Nontrivial Fermi surface topology of the kagome superconductor 
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 probed by de Haas–van Alphen oscillations

Shrestha, K.; Chapai, Ramakanta; Pokharel, Bal K.; Miertschin, Duncan; Nguyen, Thinh; Zhou, Xuefeng; Chung, Duck Young; Kanatzidis, M. G.; Mitchell, J. F.; Welp, U.; Popović, Dragana; Graf, David; Lorenz, B.; Kwok, W. K.

doi:10.1103/physrevb.105.024508

Cited by 33 publications

(31 citation statements)

References 29 publications

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“…Our calculations agree better with Shrestha et al 31 and Broyles et al 35 (except the large value 2.90 for the observed frequency 221 T) in the low-frequency region. In the medium-and high-frequency regions, experiments 29,31,34,35 found effective masses typical from 0.3 to 1.7. In general, our calculated m * at −40 and −85 meV are within experimental ranges, by considering the uncertainty of Fermi energy in experiments.…”

Section: (B)and(d)supporting

confidence: 89%

“…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%

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

Yan

Tan

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.

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Section: (B)and(d)supporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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

Yan

Tan

et al. 2023

Preprint

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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%

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.

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“…Angle-resolved photoemission spectroscopy (ARPES) measurements [Fig. 2(a)] and quantum oscillations 4,68,69 reveal the presence of multiple Dirac points near the Fermi surface and with corresponding topological protected surface states that occur at the M points [a time-reversal invariant momentum (TRIM) point] in the Brillouin zone in addition to small Fermi surfaces with low effective mass and non-zero Berry phases. This is found to be consistent with calculations of the electronic band structure with density functional theory (DFT), where one also identifies the existence of these features.…”

Section: Nontrivial Band Topologymentioning

confidence: 99%

Electronic properties of correlated kagomé metals AV3Sb5 (A = K, Rb, and Cs): A perspective

Nguyễn

2022

Journal of Applied Physics

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Following the discovery of a new family of kagomé prototypical materials with structure AV 3 Sb 5 (A ¼ K, Rb, and Cs), there has been a heightened interest in studying the correlation-driven electronic phenomena in these kagomé lattice systems. The study of these materials has gone beyond magneto-transport measurements to reveal exciting features such as Dirac bands, anomalous Hall effect, bulk superconductivity with T c 0:9À2:5 K, and the observation of charge density wave instabilities, suggesting an intertwining of topological physics and new quantum orders. Moreover, very recent works on numerous types of experiments have appeared further examining the unconventional superconductivity and the exotic electronic states found within these kagomé materials. Theories on the strong interactions that play a role in these systems have been proposed to shed light on the nature of these topological charge density waves. In this brief review, we summarize these recent experimental findings and theoretical proposals and envision the materials as new platforms to study the interplay between topological physics and strongly correlated electronic systems.

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Nontrivial Fermi surface topology of the kagome superconductor CsV3Sb5 probed by de Haas–van Alphen oscillations

Cited by 33 publications

References 29 publications

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

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

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

Electronic properties of correlated kagomé metals AV3Sb5 (A = K, Rb, and Cs): A perspective

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