Nonreciprocal charge transport in topological kagome superconductor CsV3Sb5

Wu, Yueshen; Wang, Qi; Zhou, Xiang; Wang, Jinghui; Yu, Xuegong; He, Juan; Ding, Yifan; Teng, Botao; Zhang, Yiwen; Li, Yifei; Zhao, Chenglong; Zhang, Hongti; Liu, Jianpeng; Qi, Yanpeng; Watanabe, Kenji; Taniguchi, Takashi; Li, Jun

doi:10.1038/s41535-022-00516-9

Cited by 13 publications

(6 citation statements)

References 69 publications

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“…4(c), which is attributed to the vortex dynamics nature of nonreciprocal charge transport. [25] This value is much larger compared with known rectification effects in the low-dimensional noncentrosymmetric superconductors like NbSe 2 [24] and the topological kagome superconductor CsV 3 Sb 5 , [19] and competes with the largest one in T d -MoTe 2 thin film. [34,35] It should be noted that for a better comparison among different systems, the normalized coefficient γ = A ⊥ γ instead of γ is more appropriate.…”

Section: Resultsmentioning

confidence: 99%

“…This indicates that nonreciprocal charge transport here may have two distinct contributions which dominate in different current or magnetic field regimes. [19,21] Figures 4(a) and 4(b) show the maximum second harmonic resistance R 2ω…”

Section: Resultsmentioning

confidence: 99%

“…[14][15][16][17][18] In superconductors, the nonreciprocal response can be significantly elevated by orders of magnitude compared to non-superconducting systems, owing to the substantial energy scale disparity between the Fermi energy and the superconducting energy gap. [8,19,20] In the noncentrosymmetric superconductors, two types of nonreciprocal charge transport mechanisms have been proposed: [8] below the mean-field transition temperature T c , the nonreciprocal resistivity is determined from the dynamics of vortices; above T c , the fluctuation of the superconducting order parameter causes the excess paraconductivity, the extension of which gives the nonlinear response. However, the nonreciprocal superconducting transport has been discovered so far only in a few two-dimensional systems including MoS 2 , SrTiO 3 , NbSe 2 , etc., [21][22][23][24] and the quasi-two-dimensional system PbTaSe 2 .…”

Section: Introductionmentioning

confidence: 99%

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Nonreciprocal transport in the superconducting state of the chiral crystal NbGe₂

Liu 刘,

Xu 许,

He 何

et al. 2024

Chinese Phys. B

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Due to the lack of inversion, mirror or other roto-inversion symmetries, chiral crystals possess a well-defined handedness which, when combined with time-reversal symmetry breaking from the application of magnetic fields, can give rise to directional dichroism of the electrical transport phenomena via the magnetochiral anisotropy. In this study we investigate the nonreciprocal magneto-transport in microdevices of the NbGe2, a superconductor with structural chirality. A giant nonreciprocal signal from vortex motions is observed during the superconducting transition, with the ratio of nonreciprocal resistance to the normal resistance γ reaching 6×105 T-1 A-1. Interestingly, the intensity can be adjusted and even signreversed by varying the current, the temperature, and the crystalline orientation. Our findings illustrate intricate vortex dynamics and offer ways of manipulation on the rectification effect in superconductors with structural chirality.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nonreciprocal transport in the superconducting state of the chiral crystal NbGe₂

Liu 刘,

Xu 许,

He 何

et al. 2024

Chinese Phys. B

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“…Importantly, as emphasized in earlier works [36][37][38][39][40] , the structural deformation and symmetry breaking play a significant role in manipulating the properties of AV 3 Sb 5 . Since the CDW features lattice distortions, studies of the lattice degree of freedom can offer insight into the mechanism.…”

Section: Introductionmentioning

confidence: 88%

Light-induced topological phase transition via nonlinear phononics in superconductor CsV3Sb5

Tang,

Boi,

Cheng

2023

npj Quantum Mater.

