We study the evolution of a Mott-Hubbard insulator into correlated metal upon doping in two-dimensional Hubbard model using cellular dynamical mean-field theory. Short-range spin correlations create two additional bands apart from familiar spectral function. Even tiny this causes jump Fermi energy to one these and an immediate momentum-dependent suppression weight at energy. The pseudogap is closely tied existence bands. This suggests strong-coupling mechanism that arises short-range large...

The evolution from an anomalous metallic phase to a Mott insulator within the two-dimensional Hubbard model is investigated by means of cellular dynamical mean-field theory. We show that approaching density-driven metal-insulator transition Fermi surface strongly renormalized and quasiparticle description breaks down in very anisotropic fashion. Regions where quasiparticles are scattered (hot spots) regions scattering rate relatively weak (cold spot) form irrespective whether parent has...

Proximity to a Mott insulating phase is likely be an important physical ingredient of theory that aims describe high-temperature superconductivity in the cuprates. Quantum cluster methods are well suited phase. Hence, as step towards quantitative competition between antiferromagnetism (AFM) and d-wave (SC) cuprates, we use Cellular Dynamical Mean Field Theory compute zero temperature properties two-dimensional square lattice Hubbard model. The order parameter found scale like superexchange...

We investigate Weyl semimetals with tilted conical bands in a magnetic field. Even when the cones are overtilted (type-II semimetal), Landau-level quantization can be possible as long field is oriented close to tilt direction. Most saliently, described within relativistic framework of Lorentz transformations that give rise rich spectrum, displaying new transitions beyond usual dipolar ones optical conductivity. identify particular features latter allow one distinguish between different types.

The interplay between the structural and magnetic phase transitions occurring in Fe-based pnictide superconductors is studied within a Ginzburg-Landau approach. We show that magnetoelastic coupling corresponding order parameters behind salient features observed diagram of these systems. This naturally explains coincidence transition temperatures some cases as well character (first or second-order) transitions. also key ingredient determining collinearity ordering, we propose an experimental...

We consider a minimal model to investigate the metal-insulator transition in VO$_2$. adopt Hubbard with two orbital per unit cell, which captures competition between Mott and singlet-dimer localization. solve within Dynamical Mean Field Theory, characterizing detail finding new features electronic states. compare our results available experimental data obtaining good agreement relevant parameter range. Crucially, we can account for puzzling optical conductivity obtained hysteresis region,...

We report a fine tuned doping study of strongly overdoped Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} single crystals using electronic Raman scattering. Combined with theoretical calculations, we show that the doping, at which normal-state pseudogap closes, coincides Lifshitz quantum phase transition where active holelike Fermi surface becomes electronlike. This conclusion suggests microscopic cause is sensitive to topology. Furthermore, find superconducting temperature unaffected by this transition,...

The dynamics of a microscopic cuprate model, namely, the two-dimensional Hubbard is studied with cluster extension dynamical mean-field theory. We find nontrivial structure frequency-dependent self-energies, which describes an unprecedented interplay between pseudogap and superconductivity. show that these properties are well described by quasiparticles hybridizing (hidden) fermionic excitations, emergent from strong electronic correlations. hidden fermion enhances superconductivity via...

We reveal the full energy-momentum structure of pseudogap underdoped high-Tc cuprate superconductors. Our combined theoretical and experimental analysis explains spectral-weight suppression observed in B2g Raman response at finite energies terms a appearing single-electron excitation spectra above Fermi level nodal direction momentum space. This result suggests an s-wave (which never closes space), distinct from d-wave superconducting gap. Recent tunneling photoemission experiments on...

We examine the cluster-size dependence of cellular dynamical mean-field theory (CDMFT) applied to two-dimensional Hubbard model. Employing continuous-time quantum Monte Carlo method as solver for effective cluster model, we obtain CDMFT solutions 4-, 8-, 12-, and 16-site clusters at a low temperature. Comparing various periodization schemes, which are used construct infinite-lattice quantities from results, find that cumulant yields fastest convergence hole-doped Mott insulator where most...

The one-dimensional Hubbard model is investigated by means of two different cluster schemes suited to introduce short-range spatial correlations beyond the single-site dynamical mean-field theory, namely, cellular which does not impose lattice symmetries, and its periodized version in translational symmetry recovered. It shown that both are able describe with extreme accuracy evolution density as a function chemical potential from Mott insulator metallic state. Using exact diagonalization...

