169 citations · 1.8k across the 62 of their papers we have counts for
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Anisotropic bond-current susceptibilities and real-space current topology in correlated electron systems
Worapon Phatcharasirinawakun, Hiroyuki Yamase
We derive all symmetry-allowed bond-current form factors generated by nearest-neighbor bond-charge interactions on square, triangular, and kagome lattices. We find that the anisotr…
Quantum criticality and non-Fermi liquids: the Wilsonian renormalization group perspective
Mateusz Homenda, Pawel Jakubczyk, Hiroyuki Yamase
We develop a theoretical framework based on the nonperturvative renormalization group (RG) in the one-particle irreducible (Wetterich) formulation to tackle the interplay of couple…
Generalized Hertz action and quantum criticality of two-dimensional Fermi systems
Mateusz Homenda, Paweł Jakubczyk, Hiroyuki Yamase
We reassess the structure of the effective action and quantum critical singularities of two-dimensional Fermi systems characterized by the ordering wavevector . B…
Retaining Landau quasiparticles in the presence of realistic charge fluctuations in cuprates
Hiroyuki Yamase, Matias Bejas, Andres Greco
Charge excitation spectra are getting clear in cuprate superconductors in momentum-energy space especially around a small momentum region, where plasmon excitations become dominant…
Spin and bond-charge excitation spectra in correlated electron systems near antiferromagnetic phase
Muhammad Zafur, Hiroyuki Yamase
Magnetic and bond-charge interactions can arise from the same microscopic interaction. Motivated by this observation, we compute magnetic and bond-charge excitation spectra on an e…
Gapped collective charge excitations and interlayer hopping in cuprate superconductors
M. Hepting, M. Bejas, A. Nag +17
We use resonant inelastic x-ray scattering (RIXS) to probe the propagation of plasmons in the electron-doped cuprate superconductor SrLaCuO (SLCO). We detect a…
Ferromagnetic and metamagnetic transitions in itinerant electron systems: a microscopic study
Hiroyuki Yamase
We perform a microscopic study of itinerant ferromagnetic systems. We reveal a very rich phase diagram in the three-dimensional space spanned by the chemical potential, a magnetic…
Electron self-energy from quantum charge fluctuations in the layered t-J model with long-range Coulomb interaction
Hiroyuki Yamase, Matías Bejas, Andrés Greco
Employing a large-N scheme of the layered t-J model with the long-range Coulomb interaction, which captures fine details of the charge excitation spectra recently observed in cupra…
Detection of Acoustic Plasmons in Hole-Doped Lanthanum and Bismuth Cuprate Superconductors Using Resonant Inelastic X-Ray Scattering
Abhishek Nag, M. Zhu, Matias Bejas +11
High Tc superconductors show a rich variety of phases associated with their charge degrees of freedom. Valence charges can give rise to charge ordering or acoustic plasmons in thes…
Static spin susceptibility in magnetically ordered states
Kazuhiro Kuboki, Hiroyuki Yamase
We report that special care is needed when longitudinal magnetic susceptibility is computed in a magnetically ordered phase, especially in metals. We demonstrate this by studying s…
Charge-Density-Excitation Spectrum in the t-t'-J-V Model
Andres Greco, Hiroyuki Yamase, Matias Bejas
We study the density-density correlation function in a large-N scheme of the t-t'-J-V model. When the nearest-neighbor Coulomb interaction V is zero, our model exhibits phase separ…
Fermi surface reconstruction and drop of Hall number due to spiral antiferromagnetism in high- cuprates
Andreas Eberlein, Walter Metzner, Subir Sachdev +1
We show that a Fermi surface reconstruction due to spiral antiferromagnetic order may explain the rapid change in the Hall number as recently observed near optimal doping in cuprat…
Plasmon excitations in layered high-Tc cuprates
Andres Greco, Hiroyuki Yamase, Matias Bejas
Motivated by the recent resonant inelastic x-ray scattering (RIXS) experiment for the electron-doped cuprates Nd_{2-x}Ce_{x}CuO_{4} with x around 0.15, we compute the density-densi…
Coexistence of incommensurate magnetism and superconductivity in the two-dimensional Hubbard model
Hiroyuki Yamase, Andreas Eberlein, Walter Metzner
We analyze the competition of magnetism and superconductivity in the two-dimensional Hubbard model with a moderate interaction strength, including the possibility of incommensurate…
-wave bond-order charge excitations in electron-doped cuprates
Hiroyuki Yamase, Matías Bejas, Andrés Greco
We study charge excitation spectra in the two-dimensional - model on a square lattice to explore a charge-order tendency recently found in electron-doped cuprates around the…
Spin nematic fluctuations near a spin-density-wave phase
Hiroyuki Yamase, Roland Zeyher
We study an interacting electronic system exhibiting a spin nematic instability. Using a phenomenological form for the spin fluctuation spectrum near the spin-density-wave (SDW) ph…
Electronic nematic phase transition in the presence of anisotropy
Hiroyuki Yamase
We study the phase diagram of electronic nematic instability in the presence of xy anisotropy. While a second order transition cannot occur in this case, mean-field theory predicts…
Electronic Raman scattering from orbital nematic fluctuations
Hiroyuki Yamase, Roland Zeyher
We compute Raman scattering intensities via the lowest-order coupling to the bosonic propagator associated with orbital nematic fluctuations in a minimal model for iron pnictides.…
Mean-field theory on a coupled system of ferromagnetism and electronic nematic order
Hiroyuki Yamase
We analyze an effective model on a square lattice with two types of forward scattering interactions, which, respectively, drive ferromagnetism (FM) and electronic nematic order via…
Possible charge instabilities in two-dimensional doped Mott insulators
Matias Bejas, Andres Greco, Hiroyuki Yamase
Motivated by the growing evidence of the importance of charge fluctuations in the pseudogap phase in high-temperature cuprate superconductors, we apply a large-N expansion formulat…
Fermi surface truncation from thermal nematic fluctuations
Hiroyuki Yamase, Walter Metzner
We analyze how thermal fluctuations near a finite temperature nematic phase transition affect the spectral function for single-electron excitations in a two-dimensio…
Ferromagnetic instability and finite-temperature properties of two-dimensional electron systems with van Hove singularities
A. A. Katanin, H. Yamase, V. Yu. Irkhin
We study a ferromagnetic tendency in the two-dimensional Hubbard model near van Hove filling by using a functional renormalization-group method. We compute temperature dependences…
Nematic Quantum Criticality Without Order
Hiroyuki Yamase, Pawel Jakubczyk, Walter Metzner
We consider a two-dimensional interacting Fermi system which displays a nematic phase within mean-field theory. The system is analyzed using a non-perturbative renormalization-grou…
Raman scattering near a d-wave Pomeranchuk instability
Hiroyuki Yamase, Roland Zeyher
Motivated by recent transport and neutron scattering experiments suggesting an orientational symmetry breaking in underdoped cuprates we present a theoretical study of Raman scatte…