Quantum oscillations and magnetic field induced Fermi surface reconstruction in the charge density wave state of A0.9Mo6O17 (A=Na,K)

2020 ◽  
Vol 102 (23) ◽  
Author(s):  
H. P. Zhu ◽  
M. Yang ◽  
J. Z. Ke ◽  
H. K. Zuo ◽  
T. Peng ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fermi Surface ◽  
Charge Density ◽  
Surface Reconstruction ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave State ◽  
Quantum Oscillations ◽  
Fermi Surface Reconstruction

scholarly journals Fermi Surface Reconstruction and Electron Dynamics at the Charge-Density-Wave Transition in TiSe2

2020 ◽  
Vol 124 (16) ◽  
Author(s):  
Patrick Knowles ◽  
Bo Yang ◽  
Takaki Muramatsu ◽  
Owen Moulding ◽  
Jonathan Buhot ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Charge Density ◽  
Surface Reconstruction ◽  
Charge Density Wave ◽  
Density Wave ◽  
Electron Dynamics ◽  
Fermi Surface Reconstruction

scholarly journals Electronic nature of charge density wave and electron-phonon coupling in kagome superconductor KV3Sb5

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Hailan Luo ◽  
Qiang Gao ◽  
Hongxiong Liu ◽  
Yuhao Gu ◽  
Dingsong Wu ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Fermi Surface ◽  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Phonon Coupling ◽  
Electronic Nature ◽  
Electron Phonon Coupling ◽  
Gap Opening ◽  
Fermi Surface Reconstruction

AbstractThe Kagome superconductors AV3Sb5 (A = K, Rb, Cs) have received enormous attention due to their nontrivial topological electronic structure, anomalous physical properties and superconductivity. Unconventional charge density wave (CDW) has been detected in AV3Sb5. High-precision electronic structure determination is essential to understand its origin. Here we unveil electronic nature of the CDW phase in our high-resolution angle-resolved photoemission measurements on KV3Sb5. We have observed CDW-induced Fermi surface reconstruction and the associated band folding. The CDW-induced band splitting and the associated gap opening have been revealed at the boundary of the pristine and reconstructed Brillouin zones. The Fermi surface- and momentum-dependent CDW gap is measured and the strongly anisotropic CDW gap is observed for all the V-derived Fermi surface. In particular, we have observed signatures of the electron-phonon coupling in KV3Sb5. These results provide key insights in understanding the nature of the CDW state and its interplay with superconductivity in AV3Sb5 superconductors.

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