We study the superconducting state of hole-doped two-dimensional Hubbard model using cellular dynamical mean-field theory, with Lanczos method as impurity solver. In underdoped regime, we find a natural decomposition one-particle (photoemission) energy gap into two components. The in nodal regions, stemming from anomalous self-energy, decreases decreasing doping. antinodal has an additional contribution normal component inherited normal-state pseudogap, and it increases Mott insulating phase...

We describe the $T=0$ quantum phase transition in heavy-fermion systems as an orbital-selective Mott (OSMT) using a cluster extension of dynamical mean-field theory. This is characterized by emergence new intermediate energy scale corresponding to opening pseudogap and vanishing low-energy hybridization between light heavy electrons. identify fingerprint physics electron with appearance surfaces momentum space where self-energy diverges we derive experimental consequences this scenario for...

Very large anisotropies in transport quantities have been observed the presence of very small in-plane structural anisotropy many strongly correlated electron materials. By studying two-dimensional Hubbard model with dynamical-mean-field theory for clusters, we show that such can be induced without static stripe order if interaction is enough to yield a Mott transition. Anisotropy decreases at frequency. The maximum effect on conductivity occurs underdoped regime, as high-temperature superconductors.

We consider finite-sized interfaces of a Weyl semimetal and show that the corresponding confinement potential is similar to application magnetic field. Among numerous states, which can be labeled by indices $n$ like in Landau levels, $n=0$ surface state describes Fermi arc at given chemical potential. Moreover, analogy with field shows an external in-plane used distort would explain some features magnetotransport semimetals. derive for type-I type-II semimetals where we deal tilt anisotropy...

We study the unconventional superconducting correlations caused by a single isolated magnetic impurity in conventional s-wave superconductor. Because of local breaking time-reversal symmetry, induces superconductivity, which is even both space and spin variables but odd under time inversion. derive an exact proportionality relation between even-frequency component electron density states imaginary part odd-frequency pairing function. By applying this to scanning tunneling microscopy spectra...

In this paper we investigate the zero-temperature doping-driven evolution of a superconductor toward Mott insulator in two-dimensional electron model, relevant for high-temperature superconductivity. To purpose use cluster extension dynamical mean-field theory. Our results show that standard $d$-wave superconductor, realized at high doping, is driven into via an intermediate superconducting state displaying unconventional physical properties. By restoring translational invariance lattice,...

Combining electronic Raman scattering experiments with cellular dynamical mean field theory, we present evidence of the pseudogap in superconducting state various hole-doped cuprates. In ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$ track hallmark, a peak-dip feature, as function temperature $T$ and doping $p$, well beyond optimal one. We show that, at all temperatures under dome, disappears ${p}_{c}$, between 0.222 0.226, where also normal-state...

We consider the dimer Hubbard model within dynamical mean-field theory to study interplay and competition between Mott Peierls physics. describe various metal-insulator transition lines of phase diagram breakdown different solutions that occur along them. focus on specific issue debated Mott-Peierls insulator crossover systematic evolution electronic structure across diagram. found at low intradimer hopping, emerging local magnetic moments can unbind above a characteristic singlet...

We study the relationship between pseudogap and Fermi-surface topology in two-dimensional Hubbard model by means of cellular dynamical mean-field theory. find two possible metallic solutions on a broad range interactions, doping, frustration: conventional renormalized metal an unconventional metal. At half filling, is more stable displays interaction-driven Mott metal-insulator transition. However, for large interactions small region that relevant cuprates, phase becomes ground state. By...

We develop a cluster dynamical mean field theory of the periodic Anderson model in three dimensions, taking two sites as basic reference frame. The displays features Doniach phase diagram: paramagnetic Fermi liquid state, an antiferromagnetic state and transition between them. In contrast with spin density wave theories, is accompanied by large increase effective mass everywhere on surface substantial change shape across transition. To understand nature origin phases near transition, we...

We study the frequency-dependent structure of electronic self-energy in pseudogap and superconducting states two-dimensional Hubbard model. present calculated with cellular dynamical mean-field theory systematically space temperature, electron density, interaction strength. show that low-frequency part is well represented by a simple equation, which describes transitions an to from hidden-fermionic state. By fitting numerical data this we determine parameters characterizing hidden fermion...

Majorana fermions are promising building blocks of forthcoming technology in quantum computing. However, their nonambiguous identification has remained a difficult issue because the concomitant competition with other topologically trivial fermionic states, which poison detection most spectroscopic probes. By employing numerical and analytical methods, here we show that Fano factor tomography is key distinctive feature bound state, displaying spatially constant Poissonian value equal to one....