86 citations · 586 across the 33 of their papers we have counts for
19 papers · 1 filter
Spin-Valley Anderson Impurity for Moiré Systems: Fermi Liquid, Pairing, and Pseudogap
Yi-Jie Wang, Geng-Dong Zhou, Hyunsung Jung +3
Recent experiments support that the magic-angle graphene can be modeled by a periodic array of correlated quantum impurities, immersed in a Dirac sea. This work analytically tackle…
The finite-difference parquet method: Enhanced electron-paramagnon scattering opens a pseudogap
Jae-Mo Lihm, Dominik Kiese, Seung-Sup B. Lee +1
We present the finite-difference parquet method that greatly improves the applicability and accuracy of two-particle correlation approaches to interacting electron systems. This me…
Dynamical scaling and Planckian dissipation due to heavy-fermion quantum criticality
Andreas Gleis, Seung-Sup B. Lee, Gabriel Kotliar +1
We study dynamical scaling associated with a Kondo-breakdown quantum critical point (KB-QCP) of the periodic Anderson model, treated by two-site cellular dynamical mean-field theor…
Overcomplete intermediate representation of two-particle Green's functions and its relation to partial spectral functions
Selina Dirnböck, Seung-Sup B. Lee, Fabian B. Kugler +4
Two-particle response functions are a centerpiece of both experimental and theoretical quantum many-body physics. Yet, due to their size and discontinuity structure, they are chall…
Analytic continuation of multipoint correlation functions
Anxiang Ge, Johannes Halbinger, Seung-Sup B. Lee +2
Conceptually, the Matsubara formalism (MF), using imaginary frequencies, and the Keldysh formalism (KF), formulated in real frequencies, give equivalent results for systems in ther…
Emergent Properties of the Periodic Anderson Model: a High-Resolution, Real-Frequency Study of Heavy-Fermion Quantum Criticality
Andreas Gleis, Seung-Sup B. Lee, Gabriel Kotliar +1
We study paramagnetic quantum criticality in the periodic Anderson model (PAM) using cellular dynamical mean-field theory, with the numerical renormalization group (NRG) as an impu…
Symmetric improved estimators for multipoint vertex functions
Jae-Mo Lihm, Johannes Halbinger, Jeongmin Shim +3
Multipoint vertex functions, and the four-point vertex in particular, are crucial ingredients in many-body theory. Recent years have seen significant algorithmic progress toward nu…
Tuning orbital-selective phase transitions in a two-dimensional Hund's correlated system
Eun Kyo Ko, Sungsoo Hahn, Changhee Sohn +12
Hund's rule coupling () has attracted much attention recently for its role in the description of the novel quantum phases of multi orbital materials. Depending on the o…
Reply to: "Extracting Kondo temperature of strongly-correlated systems from the inverse local magnetic susceptibility"
Xiaoyu Deng, Katharina M. Stadler, Kristjan Haule +4
This is a reply to A. A. Katanin's comment [A. A. Katanin, Nat. Commun. 12, 1433 (2021); arXiv:2103.02966] on our paper [X. Deng et al., Nat. Commun. 10, 2721 (2019); arXiv:1708.05…
Computing local multipoint correlators using the numerical renormalization group
Seung-Sup B. Lee, Fabian B. Kugler, Jan von Delft
Local three- and four-point correlators yield important insight into strongly correlated systems and have many applications. However, the nonperturbative, accurate computation of m…
Global phase diagram of a spin-orbital Kondo impurity model and the suppression of Fermi-liquid scale
Y. Wang, E. Walter, S. -S. B. Lee +4
Many correlated metallic materials are described by Landau Fermi-liquid theory at low energies, but for Hund metals the Fermi-liquid coherence scale is found to be…
Strongly correlated materials from a numerical renormalization group perspective: How the Fermi-liquid state of SrRuO emerges
Fabian B. Kugler, Manuel Zingl, Hugo U. R. Strand +3
The crossover from fluctuating atomic constituents to a collective state as one lowers temperature or energy is at the heart of the dynamical mean-field theory description of the s…
Mott quantum criticality in the one-band Hubbard model: Dynamical mean-field theory, power-law spectra, and scaling
Heike Eisenlohr, Seung-Sup B. Lee, Matthias Vojta
Recent studies of electrical transport, both theoretical and experimental, near the bandwidth-tuned Mott metal-insulator transition have uncovered apparent quantum critical scaling…
Orbital differentiation in Hund metals
Fabian B. Kugler, Seung-Sup B. Lee, Andreas Weichselbaum +2
Orbital differentiation is a common theme in multiorbital systems, yet a complete understanding of it is still missing. Here, we consider a minimal model for orbital differentiatio…
Filling-driven Mott transition in SU(N) Hubbard models
Seung-Sup B. Lee, Jan von Delft, Andreas Weichselbaum
We study the filling-driven Mott transition involving the metallic and paramagnetic insulating phases in SU(N) Fermi-Hubbard models, using dynamical mean-field theory (DMFT) and th…
Generalized Schrieffer-Wolff transformation of multi-flavor Hubbard models
Seung-Sup B. Lee, Jan von Delft, Andreas Weichselbaum
We give a self-contained derivation of the low-energy effective interactions of the SU() Hubbard model, a multiflavor generalization of the one-band Hubbard model, by using a ge…
Doublon-holon origin of the subpeaks at the Hubbard band edges
Seung-Sup B. Lee, Jan von Delft, Andreas Weichselbaum
Dynamical mean-field theory (DMFT) studies frequently observe a fine structure in the local spectral function of the SU(2) Fermi-Hubbard model at half filling: In the metallic phas…
Open Wilson chains for quantum impurity models: Keeping track of all bath modes
Benedikt Bruognolo, Nils-Oliver Linden, Frauke Schwarz +6
When constructing a Wilson chain to represent a quantum impurity model, the effects of truncated bath modes are neglected. We show that their influence can be kept track of systema…
Anisotropic charge Kondo effect in a triple quantum dot
Gwangsu Yoo, Jinhong Park, S. -S. B. Lee +1
We predict that an anisotropic charge Kondo effect appears in a triple quantum dot, when the system has two-fold degenerate ground states of (1,1,0) and (0,0,1) charge configuratio…