Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Seo, Kangjun"'
Twisted bilayer graphene near the magic angle is known to have a cascade of insulating phases at integer filling factors of the low-energy bands. In this Letter we address the nature of these phases through an unrestricted, large-scale Hartree-Fock c
Externí odkaz:
http://arxiv.org/abs/2308.03843
Publikováno v:
Phys. Rev. Research 4, 013145 (2022)
Abstract We study a two-band dispersive Sachdev-Ye-Kitaev (SYK) model in 1 + 1 dimension. We suggest a model that describes a semimetal with quadratic dispersion at half-filling. We compute the Green's function at the saddle point using a combination
Externí odkaz:
http://arxiv.org/abs/2103.12110
Autor:
Seo, Kangjun1 (AUTHOR) kangjun.seo@ou.edu, Refai, Hazem H.1 (AUTHOR) hazem@ou.edu, Hile, Elizabeth S.2,3 (AUTHOR) hazem@ou.edu
Publikováno v:
Sensors (14248220). Jan2024, Vol. 24 Issue 2, p486. 15p.
Publikováno v:
Phys. Rev. Lett. 122, 246402 (2019)
We address the effective tight-binding Hamiltonian that describes the insulating Mott state of twisted graphene bilayers at a magic angle. In that configuration, twisted bilayers form a honeycomb superlattice of localized states, characterized by the
Externí odkaz:
http://arxiv.org/abs/1812.02550
Publikováno v:
Phys. Rev. B 99, 104503 (2019)
We address the possible emergence of spin triplet superconductivity in CrO$_{2}$ bilayers, which are half-metals with fully spin-polarized conducting bands. Starting from a lattice model, we show that chiral $p+ip$ states compete with non-chiral $p$-
Externí odkaz:
http://arxiv.org/abs/1803.05571
Publikováno v:
Phys. Rev. B 97, 201101 (2018)
We address the role of short range interactions for spinless fermions in the hyperhoneycomb lattice, a three dimensional (3D) structure where all sites have a planar trigonal connectivity. For weak interactions, the system is a line-node semimetal. I
Externí odkaz:
http://arxiv.org/abs/1708.02965
Autor:
Uchoa, Bruno, Seo, Kangjun
Publikováno v:
Phys. Rev. B 96, 220503 (2017)
We address the superconducting singlet state of anisotropic Dirac fermions that disperse linearly in one direction and parabolically in the other. For systems that have uniaxial anisotropy, we show that the electromagnetic response to an external mag
Externí odkaz:
http://arxiv.org/abs/1704.08780
Publikováno v:
Phys. Rev. B 96, 174502 (2017)
The rapid progress in quantum technology enables the implementation of artificial many-body systems with correlated photons and polaritons. A multiconnected Jaynes-Cummings (MCJC) lattice can be constructed by connecting qubits and cavities alternati
Externí odkaz:
http://arxiv.org/abs/1702.01922
Publikováno v:
Phys. Rev. B 95, 205107 (2017)
We investigate the effect of spin-orbit coupling on the in-gap bound states localized at magnetic impurities in multi-band superconductors with unconventional (sign-changed) and conventional (sign-unchanged) $s$-wave pairing symmetry, which may be re
Externí odkaz:
http://arxiv.org/abs/1512.03450
Autor:
Seo, Kangjun, Tian, Lin
Publikováno v:
SCPMA 58, 070302 (2015)
The connectivity and tunability of superconducting quantum devices provide a rich platform to build quantum simulators and study novel many-body physics. Here we study quantum phase transition in a detuned multi-connected Jaynes-Cummings lattice, whi
Externí odkaz:
http://arxiv.org/abs/1505.07997