High quantum oscillation frequencies and nontrivial topology in kagome superconductor 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>KV</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>
 probed by torque magnetometry up to 45 T

Shrestha, K.; Shi, Mengzhu; Regmi, Binod; Nguyen, Thinh; Miertschin, Duncan; Fan, Kuo-Chin; Deng, Liangzi; Aryal, Niraj; Kim, S.-G.; Graf, David; Chen, X.; Chu, Ching-Wu

doi:10.1103/physrevb.107.155128

Cited by 8 publications

(4 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2(c) are novel and have never been reported previously. Our recent torque measurements of other AV 3 Sb 5 family members (CsV 3 Sb 5 and KV 3 Sb 5 ) under high fields up to 45 T, together with results reported by other groups [19,[22][23][24]31] have shown multiple quantum oscillation frequencies with values as high as 10 kT. Therefore, the observation of high frequencies in RbV 3 Sb 5 is consistent with the findings for KV 3 Sb 5 and CsV 3 Sb 5 , and these high frequencies might also have the same origin, i. e., Fermi surface reconstruction due to the CDW order [19,23].…”

Section: Resultssupporting

confidence: 85%

“…Therefore, our detailed high field studies of RbV 3 Sb 5 , together with our previous reports [22,31], confirm that high quantum oscillation frequencies, relatively heavy m * , 2D Fermi surfaces, etc. are present in all members of the AV 3 Sb 5 compound family.…”

Section: Discussionsupporting

confidence: 88%

“…Using the experimental results for m * , T D , and k F , we have estimated different physical parameters characterizing the Fermi surfaces of RbV 3 Sb 5 , as listed in Table 1. There exists no previously reported data on RbV 3 Sb 5 for comparison, but these Fermi surface parameters are comparable with those for CsV 3 Sb 5 and KV 3 Sb 5 [22,31].…”

Section: Resultssupporting

confidence: 60%

“…In our previous high-field torque magnetometry studies of CsV 3 Sb 5 and KV 3 Sb 5 [22,31], we reported very high quantum oscillation frequencies up to 3000 T, the presence of 2D Fermi surfaces, and heavy effective masses of charge carriers (compared to other topological systems).…”

Section: Discussionmentioning

confidence: 81%

See 3 more Smart Citations

Fermi surface mapping of the kagome superconductor RbV3Sb5 using de Haas-van Alphen oscillations

et al. 2023

View full text Add to dashboard Cite

We present the results from torque magnetometry studies of the kagome superconductor RbV3Sb5 under applied fields up to 45 T and temperatures down to liquid 3 He temperature (0.32 K). The torque signal shows clear de Haas-van Alphen (dHvA) oscillations with eight distinct frequencies ranging from ∼ 150 T to 3000 T. Among these, five are above 500 T. Angle-dependent measurement of dHvA shows that all frequencies follow 1/cosθ dependence, where θ is the tilt angle with respect to the applied field direction, and the oscillations disappear above θ = 60 o , which confirms that the Fermi surfaces corresponding to these frequencies are two dimensional. The Berry phase (φ), calculated by constructing a Landau level fan diagram, is found to be ∼ π, which strongly supports the non-trivial topology of RbV3Sb5. Using the Lifshitz-Kosevich formula, we estimate the effective mass (m * ) of charge carriers in RbV3Sb5, and it is found to be heavier (∼ 0.7mo, where mo is the free electron mass) than that for other topological insulators. The findings of high frequencies up to 3000 T in RbV3Sb5 have not been reported previously, and the results regarding the Fermi surface of RbV3Sb5 are crucial for understanding the charge density wave order, superconductivity, and non-trivial topology in AV3Sb5 (A = K, Rb, and Cs), as well as the interplay among them.

show abstract

Section: Resultssupporting

confidence: 85%

Section: Discussionsupporting

confidence: 88%

Section: Resultssupporting

confidence: 60%

Section: Discussionmentioning

confidence: 81%

See 2 more Smart Citations

Fermi surface mapping of the kagome superconductor RbV3Sb5 using de Haas-van Alphen oscillations

et al. 2023

View full text Add to dashboard Cite

show abstract

Distinct switching of chiral transport in the kagome metals KV3Sb5 and CsV3Sb5

Guo,

van Delft,

Gutierrez-Amigo

et al. 2024

npj Quantum Mater.

View full text Add to dashboard Cite

The kagome metals AV3Sb5 (A = K, Rb, Cs) present an ideal sandbox to study the interrelation between multiple coexisting correlated phases such as charge order and superconductivity. So far, no consensus on the microscopic nature of these states has been reached as the proposals struggle to explain all their exotic physical properties. Among these, field-switchable electric magneto-chiral anisotropy (eMChA) in CsV3Sb5 provides intriguing evidence for a rewindable electronic chirality, yet the other family members have not been likewise investigated. Here, we present a comparative study of magneto-chiral transport between CsV3Sb5 and KV3Sb5. Despite their similar electronic structure, KV3Sb5 displays negligible eMChA, if any, and with no field switchability. This is in stark contrast to the non-saturating eMChA in CsV3Sb5 even in high fields up to 35 T. In light of their similar band structures, the stark difference in eMChA suggests its origin in the correlated states. Clearly, the V kagome nets alone are not sufficient to describe the physics and the interactions with their environment are crucial in determining the nature of their low-temperature state.

show abstract

AV3Sb5 kagome superconductors

Wilson,

Ortiz

2024

Nat Rev Mater

View full text Add to dashboard Cite

High quantum oscillation frequencies and nontrivial topology in kagome superconductor KV3Sb5 probed by torque magnetometry up to 45 T

Cited by 8 publications

References 46 publications

Fermi surface mapping of the kagome superconductor RbV3Sb5 using de Haas-van Alphen oscillations

Fermi surface mapping of the kagome superconductor RbV3Sb5 using de Haas-van Alphen oscillations

Distinct switching of chiral transport in the kagome metals KV3Sb5 and CsV3Sb5

AV3Sb5 kagome superconductors

Contact Info

Product

Resources

About