Fermi-surface and low-energy excitation spectrum ofYBa2Cu3O7: Role of the Ba-O plane

1992 ◽  
Vol 45 (9) ◽  
pp. 5103-5106 ◽  
Author(s):  
I. I. Mazin ◽  
O. Jepsen ◽  
O. K. Andersen ◽  
A. I. Liechtenstein ◽  
S. N. Rashkeev ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Excitation Spectrum ◽  
Low Energy ◽  
Energy Excitation

ROLE OF THE ELECTRON–PHONON INTERACTION ON THE SPECTRAL DENSITY AND PSEUDOGAP IN CUPRATES

2002 ◽  
Vol 16 (23) ◽  
pp. 3465-3471
Author(s):  
I. CHAUDHURI ◽  
S. K. GHATAK
Keyword(s):  
Critical Temperature ◽  
Spectral Density ◽  
Low Energy ◽  
Phonon Interaction ◽  
Energy Excitation ◽  
Electron Phonon Interaction ◽  
Peak Structure ◽  
Electronic Model ◽  
Jahn Teller

The pseudogap structure in low energy excitation in cuprates appears below a temperature and the spectral density exhibits strong wave-vector dependence. An electronic model that emphasized the coupling of carrier in Cu-O with phonon is examined for pseudogap. The electron–phonon interaction originates from the modulation of on-site and hopping energy and leads to spontaneous Jahn–Teller-like distortion and pseudogap below a critical temperature. At low temperature the spectral density has two-peak structure about the Fermi level for all k along Γ-M whereas such structure exists along Γ-X for small k only. The magnitude of pseudogap shows strong k-dependence — maximum along Γ-M and vanishes along Γ-X. These features emphasize the role of electron–phonon interaction in formation of pseudogap.

Low energy excitation spectrum and Cu(2) spin-lattice relaxation from the singlet correlated band in YBa2Cu4O8

1994 ◽  
Vol 235-240 ◽  
pp. 2257-2258 ◽  
Author(s):  
R. Markendorf ◽  
M.V. Eremin ◽  
S.V. Varlamov ◽  
D. Brinkmann ◽  
M. Mali ◽  
...  
Keyword(s):  
Excitation Spectrum ◽  
Lattice Relaxation ◽  
Low Energy ◽  
Spin Lattice Relaxation ◽  
Energy Excitation ◽  
Spin Lattice

scholarly journals Fine-structure in the low-energy excitation spectrum of a high-Tcsuperconductor by polarization-dependent photoemission

2001 ◽  
Vol 63 (10) ◽  
Author(s):  
R. Manzke ◽  
R. Müller ◽  
C. Janowitz ◽  
M. Schneider ◽  
A. Krapf ◽  
...  
Keyword(s):  
Fine Structure ◽  
Excitation Spectrum ◽  
Low Energy ◽  
Energy Excitation

scholarly journals Low-energy excitation spectrum of one-dimensional dipolar quantum gases

2008 ◽  
Vol 77 (21) ◽  
Author(s):  
S. De Palo ◽  
E. Orignac ◽  
R. Citro ◽  
M. L. Chiofalo
Keyword(s):  
Excitation Spectrum ◽  
Quantum Gases ◽  
Low Energy ◽  
Energy Excitation ◽  
One Dimensional

scholarly journals The excitation spectrum of the Bose gas in the Gross–Pitaevskii regime

2020 ◽  
pp. 2060006
Author(s):  
Chiara Boccato
Keyword(s):  
Excitation Spectrum ◽  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Bose Gas ◽  
Low Energy ◽  
Side Length ◽  
Joint Work ◽  
Energy Excitation

We consider a gas of interacting bosons trapped in a box of side length one in the Gross–Pitaevskii limit. We review the proof of the validity of Bogoliubov’s prediction for the ground state energy and the low-energy excitation spectrum. This note is based on joint work with C. Brennecke, S. Cenatiempo and B. Schlein.

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