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The recent observations of exotic quantum phenomena in AV3Sb5 (A = K, Rb, Cs) kagome superconductors have attracted significant attention in materials physics. Here, we propose an innovative two-frequencies laser model for ultrafast control of transient structural distortions. Using first-principles density functional theory in conjunction with the perturbative regime of nonlinear phononics, we investigate the nonharmonic potential energy, the crystal lattice dynamics and the topological properties of CsV3Sb5. We find that driving two infrared-active phonons of different frequencies promotes the desired Raman phonon vibrations, in which the displacement of Sb atoms is closely related to superconductivity. We demonstrate that the dimensional crossover and the topological nontrivial to trivial state transition of superconductor CsV3Sb5 can be triggered by ultrafast optical control. This work can be applied to other layered quantum materials and provide guidance for experiments related to photoinduced topology and superconductivity.

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“…It is found that T c shows a nonmonotonic dependence on the thickness in CsV 3 Sb 5 . 48 Nonreciprocal charge transport behaviors were observed in CsV 3 Sb 5 thin flakes, exhibiting pronounced second harmonic signals in the superconducting state. It may be related to the intrinsic symmetry breaking arising from the unconventional superconducting state.…”

Section: Csv 3 Sbmentioning

confidence: 99%

Topological Quantum Materials with Kagome Lattice

Wang,

Lei,

et al. 2024

Acc. Mater. Res.

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Metrics & MoreArticle Recommendations CONSPECTUS: Recently, various topological states have undergone a spurt of progress in the field of condensed matter physics. An emerging category of topological quantum materials with kagome lattice has drawn enormous attention. A two-dimensional kagome lattice composed of corner-sharing triangles is a fascinating structural system, which could not only lead to geometrically frustrated magnetism but also have a nontrivial topological electronic structure hosting Dirac points, van Hove singularities, and flat bands. Due to the existence of multiple spin, charge, and orbit degrees of freedom accompanied by the unique structure of the kagome lattice, the interplay between frustrated magnetism, nontrivial topology, and correlation effects is considered to result in abundant quantum states and provides a platform for researching the emergent electronic orders and their correlations.In this Account, we will give an overview of our research progress on novel quantum properties in topological quantum materials with kagome lattice. Here, there are mainly two categories of kagome materials: magnetic kagome materials and nonmagnetic ones. On one hand, magnetic kagome materials mainly focus on the 3d transition-metal-based kagome systems, including Fe 3 Sn 2 , Co 3 Sn 2 S 2 , YMn 6 Sn 6 , FeSn, and CoSn. The interplay between magnetism and topological bands manifests vital influence on the electronic response. For example, the existence of massive Dirac or Weyl fermions near the Fermi level significantly enhances the magnitude of Berry curvature in momentum space, leading to a large intrinsic anomalous Hall effect. In addition, the peculiar frustrated structure of kagome materials enables them to host a topologically protected skyrmion lattice or noncoplanar spin texture, yielding a topological Hall effect that arises from the real-space Berry phase. On the other hand, nonmagnetic kagome materials in the absence of long-range magnetic order include CsV 3 Sb 5 with the coexistence of superconductivity, charge density wave state, and band topology and van der Waals semiconductor Pd 3 P 2 S 8 . For these two kagome materials, the tunability of electric response in terms of high pressure or carrier doping helps to reveal the interplay between electronic correlation effects and band topology and discover the novel emergent quantum phenomena in kagome materials.

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Nonreciprocal charge transport in topological kagome superconductor CsV3Sb5

Cited by 13 publications

References 69 publications

Nonreciprocal transport in the superconducting state of the chiral crystal NbGe₂

Nonreciprocal transport in the superconducting state of the chiral crystal NbGe₂

Light-induced topological phase transition via nonlinear phononics in superconductor CsV3Sb5

Topological Quantum Materials with Kagome Lattice

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Nonreciprocal charge transport in topological kagome superconductor CsV3Sb5

Cited by 13 publications

References 69 publications

Nonreciprocal transport in the superconducting state of the chiral crystal NbGe2

Nonreciprocal transport in the superconducting state of the chiral crystal NbGe2

Light-induced topological phase transition via nonlinear phononics in superconductor CsV3Sb5

Topological Quantum Materials with Kagome Lattice

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Product

Resources

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Nonreciprocal transport in the superconducting state of the chiral crystal NbGe₂

Nonreciprocal transport in the superconducting state of the chiral crystal NbGe₂