Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Eickhoff, Fabian"'
Kondo breakdown in multi-orbital Anderson lattices induced by destructive hybridization interference
Autor:
Eickhoff, Fabian, Anders, Frithjof B.
Publikováno v:
SciPost Phys. 17, 069 (2024)
In this paper we consider a multi band extension to the periodic Anderson model. We use a single site DMFT(NRG) in order to study the impact of the conduction band mediated effective hopping of the correlated electrons between the correlated orbitals
Externí odkaz:
http://arxiv.org/abs/2401.04540
Autor:
Eickhoff, Fabian, Anders, Frithjof B.
Publikováno v:
Phys. Rev. B 104, 165105 (2021)
We investigate the real-space spectral properties of strongly-correlated multi-impurity arrays in the Kondo insulator regime. Employing a recently developed mapping onto an effective correlated cluster problem makes the problem accessible to the nume
Externí odkaz:
http://arxiv.org/abs/2107.12777
Autor:
Eickhoff, Fabian, Anders, Frithjof B.
Publikováno v:
Phys. Rev. B 104, 045115 (2021)
The emerging and screening of local magnetic moments in solids has been investigated for more than 60 years. Local vacancies as in graphene or in Heavy Fermions can induce decoupled bound states that lead to the formation of local moments. In this pa
Externí odkaz:
http://arxiv.org/abs/2104.03626
Autor:
Eickhoff, Fabian, Anders, Frithjof B.
Publikováno v:
Phys. Rev. B 102 (2020) 205132
We present a mapping of correlated multi-impurity Anderson models to a cluster model coupled to a number of effective conduction bands capturing its essential low-energy physics. The major ingredient is the complex single-particle self energy matrix
Externí odkaz:
http://arxiv.org/abs/2008.09034
Autor:
Barcza, Gergely, Bauerbach, Kevin, Eickhoff, Fabian, Anders, Frithjof B., Gebhard, Florian, Legeza, Örs
Publikováno v:
Phys. Rev. B 101, 075132 (2020)
We analyze the ground-state energy, local spin correlation, impurity spin polarization, impurity-induced magnetization, and corresponding zero-field susceptibilities of the symmetric single-impurity Kondo model on a tight-binding chain with bandwidth
Externí odkaz:
http://arxiv.org/abs/1911.08279
Autor:
Eickhoff, Fabian, Kolodzeiski, Elena, Esat, Taner, Fournier, Norman, Wagner, Christian, Deilmann, Thorsten, Temirov, Ruslan, Rohlfing, Michael, Tautz, F. Stefan, Anders, Frithjof B.
Publikováno v:
Phys. Rev. B 101, 125405 (2020)
We present an extension of the tunneling theory for scanning tunneling microcopy (STM) to include different types of vibrational-electronic couplings responsible for inelastic contributions to the tunnel current in the strong-coupling limit. It allow
Externí odkaz:
http://arxiv.org/abs/1910.09971
We show that the RKKY interaction in the two-impurity Anderson model comprise two contributions: a ferromagnetic part stemming from the symmetrized hybridization functions and an anti-ferromagnetic part. We demonstrate that this anti-ferromagnetic co
Externí odkaz:
http://arxiv.org/abs/1806.03130
Publikováno v:
Phys. Rev. B 96, 041109 (2017)
We show that the two-impurity Anderson model exhibits an additional quantum critical point at infinitely many specific distances between both impurities for an inversion symmetric one-dimensional dispersion. Unlike the quantum critical point previous
Externí odkaz:
http://arxiv.org/abs/1609.09750
Autor:
Eickhoff, Fabian
In dieser Arbeit werden verschiedene Quantenstörstellensysteme mithilfe der numerischen Renormierungsgruppe (NRG) behandelt. Die betrachteten Modelle unterscheiden sich dabei vor allem durch die Anzahl der berücksichtigten Störstellen. Eine Kombin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a27706838c05162b59bfeedcfe27cf39
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