Nodal superconductivity and superconducting domes in the topological Kagome metal CsV3Sb5

Li, Shiyan; Zhao, Chengcheng; Wang, Linshu; Xia, Wei; Yin, Qiangwei; Ni, Jiamin; Huang, Yuzhen; Tu, C. P.; Tao, Zicheng; Tu, Zhijun; Gong, Chunsheng; Lei, Hechang; Guo, Yanfeng; Yang, Xiaofan

doi:10.21203/rs.3.rs-404809/v1

Cited by 8 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shapley value method is a method of interest distribution in cooperative Game theory, which can scientifically and fairly distribute the interests of each unit according to the degree of contribution, and obtain the weight value of each unit (Li et al, 2021). This allocation approach can be well reflected in combination prediction.…”

Section: Shapley Value Methods Combined Prediction Theorymentioning

confidence: 99%

“…et al, 2023). Li et al (2021) combined the individual characteristic weight coefficient with the Shapley value of each hydropower station, and proposed a variable coefficient Shapley value method for compensation benefit distribution of multi owner cascade hydropower stations. Taking China's Nanhe Hydropower Station as an example, this method was compared with other typical distribution methods.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Combination prediction and error analysis of conventional gas production in Sichuan Basin

Li,

Yu,

Chen

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

The accurate prediction of the trend of natural gas production changes plays an important role in the formulation of development planning plans. The conventional gas exploration and development in Sichuan Basin has a long history. Based on the development of conventional natural gas production, the article uses the Hubbert model, Gauss model, and GM (1, N) model to predict conventional natural gas production, and then the Shapley value method is used to allocate the weight values of the three models, and a combination model for conventional gas production prediction is established. Finally, residual analysis and precision test are carried out on the prediction results. The results show that: 1) The combination model established using the Shapley value method can effectively combine the advantages of various models and improve the accuracy of prediction. And the standardized residual of the combined model is the lowest, the prediction is closest to the actual value, and the accuracy test is the best, indicating that the combined model has the highest accuracy. 2) After using a combination model for prediction, conventional gas production will peak in 2046, with a peak production of 412 × 108 m3, with a stable production period of (2038–2054) years, a stable production period of 17 years, and a stable production period of 389 × 108 m3, the predicted results of the combined model have a longer stable production period, and the trend of production changes is more stable. The use of combination model provides a reference for the field of natural gas prediction, while improving the accuracy of prediction results and providing better guidance for production planning.

show abstract

Section: Shapley Value Methods Combined Prediction Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combination prediction and error analysis of conventional gas production in Sichuan Basin

Li,

Yu,

Chen

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

“…Up to now, fruitful experiments have been actualized to understand the superconducting gap symmetry of CsV 3 Sb 5 , including thermal conductivity 18 , scanning tunneling spectroscopy measurements 19 , and penetration length measurements 20 . However, these results provided contradictory conclusions on the gap symmetry [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] . On the other hand, since the superconductivity coexists with CDW, their interplay should be also taken into account.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal charge transport in topological kagome superconductor CsV3Sb5

Wang

Zhou

et al. 2022

npj Quantum Mater.

View full text Add to dashboard Cite

Nonreciprocal charge transport phenomena are widely studied in two-dimensional superconductors, which demonstrate unidirectional-anisotropy magnetoresistances as a result of symmetry breaking. Here, we report a strong nonreciprocal transport phenomenon in superconducting CsV3Sb5 thin flakes. The second harmonic voltages, mainly originating from the rectification effect of vortex motion, are unambiguously developed with in-plane and out-of-plane magnetic fields, and their magnitudes are comparable to those in noncentrosymmetric superconductors. The second harmonic magnetoresistances split into several peaks and some of them reverse their signs by ramping the magnetic field or the current within the superconducting transition. The nonreciprocity suggests a strong asymmetry in CsV3Sb5. The centrosymmetric structure and symmetric electronic phases in CsV3Sb5 can hardly induce the distinct nonreciprocal transport phenomenon, which could be correlated to a symmetry breaking from an unconventional superconducting order parameter symmetry.

show abstract

“…Experimentally, however, the superconducting gap symmetry of AV 3 Sb 5 is highly controversial, and whether TRS is broken or not is still elusive. Thermal conductivity measurements in CsV 3 Sb 5 [29] and µSR measurements in Rb/KV 3 Sb 5 [30] have suggested a nodal gap structure. In contrast, magnetic penetration depth [31] and scanning tunneling spectroscopy (STS) [32] studies in CsV 3 Sb 5 have suggested a nodeless gap structure.…”

mentioning

confidence: 99%

Bulk evidence of anisotropic $s$-wave pairing with no sign change in the kagome superconductor CsV$_3$Sb$_5$

Roppongi¹,

Ishihara²,

Tanaka³

et al. 2022

Preprint

View full text Add to dashboard Cite

The recently discovered kagome superconductors AV 3 Sb 5 (A = K, Rb, Cs) [1-3] possess a unique band structure with van Hove singularities and Dirac dispersions [4,5], in which unusual charge-density-wave (CDW) orders with time-reversal and rotational symmetry breaking have been reported [6][7][8][9][10][11]. One of the most crucial unresolved issues is identifying the symmetry of the superconductivity that develops inside the CDW phase. Theory predicts a variety of unconventional superconducting symmetries, including exotic states with chiral and topological properties accompanied by a sign-changing superconducting gap [12][13][14][15][16]. Experimentally, however, the phase information on the superconducting gap in AV 3 Sb 5 is still lacking. Here we report the electron irradiation effects in CsV 3 Sb 5 using introduced impurities as a phase-sensitive probe of superconductivity. Our magnetic penetration depth measurements reveal that with increasing impurities, a highly anisotropic fully-gapped state changes gradually to an isotropic full-gap state without passing through a nodal state. Furthermore, transport measurements under high pressure show that the double superconducting dome in the pressure-temperature phase diagram survives against sufficient impurities. These results are strong bulk evidence that CsV 3 Sb 5 is a nonchiral, anisotropic s-wave superconductor with no sign change both at ambient and high pressure, which provides a clue to understanding the relationship between CDW and superconductivity in kagome superconductors.

show abstract

Nodal superconductivity and superconducting domes in the topological Kagome metal CsV3Sb5

Cited by 8 publications

References 32 publications

Combination prediction and error analysis of conventional gas production in Sichuan Basin

Combination prediction and error analysis of conventional gas production in Sichuan Basin

Nonreciprocal charge transport in topological kagome superconductor CsV3Sb5

Bulk evidence of anisotropic $s$-wave pairing with no sign change in the kagome superconductor CsV$_3$Sb$_5$

Contact Info

Product

Resources

About