Doping dependence of electronic structure of infinite-layer 
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Liu, Zhao; Xu, Chenchao; Cao, Chao; Zhu, Wei; Wang, Z. F.; Yang, Jinlong

doi:10.1103/physrevb.103.045103

Cited by 33 publications

(21 citation statements)

References 59 publications

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“…Our calculations incorporate the Nd-derived bands which both act as a charge resevoir and hybridize with the d x 2 −y 2 band. While there have been many DMFT studies on NdNiO 2 [6,[10][11][12][13][14][15][16][17][18][19][21][22][23][24][25], these studies typically do not address superconductivity directly, with the exception of Ref. [11] which uses the Dynamical Vertex Approximation (DΓA) on top of single site DMFT to calculate the superconducting pairing susceptibility.…”

Section: Introductionmentioning

confidence: 99%

Superconductivity and Antiferromagnetism in NdNiO$_2$ and CaCuO$_2$: A Cluster DMFT Study

Karp,

Hampel,

Millis

2022

Preprint

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We perform a comparative 2 × 2 real space cluster DMFT study on minimal models for NdNiO2 and CaCuO2 obtained from downfolding DFT states, using a Nambu formalism that allows for both superconducting and antiferromagnetic order. We produce a phase diagram in temperature and doping. We find that for the nickelate, like the cuprate, the stoichiometric compound is antiferromagnetic. We find superconductivity in a doping range bounded, with a small coexistence region, by the onset of antiferromagnetism at low doping and with transition temperature becoming immeasurably small at high doping. Superconductivity emerges at around the same hole doping for both compounds, but requires a larger deviation from half filling for the nickelate. Both antiferromagnetic and superconducting order lead to a partial gapping of the d x 2 −y 2 Fermi surface sheet. Our similar results for the cuprate and nickelate suggest that nickelate superconductivity is cupratelike. We compare our results to the experimental phase diagram.

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Section: Introductionmentioning

confidence: 99%

Superconductivity and Antiferromagnetism in NdNiO$_2$ and CaCuO$_2$: A Cluster DMFT Study

Karp,

Hampel,

Millis

2022

Preprint

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“…This in turn brings up the issue of the nature of the doped holes on the Ni sites. That is, do states [40,[57][58][59][60]. DFT calculations point instead towards a cuprate-like low-spin (S 0) picture due to the large crystalfield splitting of the e g states in a square planar environment [53].…”

Section: From ∞mentioning

confidence: 99%

Low Valence Nickelates: Launching the Nickel Age of Superconductivity

et al. 2022

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The discovery of superconductivity in thin films (∼10 nm) of infinite-layer hole-doped NdNiO2 has invigorated the field of high temperature superconductivity research, reviving the debate over contrasting views that nickelates that are isostructural with cuprates are either 1) sisters of the high temperature superconductors, or 2) that differences between nickel and copper at equal band filling should be the focus of attention. Each viewpoint has its merits, and each has its limitations, suggesting that such a simple picture must be superseded by a more holistic comparison of the two classes. Several recent studies have begun this generalization, raising a number of questions without suggesting any consensus. In this paper, we organize the findings of the electronic structures of n-layered NiO2 materials (n = 1 to ∞) to outline (ir)regularities and to make comparisons with cuprates, with the hope that important directions of future research will emerge.

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“…On the other hand, the Ni 3d x 2 −y 2 states in the NiO 2 planes are quasi-2D and strongly correlated [64,74]. Nevertheless, the relevance of the rareearth 5d bands for the low-energy physics of IL nickelates is still under debate and proposals range from effective single-band to multi-orbital models, including various Ni 3d and rare-earth 5d as well as interstitial orbitals [62,63,[75][76][77][78][79][80][81][82][83][84][85][86][87][88][89]. Hence, future experiments probing the Fermi surface topology, such as angle resolved photoemission (ARPES) and quantum oscillation measurements, are highly desirable.…”

Section: Electronic Structurementioning

confidence: 99%

Soft X-Ray Spectroscopy of Low-Valence Nickelates

2021

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Low-valence nickelates—including infinite-layer (IL) and trilayer (TL) compounds—are longstanding candidates for mimicking the high-temperature superconductivity of cuprates. A recent breakthrough in the field came with the discovery of superconductivity in hole-doped IL nickelates. Yet, the degree of similarity between low-valence nickelates and cuprates is the subject of a profound debate for which soft x-ray spectroscopy experiments at the Ni L- and O K-edge provided critical input. In this review, we will discuss the essential elements of the electronic structure of low-valance nickelates revealed by x-ray absorption spectroscopy (XAS) and resonant inelastic x-ray scattering (RIXS). Furthermore, we will review magnetic excitations observed in the RIXS spectra of IL and TL nickelates, which exhibit characteristics that are partly reminiscent of those of cuprates.

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Doping dependence of electronic structure of infinite-layer NdNiO2

Cited by 33 publications

References 59 publications

Superconductivity and Antiferromagnetism in NdNiO$_2$ and CaCuO$_2$: A Cluster DMFT Study

Superconductivity and Antiferromagnetism in NdNiO$_2$ and CaCuO$_2$: A Cluster DMFT Study

Low Valence Nickelates: Launching the Nickel Age of Superconductivity

Soft X-Ray Spectroscopy of Low-Valence Nickelates

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