Coexistence of Superconductivity and Charge Density Waves in Tantalum Disulfide: Experiment and Theory

Kvashnin, Yaroslav; VanGennep, Derrick; Mito, Masaki; Medvedev, S. A.; Thiyagarajan, R.; Karis, Olof; Vasiliev, A. N.; Eriksson, Olle; Abdel-Hafiez, M.

doi:10.1103/physrevlett.125.186401

Cited by 39 publications

(14 citation statements)

References 42 publications

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“…Group V-b TMDs tend to exhibit competition/interplay between the charge density wave (CDW) phases and superconducting phases [346,347] . In both NbSe2 and TaS2, it is found that applying compressive pressure favors the formation of the superconducting phase [348,349] . Understanding the interplay between these two phases in these materials may elucidate the unconventional superconductivity in these systems.…”

Section: D Superconductorsmentioning

confidence: 99%

Nanomaterials for Quantum Information Science and Engineering

et al. 2022

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Quantum information science and engineering (QISE) which entails generation, control and manipulation of individual quantum mechanical states together with nanotechnology have dominated condensed matter physics and materials science research in the 21st century. Solid state devices for QISE have, to this point, predominantly been designed with bulk material as their constituents. In this review, we consider how nanomaterials or low-dimensional materials i.e. materials with intrinsic quantum confinement -may offer inherent advantages over conventional materials for QISE. We identify the materials challenges for specific types of qubits, and we identify how emerging nanomaterials may overcome these challenges. Challenges for and progress towards nanomaterials-based quantum devices are identified. We aim to help close the gap between the nanotechnology and quantum information communities and inspire research that will lead to next-generation quantum devices for scalable and practical quantum applications.

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Section: D Superconductorsmentioning

confidence: 99%

Nanomaterials for Quantum Information Science and Engineering

et al. 2022

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“…Charge-density waves (CDWs) transition, usually coexisting with Cooper pair condensation in TMDs, was previously reported to have been associated with structural distortions of the lattice sites 5 – 8 . For instance, CDW effect was found to promote superconductivity in 1T-TaS structure 9 , 10 . Following this, pressure significantly affects superconductivity in this very structure as well: a pressure range of 3-25 GPa gives rise to a superconducting transition temperature (T ) of 5 K. Moreover, there are also studies that give more detailed discussions on the layered structures of TMDs at both ambient and high pressure, for example, WTe was confirmed to superconduct 11 and clearly shown that the van der Waals (vdW) forces play an important role 12 .…”

Section: Introductionmentioning

confidence: 99%

Effect of substitution on the superconducting phase of transition metal dichalcogenide Nb(Se$$_{x}$$S$$_{1-x}$$)$$_{2}$$ van der Waals layered structure

Tsuppayakorn‐aek

Pluengphon

Phansuke

et al. 2021

Sci Rep

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By means of first-principles cluster expansion, anisotropic superconductivity in the transition metal dichalcogenide Nb(Se$$_{x}$$ x S$$_{1-x}$$ 1 - x )$$_{2}$$ 2 forming a van der Waals (vdW) layered structure is observed theoretically. We show that the Nb(Se$$_{0.5}$$ 0.5 S$$_{0.5}$$ 0.5 )$$_{2}$$ 2 vdW-layered structure exhibits minimum ground-state energy. The Pnnm structure is more thermodynamically stable when compared to the 2H–NbSe$$_{2}$$ 2 and 2H–NbS$$_{2}$$ 2 structures. The characteristics of its phonon dispersions confirm its dynamical stability. According to electronic properties, i.e., electronic band structure, density of states, and Fermi surface indicate metallicity of Nb(Se$$_{0.5}$$ 0.5 S$$_{0.5}$$ 0.5 )$$_{2}$$ 2 . The corresponding superconductivity is then investigated through the Eliashberg spectral function, which gives rise to a superconducting transition temperature of 14.5 K. This proposes a remarkable improvement of superconductivity in this transition metal dichalcogenide.

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“…Over the last few years, two-dimensional (2D) van der Waals materials have spurred enormous interest due to their unique magnetic properties and potential to develop multi-functional electronics and spintronics devices [1][2][3][4][5]. Among various 2D systems, the family of CrX 3 (X = Cl, Br, and I) has recently been at the center of widespread research in developing high-quality samples, from monolayer to bulk single crystals.…”

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confidence: 99%

Intra-Atomic and Local Exchange Fields in the Van der Waals Magnet CrI3

Ghosh¹,

Jonsson²,

Mukkattukavil³

et al. 2022

Preprint

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We report on a combined experimental and theoretical study on CrI3 single crystals by employing the polarization dependence of resonant inelastic X-ray scattering (RIXS). Our investigations reveal multiple Cr 3d orbital splitting (dd excitations) as well as magnetic dichroism (MD) in the RIXS spectra which is evidence of spin-flip in the dd excitation. Interestingly, the dd excitation energies are similar on both sides of the ferromagnetic transition temperature, TC ∼ 61 K, although MD in RIXS is predominant at 0.4 tesla magnetic field below TC . This demonstrates that the ferromagnetic superexchange interaction that is responsible for the intra-atomic exchange field, is vanishingly small compared to local exchange field that comes from exchange and correlation interaction among the interacting Cr 3d orbitals. The investigation presented here demonstrate that the electronic structure of bulk CrI3 is complex in the sense that dynamical electron correlations are significant. The recorded RIXS spectra reported here reveal clearly resolved Cr 3d intra-orbital dd excitations that represent transitions between electronic levels that are heavily influenced by multi-configuration effects. Our calculations employing the crystal field TTmultiplet theory taking into account the Cr 3d hybridization with the ligand valence states and the full multiplet structure due to intra-atomic and crystal field interactions in O h and D 3d symmetry, clearly reproduced the dichroic trend in experimental RIXS spectra.

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Coexistence of Superconductivity and Charge Density Waves in Tantalum Disulfide: Experiment and Theory

Cited by 39 publications

References 42 publications

Nanomaterials for Quantum Information Science and Engineering

Nanomaterials for Quantum Information Science and Engineering

Effect of substitution on the superconducting phase of transition metal dichalcogenide Nb(Se$$_{x}$$S$$_{1-x}$$)$$_{2}$$ van der Waals layered structure

Intra-Atomic and Local Exchange Fields in the Van der Waals Magnet CrI3

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