Low-energy excitation spectra of the system KY(MoO4)2-KEr(MoO4)2

1996 ◽  
Vol 46 (S5) ◽  
pp. 2687-2688
Author(s):  
Vladimir I. Kut'ko ◽  
Nina M. Nesterenko ◽  
Yuriy N. Kharchenko
Keyword(s):  
Low Energy ◽  
Excitation Spectra ◽  
Energy Excitation

scholarly journals Low Energy Excitation Spectra of Trapped Bose Condensates

1998 ◽  
Vol 93 (1) ◽  
pp. 211-235 ◽  
Author(s):  
L. You ◽  
W. Hoston ◽  
M. Lewenstein ◽  
M. Marinescu
Keyword(s):  
Low Energy ◽  
Excitation Spectra ◽  
Energy Excitation ◽  
Bose Condensates

scholarly journals Resonant excitation of molecules by low-energy electrons

2008 ◽  
Vol 6 (1) ◽  
pp. 41-55 ◽  
Author(s):  
Goran Poparic
Keyword(s):  
Cross Sections ◽  
Valence State ◽  
Vibrational Excitation ◽  
Rydberg States ◽  
Low Energy ◽  
Resonant Excitation ◽  
Excitation Spectra ◽  
Energy Excitation ◽  
The Cross ◽  
Near Threshold

Low-energy electron impact vibrational and electronic excitation cross sections of the CO, N2 and CO2 molecules are measured by use of a high resolution crossed-beams double trochoidal electron spectrometer. The spectrometer is designed to work in standard and time-of-flight regimes. The energy dependences of the resonant vibrational excitation of the first several vibrational levels of the N2, CO, and CO2 molecules, have been measured. Characteristic substructures in energy excitation spectra in the cases of N2 and CO have been obtained and discussed for some vibrational channels for the first time. The ratio of forward-to-backward scattered electrons from the 2? resonance in CO is found to be equal to 1, and thus the angular distribution of scattered electrons to be symmetric relative to 90?. This conclusion supports the fact that the contribution of the p? partial wave is dominant in the energy region of the 2? resonance in CO. The energy dependences of the near threshold resonant excitation of the valence and Rydberg states of the N2 and CO molecules have been measured. The cross sections of the near threshold resonant excitation of the C 3?u valence state, and the E 3?+ g and a'' 1?+ g Rydberg states of the N2 molecule have been measured. In the case of the CO molecule, the cross sections of the near threshold resonant excitation of the a 3? valence state, and the b 3?+ and B 1?+ Rydberg states have been measured. Resonant structures in excitation functions of all measured electronic states are observed and their locations are compared with resonances obtained in different decay channels.

scholarly journals Low-Energy Excitation Spectra in the Excitonic Phase of Cobalt Oxides

2017 ◽  
Vol 86 (4) ◽  
pp. 043701 ◽  
Author(s):  
Tomoki Yamaguchi ◽  
Koudai Sugimoto ◽  
Yukinori Ohta
Keyword(s):  
Low Energy ◽  
Cobalt Oxides ◽  
Excitation Spectra ◽  
Energy Excitation

Low-Energy Excitation in β-Cu2Se

1989 ◽  
Vol 58 (9) ◽  
pp. 3061-3064 ◽  
Author(s):  
Takashi Sakuma ◽  
Kaoru Shibata
Keyword(s):  
Low Energy ◽  
Energy Excitation

Low energy excitation and fast motion near Tg in amorphous polymers

1994 ◽  
Vol 172-174 ◽  
pp. 327-335 ◽  
Author(s):  
T Kanaya ◽  
T Kawaguchi ◽  
K Kaji
Keyword(s):  
Amorphous Polymers ◽  
Low Energy ◽  
Energy Excitation ◽  
Fast Motion

Inelastic neutron scattering and low-energy excitation of amorphous SF6 hydrate prepared by vapor-deposition technique

2003 ◽  
Vol 81 (1-2) ◽  
pp. 107-114 ◽  
Author(s):  
O Yamamuro ◽  
T Matsuo ◽  
I Tsukushi ◽  
N Onoda-Yamamuro
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Annealed Sample ◽  
Low Energy ◽  
Energy Excitation ◽  
Hydrogen Bond Formation ◽  
Crystalline Sample ◽  
Two Samples ◽  
Vapor Deposition Technique

Amorphous SF6 hydrate (SF6·17H2O) was prepared by depositing the mixed vapor onto a substrate kept at about 8 K. The inelastic neutron-scattering spectra of the as-deposited sample and those annealed at about 120 and 150 K were measured at 50 K in the energy range below 100 meV. The first two samples were considered to be in amorphous states while the third one was in a crystalline state. The librational frequency of the water molecule (at around 60 meV) is smaller in the order of (as-deposited sample) < (annealed sample) < (crystalline sample). This indicates that the strength of the intermolecular hydrogen bonds is (crystalline sample) > (annealed sample) > (as-deposited sample). The spectra below 10 meV were compared with our previous data of pure vapor-deposited amorphous ices and those doped with methanol (CD3OH). The low-energy excitation (E < 6 meV) differed drastically depending on the dopants, i.e., the scattering intensity was enhanced by methanol doping but reduced by SF6 doping. This may be because the hydrogen-bond formation was hindered by methanol doping but promoted rather more by SF6 doping because of the hydrophobic interaction as in clathrate hydrates. PACS Nos.: 61.12Ex, 63.50tx

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.

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