A possible family of Ni-based high temperature superconductors

Le, Congcong; Zeng, Jinfeng; Gu, Yuhao; Cao, Guanghan; Hu, Jiangping

doi:10.1016/j.scib.2018.06.005

Cited by 16 publications

(17 citation statements)

References 43 publications

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“…Our calculation based on the random phase approximation (RPA) confirms that, for the realistic interaction parameters, the undoped compound hosts an collinear AFM state as predicted in Ref. [5]. In particular, we find that the AFM state is induced by the perfect Fermi surface (FS) nesting.…”

Section: Introductionsupporting

confidence: 86%

“…In Ref. [5], a new candidate configuration with d 8 filling hosted by the Ni 2+ -based compounds is proposed. Particularly, as the prototype of this Ni 2+ -based family, the layered compounds La 2 Ni 2 M 2 O 3 (M=S, Se, Te) are analyzed in details.…”

Section: Introductionmentioning

confidence: 99%

“…We adopt the four-orbital tight-band (TB) model proposed in Ref. [5] to describe the band structure of single layer Ni 2 Se 2 O in La 2 Ni 2 Se 2 O 3 , and the Hubbard-Hund model to further * zhangld@bit.edu.cn describe the interactions in the system. Our calculation based on the random phase approximation (RPA) confirms that, for the realistic interaction parameters, the undoped compound hosts an collinear AFM state as predicted in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Doping-type-dependent pairing symmetry in predicted Ni-based high-$T_c$ superconductor La$_2$Ni$_2$Se$_2$O$_3$

Zhang

2019

Preprint

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We study the electronic instabilities of newly predicted Ni-based high-Tc superconducting material La2Ni2Se2O3 based on the random phase approximation. Our calculations on the susceptibility indicate that the collinear antiferromagnetic state in the parental compound is induced by the perfect Fermi surface nesting. Our further calculations reveal that the ground states of the doped compound are the s±-and dxy-wave superconducting states driven by the antiferromagnetic spin fluctuations enhanced by the quasi-nestings. Interestingly, the s-and d-wave pairings occur in the hole and electron doping cases, respectively. This doping-type dependence of the pairing symmetry can be understood from the doping dependence of the nested Fermi pockets.The active ingredient of the layered superconductor La 2 Ni 2 Se 2 O 3 is the [Ni 2 Se 2 O] 2− layer, which has the lattice structure shown in Fig. 1(a). The two e g orbitals of Ni cations determine the low energy physics of the system. In the basis of the four e g orbitals at two different

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Section: Introductionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Doping-type-dependent pairing symmetry in predicted Ni-based high-$T_c$ superconductor La$_2$Ni$_2$Se$_2$O$_3$

Zhang

2019

Preprint

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“…The single CuO 2 layer grown by MBE also has a similar electronic structure [38]. In La 2 Ni 2 Se 2 O 3 , a recent theoretically proposed candidate of Ni-based high temperature superconductors [39], the low energy physics is also attributed to the two e g orbitals of Ni atoms. If the superconductivity is determined to arise in the two orbital model, the Ni-based TMTs, together with these materials, can provide us much needed information to solve the elusive mechanism of high temperature superconductivity.…”

Section: Discussionmentioning

confidence: 93%

Ni-based transition metal trichalcogenide monolayer: A strongly correlated quadruple-layer graphene

Zhang

et al. 2019

Phys. Rev. B

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We investigate the electronic physics of layered Ni-based trichalcogenide NiPX3 (X=S, Se), a member of transition-metal trichalcogenides (TMTs) with the chemical formula, ABX3. These Ni-based TMTs distinguish themselves from other TMTs as their low energy electronic physics can be effectively described by the two eg d-orbitals. The major band kinematics is characterized by the unusal long-range effective hopping between two third nearest-neighbor (TNN) Ni sites in the two-dimensional Ni honeycomb lattice so that the Ni lattice can be equivalently viewed as four weakly coupled honeycomb sublattices. Within each sublattice, the electronic physics is described by a strongly correlated two-orbital graphene-type model that results in an antiferromagnetic (AFM) ground state near half filling. We show that the low energy physics in a paramagnetic state is determined by the eight Dirac cones which locate at K, K , K 2 and K 2 points in the first Brillouin zone with a strong AFM fluctuation between two K(K ) and K 2 ( K 2 ) Dirac cones and carrier doping can sufficiently suppress the long-range AFM order and allow other competing orders, such as superconductivity, to emerge. The material can be an ideal system to study many exotic phenomena emerged from strong electron-electron correlation, including a potential d ± id superconducting state at high temperature.arXiv:1811.02333v1 [cond-mat.str-el]

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“…The discoveries of superconductivity (SC) in the complex copper oxide [1] and the iron-based pnictide [2] stimulate enthusiasm to search for SC especially in late 3d-transition-metal (Fe, Co, Ni, and Cu) compounds [3][4][5][6][7]. Among them, the Co-based superconductors are very limited so far.…”

Section: Introductionmentioning

confidence: 99%

Bulk superconductivity and Pauli paramagnetism in nearly stoichiometric CuCo$_2$S$_4$

Jin,

Sun,

Cui

et al. 2021

Preprint

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It has long remained elusive whether CuCo2S4 thiospinel shows bulk superconductivity. Here we clarify the issue by studying on the samples of sulfur-deficient CuCo2S3.7 and sulfurized CuCo2S4. The sample CuCo2S3.7 has a smaller lattice constant of a = 9.454 Å, and it is not superconducting down to 1.8 K. After a full sulfurization, the a axis of the thiospinel phase increases to 9.475 Å, and the thiospinel becomes nearly stoichiometric CuCo2S4, although a secondary phase of slightly Cu-doped CoS2 forms. Bulk superconductivity at 4.2 K and Pauli paramagnetism have been demonstrated for the sulfurized CuCo2S4 by the measurements of electrical resistivity, magnetic susceptibility, and specific heat.

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A possible family of Ni-based high temperature superconductors

Cited by 16 publications

References 43 publications

Doping-type-dependent pairing symmetry in predicted Ni-based high-$T_c$ superconductor La$_2$Ni$_2$Se$_2$O$_3$

Doping-type-dependent pairing symmetry in predicted Ni-based high-$T_c$ superconductor La$_2$Ni$_2$Se$_2$O$_3$

Ni-based transition metal trichalcogenide monolayer: A strongly correlated quadruple-layer graphene

Bulk superconductivity and Pauli paramagnetism in nearly stoichiometric CuCo$_2$S$_4$

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