaz:
http://arxiv.org/abs/1609.06672
Publikováno v:
Comptes Rendus Physique 17, 36-59 (2016)
High temperature superconductivity in iron pnictides and chalcogenides emerges when a magnetic phase is suppressed. The multi-orbital character and the strength of correlations underlie this complex phenomenology, involving magnetic softness and anis
Externí odkaz:
http://arxiv.org/abs/1503.04223