Emergence of large quantum oscillation frequencies in thin flakes of the kagome superconductor 
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Zhang, Wei; Wang, Lingfei; Tsang, Chun Wai; Liu, Xinyou; Xie, Jianyu; Yu, Wing Yiu; Lai, Kwing To; Goh, Swee K.

doi:10.1103/physrevb.106.195103

Cited by 23 publications

(16 citation statements)

References 55 publications

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“…We summarized exhaustively recent quantum oscillation measurements [27][28][29][30][31][32][33][34][35] in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The recently discovered kagome superconductors AV 3 Sb 5 (A = K, Rb, Cs) 1 stimulate extensive studies for their intriguing charge density waves (CDW) 2-10 , possible symmetry-breaking without magnetism 2,11-20 , topological band structure 3,4, [21][22][23] , and exotic superconductivity 5, [24][25][26] . Aiming at deriving the Fermi surface (FS) property of CsV 3 Sb 5 , a dozen quantum oscillation experiments reveal complicated but similar oscillation frequencies [27][28][29][30][31][32][33][34][35] , bearing the Fermi energy variation in different samples. However, the non-trivial Fermi pockets (or quantum orbits), characterized by a π phase shift in the fundamental quantum oscillation, are dissimilar in different reports.…”

Section: Introductionmentioning

confidence: 99%

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Emergent topological quantum orbits in the charge density wave phase of kagome metal CsV$_3$Sb$_5$

Tan¹,

Li²,

Liu³

et al. 2023

Preprint

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The recently discovered kagome materials AV3Sb5 (A = K, Rb, Cs) attract intense research interest in intertwined topology, superconductivity, and charge density waves (CDW). Although the in-plane 2 × 2 CDW is well studied, its out-of-plane structural correlation with the Fermi surface properties is less understood. In this work, we advance the theoretical description of quantum oscillations and investigate the Fermi surface properties in the three-dimensional CDW phase of CsV3Sb5. We derived Fermi-energy-resolved and layer-resolved quantum orbits that agree quantitatively with recent experiments in the fundamental frequency, cyclotron mass, and topology. We reveal a complex Dirac nodal network that would lead to a π Berry phase of a quantum orbit in the spinless case. However, the phase shift of topological quantum orbits is contributed by the orbital moment and Zeeman effect besides the Berry phase in the presence of spin-orbital coupling (SOC). Therefore, we can observe topological quantum orbits with a π phase shift in otherwise trivial orbits without SOC, contrary to common perception. Our work reveals the rich topological nature of kagome materials and paves a path to resolve different topological origins of quantum orbits.

show abstract

“…We summarized exhaustively recent quantum oscillation measurements [27][28][29][30][31][32][33][34][35] in Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Emergent topological quantum orbits in the charge density wave phase of kagome metal CsV$_3$Sb$_5$

Tan¹,

Li²,

Liu³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…We summarized exhaustively recent quantum oscillation measurements [27][28][29][30][31][32][33][34][35] in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The recently discovered kagome superconductors AV 3 Sb 5 (A = K, Rb, Cs) 1 stimulate extensive studies for their intriguing charge density waves (CDW) [2][3][4][5][6][7][8][9][10] , possible symmetry-breaking without magnetism 2,[11][12][13][14][15][16][17][18][19][20] , topological band structure 3,4,[21][22][23] , and exotic superconductivity 5,[24][25][26] . Aiming at deriving the Fermi surface (FS) property of CsV 3 Sb 5 , a dozen quantum oscillation experiments reveal complicated but similar oscillation frequencies [27][28][29][30][31][32][33][34][35] , bearing the Fermi energy variation in different samples. However, the non-trivial Fermi pockets (or quantum orbits), characterized by a π phase shift in the fundamental quantum oscillation, are dissimilar in different reports.…”

Section: Introductionmentioning

confidence: 99%

Emergent topological quantum orbits in the charge density wave phase of kagome metal CsV3Sb5

Yan

Tan

et al. 2023

Preprint

View full text Add to dashboard Cite

The recently discovered kagome materials AV3Sb5 (A = K, Rb, Cs) attract intense research interest in intertwined topology, superconductivity, and charge density waves (CDW). Although the in-plane 2×2 CDW is well studied, its out-of-plane structural correlation with the Fermi surface properties is less understood. In this work, we advance the theoretical description of quantum oscillations and investigate the Fermi surface properties in the three-dimensional CDW phase of CsV3Sb5. We derived Fermi-energy-resolved and layer-resolved quantum orbits that agree quantitatively with recent experiments in the fundamental frequency, cyclotron mass, and topology. We reveal a complex Dirac nodal network that would lead to a π Berry phase of a quantum orbit in the spinless case. However, the phase shift of topological quantum orbits is contributed by the orbital moment and Zeeman effect besides the Berry phase in the presence of spin-orbital coupling (SOC). Therefore, we can observe topological quantum orbits with a π phase shift in otherwise trivial orbits without SOC, contrary to common perception. Our work reveals the rich topological nature of kagome materials and paves a path to resolve different topological origins of quantum orbits.

show abstract

“…The properties of this system such as unconventional charge density waves [7][8][9][10] , superconductivity 6,11−14 , pair density waves 7 , giant anomalous Hall effect 15,16 , time-reversal symmetry breaking 17,18 , and electronic nematic order 7,11,19−21 have attracted much research and controversy. The band topology of this system also has been systematically studied by theoretical calculations, angle-resolved photoemission spectroscopy (ARPES), and quantum oscillations [22][23][24][25][26][27] .…”

Section: Introductionmentioning

confidence: 99%

de Haas–van Alphen oscillation reveals nontrivial Fermi surface topology in Kagome superconductor CsTi3Bi5

Dong

Zhang

et al. 2023

Preprint

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The Kagome lattice, naturally encompassing Dirac fermions, flat bands, and van Hove singularities, tends to intertwine exotic electronic states. Revealing the characteristics of its Fermi surface will help on clarifying the nature of the complex quantum phenomena in kagome material. Here we report the Fermi surface properties of the new kagome superconductor CsTi3Bi5 by the de Haas–van Alphen oscillations. The observed oscillations are clear and consist of six principal frequencies ranging from 214 T to 1013 T. The angular dependence of the frequency implies a quasi-two-dimensional electronic structure. In addition, the Berry phase corresponding to 281 T, determined by the Landau level fan diagram method and full Lifshitz-Kosevich formula fitting, yields a value close to π, which indicates a band structure with nontrivial topological property. These results underscore the potential of CsTi3Bi5 as a promising new platform to explore the interplay between topological order, electronic nematicity, and superconductivity.

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Emergence of large quantum oscillation frequencies in thin flakes of the kagome superconductor CsV3Sb5

Cited by 23 publications

References 55 publications

Emergent topological quantum orbits in the charge density wave phase of kagome metal CsV$_3$Sb$_5$

Emergent topological quantum orbits in the charge density wave phase of kagome metal CsV$_3$Sb$_5$

Emergent topological quantum orbits in the charge density wave phase of kagome metal CsV3Sb5

de Haas–van Alphen oscillation reveals nontrivial Fermi surface topology in Kagome superconductor CsTi3Bi5

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