Performance Potential of 2D Kagome Lattice Interconnects

Wu, Tong

doi:10.1109/led.2019.2947285

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…Indeed, PDW has been observed in another conventional superconductor NbSe 2 , where the pair-density modulation is due to the real space charge density modulations 36 . We also note that the EPCdriven superconductivity can coexist with the time-reversal symmetrybreaking (TRSB) orders or fluctuations 18,37,38 , as proposed by theoretical studies [39][40][41] . In those cases, the superconducting order parameter is expected to intertwine with the TRSB order parameter, which gives rise to an unconventional ground state.…”

mentioning

confidence: 65%

Testing electron–phonon coupling for the superconductivity in kagome metal CsV3Sb5

Zhong

Liu

et al. 2023

Nat Commun

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In crystalline materials, electron-phonon coupling (EPC) is a ubiquitous many-body interaction that drives conventional Bardeen-Cooper-Schrieffer superconductivity. Recently, in a new kagome metal CsV3Sb5, superconductivity that possibly intertwines with time-reversal and spatial symmetry-breaking orders is observed. Density functional theory calculations predicted weak EPC strength, λ, supporting an unconventional pairing mechanism in CsV3Sb5. However, experimental determination of λ is still missing, hindering a microscopic understanding of the intertwined ground state of CsV3Sb5. Here, using 7-eV laser-based angle-resolved photoemission spectroscopy and Eliashberg function analysis, we determine an intermediate λ=0.45–0.6 at T = 6 K for both Sb 5p and V 3d electronic bands, which can support a conventional superconducting transition temperature on the same magnitude of experimental value in CsV3Sb5. Remarkably, the EPC on the V 3d-band enhances to λ~0.75 as the superconducting transition temperature elevated to 4.4 K in Cs(V0.93Nb0.07)3Sb5. Our results provide an important clue to understand the pairing mechanism in the kagome superconductor CsV3Sb5.

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confidence: 65%

Testing electron–phonon coupling for the superconductivity in kagome metal CsV3Sb5

Zhong

Liu

et al. 2023

Nat Commun

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“…In the first term, 〈i, j〉 means the hopping interaction with strength t h occurring between the nearest neighbors, and c † iα (c iα ) is the creation (annihilation) operator with spin α at site i. For most kagome materials, the hopping strength t h varied from 0.07 to 0.1 eV [29,44]. In this work, all the interaction parameters and related numerical results are in units of t h .…”

Section: Tight-binding Modelmentioning

confidence: 99%

“…Most kagome materials are composed of heavy atoms, which could lead to relatively large spin-orbit coupling. For example, in Fe 3 Sn, the hopping parameter is t h = 123 meV, and the SOC strength λ SO = 9.24 meV [44]. Here, the SOC strength is set to be λ SO = 0.1t h , which is employed in most tight-bind studies and can well fit the first-principles calculations [31,34].…”

Section: Tight-binding Modelmentioning

confidence: 99%

Spin-valley polarized edge states in quasi-one-dimensional asymmetric kagome lattice

Sun

Chen

et al. 2022

Front. Phys.

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The spin-valley-related electronic properties of quasi-one-dimensional kagome lattices with intrinsic spin-orbit coupling are studied, based on the tight-binding formalism. Three types of kagome-lattice nanoribbons along the x-direction with various geometric boundaries are proposed, including two symmetric nanoribbons and one asymmetric one. It is found that two nonequivalent Dirac cones and helical edge states exist in all the three types of kagome-lattice nanoribbons at 1/3 filling. Among them in the asymmetric nanoribbon, the spin and valley are found to be locked to each other due to inversion symmetry breaking, resulting in spin-valley polarized edge states. Band structure and probability density of wave function show that the spin-up/-down edge states locate at the K/K′ valley, with opposite propagation direction at the upper and lower boundaries. Spin-resolved real-space local current confirms the spin-valley polarized helical edge state in the asymmetric nanoribbon. The device application of the asymmetric kagome-lattice nanoribbon is worth further investigation.

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“…Theoretical studies on materials with Kagome lattices have qualified their relevance to these technologies and have further probed for numerous magnetic and electronic properties [19][20][21][22][23][24][25][26][27][28][29][30][31]. Experimental studies have offered a different perspective on many of the same properties [32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Effects of exchange distortions in the magnetic Kagome lattice

Coker,

Saxena,

Haraldsen

2020

Preprint

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This study examines the effect of distorted triangular magnetic interactions in the Kagome lattice. Using a Holstein-Primakoff expansion, we determine the analytical solutions for classical energies and the spin-wave modes for various magnetic configurations. By understanding the magnetic phase diagram, we characterize the changes in the spin waves and examine the spin distortions of the ferromagnetic (FM), Antiferrimagnetic (AfM), and 120 • phases that are produced by variable exchange interactions and lead to various non-collinear phases, which provides a deeper understanding of the magnetic fingerprints of these configurations for experimental characterization and identification.

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Performance Potential of 2D Kagome Lattice Interconnects

Cited by 7 publications

References 11 publications

Testing electron–phonon coupling for the superconductivity in kagome metal CsV3Sb5

Testing electron–phonon coupling for the superconductivity in kagome metal CsV3Sb5

Spin-valley polarized edge states in quasi-one-dimensional asymmetric kagome lattice

Effects of exchange distortions in the magnetic Kagome lattice

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