scholarly journals Dimer impurity scattering, reconstructed Fermi-surface nesting, and density-wave diagnostics in iron pnictides

2012 ◽  
Vol 85 (22) ◽  
Author(s):  
Jian Kang ◽  
Zlatko Tešanović
Keyword(s):  
Fermi Surface ◽  
Density Wave ◽  
Impurity Scattering ◽  
Iron Pnictides ◽  
Fermi Surface Nesting

scholarly journals Interplay between magnetic properties and Fermi surface nesting in iron pnictides

2009 ◽  
Vol 79 (14) ◽  
Author(s):  
A. N. Yaresko ◽  
G.-Q. Liu ◽  
V. N. Antonov ◽  
O. K. Andersen
Keyword(s):  
Magnetic Properties ◽  
Fermi Surface ◽  
Iron Pnictides ◽  
Fermi Surface Nesting

ELECTRON MAGNETIC RESONANCE FERMI SURFACE IMAGING: APPLICATIONS TO ORGANIC CONDUCTORS AND Sr2RuO4

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3109-3112
Author(s):  
S. HILL ◽  
A. KOVALEV ◽  
M. M. MOLA ◽  
C. PALASSIS ◽  
Z. Q. MAO ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Cyclotron Resonance ◽  
Charge Density Wave ◽  
Density Wave ◽  
Organic Conductors ◽  
Metallic State ◽  
Surface Imaging ◽  
Two Dimensional ◽  
Fermi Surfaces ◽  
Fermi Surface Nesting

We report detailed angle dependent studies of the metallic state microwave (40 to 200 GHz) magneto-conductivity of single crystal samples of the α- (BEDT-TTF) 2 KHg(SCN) 4 organic charge density wave conductor, and the perovskite superconductor Sr 2 RuO 4. We observe series' of resonant absorptions which we attribute to periodic orbit resonances - a phenomenon closely related to cyclotron resonance. By performing measurements on several samples, and in different electromagnetic field configurations, we are able to couple to different orbital modes (+ harmonics), which derive from deformations (warpings) of the quasi-one and quasi-two-dimensional Fermi surfaces of these compounds. These studies provide vital information concerning interlayer dispersion which, in turn, affects the Fermi surface nesting characteristics which are believed to play a crucial role in the low temperature physics of these exotic materials.

scholarly journals Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi2B2C

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Philipp Kurzhals ◽  
Geoffroy Kremer ◽  
Thomas Jaouen ◽  
Christopher W. Nicholson ◽  
Rolf Heid ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Inelastic Neutron Scattering ◽  
Density Wave ◽  
Momentum Dependence ◽  
Phonon Coupling ◽  
Electronic Band ◽  
Electron Momentum ◽  
Electron Phonon Coupling ◽  
Wide Range ◽  
Fermi Surface Nesting

AbstractElectron-phonon coupling, i.e., the scattering of lattice vibrations by electrons and vice versa, is ubiquitous in solids and can lead to emergent ground states such as superconductivity and charge-density wave order. A broad spectral phonon line shape is often interpreted as a marker of strong electron-phonon coupling associated with Fermi surface nesting, i.e., parallel sections of the Fermi surface connected by the phonon momentum. Alternatively broad phonons are known to arise from strong atomic lattice anharmonicity. Here, we show that strong phonon broadening can occur in the absence of both Fermi surface nesting and lattice anharmonicity, if electron-phonon coupling is strongly enhanced for specific values of electron-momentum, k. We use inelastic neutron scattering, soft x-ray angle-resolved photoemission spectroscopy measurements and ab-initio lattice dynamical and electronic band structure calculations to demonstrate this scenario in the highly anisotropic tetragonal electron-phonon superconductor YNi2B2C. This new scenario likely applies to a wide range of compounds.

Thermopower behavior inLa2Mo2O7: A possible charge-density-wave system with partial Fermi-surface nesting

1989 ◽  
Vol 40 (13) ◽  
pp. 9312-9314 ◽  
Author(s):  
K. Surendranath ◽  
C. Bansal ◽  
M. Greenblatt ◽  
W. H. McCarroll
Keyword(s):  
Fermi Surface ◽  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave System ◽  
Fermi Surface Nesting

scholarly journals Fermi surface nesting and charge-density wave formation in rare-earth tritellurides

2005 ◽  
Vol 71 (8) ◽  
Author(s):  
J. Laverock ◽  
S. B. Dugdale ◽  
Zs. Major ◽  
M. A. Alam ◽  
N. Ru ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fermi Surface ◽  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave Formation ◽  
Fermi Surface Nesting

Phonon Dispersion and Electronic Structure In Quasi-one- Dimensional Layered Ta2NiSe7 Single Crystal

2020 ◽  
Author(s):  
Haiping Chen ◽  
Zhongti Sun
Keyword(s):  
Electronic Structure ◽  
Fermi Surface ◽  
Single Crystal ◽  
Charge Density ◽  
Charge Density Wave ◽  
Phonon Dispersion ◽  
Density Wave ◽  
Layered Systems ◽  
One Dimensional ◽  
Fermi Surface Nesting

The formation mechanism of charge density wave (CDW) order in layered systems was belived to arise from phonon-electron coupling and electronic structure instability induced by Fermi surface nesting. Herein, we...

Uniaxial Fermi-surface nesting and spin-density-wave transition in the heavy-fermion compoundCe(Ru0.85Rh0.15)2Si2

1997 ◽  
Vol 56 (17) ◽  
pp. 11092-11096 ◽  
Author(s):  
S. Murayama ◽  
C. Sekine ◽  
A. Yokoyanagi ◽  
K. Hoshi ◽  
Y. Ōnuki
Keyword(s):  
Fermi Surface ◽  
Spin Density ◽  
Heavy Fermion ◽  
Density Wave ◽  
Spin Density Wave ◽  
Fermi Surface Nesting
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