Landscape of coexisting excitonic states in the insulating single-layer cuprates and nickelates

Zhu, Jian‐Xin

doi:10.1103/physrevb.101.155135

Cited by 18 publications

(14 citation statements)

References 78 publications

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“…Similarly promising chiral-triplet superconductivity is predicted in heavyfermion dichalcogenide UTe 2 [40]. Possible topological superconductivity is predicted theoretically in other 2D transition metal dichalcogenides, as well as other correlated 2D materials [41].…”

Section: Experimentally Feasible Systemssupporting

confidence: 53%

Inducing chiral superconductivity on honeycomb lattice systems

Alsharari,

Ulloa

2021

Preprint

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Superconductivity in graphene-based systems has recently attracted much attention, as either intrinsic behavior or induced by proximity to a superconductor may lead to interesting topological phases and symmetries of the pairing function. A prominent system considers the pairing to have chiral symmetry. The question arises as to the effect of possible spin-orbit coupling on the resulting superconducting quasiparticle spectrum. Utilizing a Bogolyubov-de Gennes (BdG) Hamiltonian, we explore the interplay of different interaction terms in the system, and their role in generating complex Berry curvatures in the quasiparticle spectrum, as well as non-trivial topological behavior. We demonstrate that the topology of the BdG Hamiltonian in these systems may result in the appearance of edge states along the zigzag edges of nanoribbons in the appropriate regime.

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Section: Experimentally Feasible Systemssupporting

confidence: 53%

Inducing chiral superconductivity on honeycomb lattice systems

Alsharari,

Ulloa

2021

Preprint

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“…[4] and references therein for the phenomenology with hole doping). However to our surprise, while there are standard-DFT [13,61], DFT+U [62] and meta generalizedgradient approximation [63] studies, we could not find an in-depth realistic-DMFT investigation for this material in the literature. This section is hence also devoted to fill this void.…”

Section: La 2 Niomentioning

confidence: 61%

Assessing the correlated electronic structure of lanthanum nickelates

Lechermann

2021

Preprint

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The series of nickel-oxide compounds LaNiO 3 (formal Ni(d 7 )), La 2 NiO 4 (formal Ni(d 8 )) and LaNiO 2 (formal Ni(d 9 )) is investigated by firstprinciples many-body, using a combination of density functional theory, selfinteraction correction and dynamical mean-field theory. The characteristics of these different nickelates, in good agreement with available experimental data, is revealed by employing a compound-independent choice for the local Coulomb interactions. The dichotomy within the low-energy dominant Ni-eg sector of {d z 2 , d x 2 −y 2 } kind is rising with growing Ni(3d) filling across the series. An intermediate-coupling scheme for spin-polarized calculations is introduced, which leads to very weak Ni ordered moments for the infinite-layer compound LaNiO 2 in contrast to the robust-moment system La 2 NiO 4 .

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“…In the last decades the 4d and 5d TMO perovskites have gained increasing interest due to the discovery of novel electronic and magnetic quantum states of matter arising from the coupling between spin-orbit interaction and other active degrees of freedom [9][10][11][12]. Up to now, few theoretical studies have investigated the role of excitonic effects on the optical spectra of TMO perovskites [13][14][15][16][17]. These works have proved that the random phase approximation (RPA) is able to reproduce the experimental data only to a limited extent and that the inclusion of electron-hole (e-h) interaction is often pivotal to achieve a satisfying account of the optical transitions [14][15][16].…”

Section: Introductionmentioning

confidence: 99%