Dominant Role of a Pseudogap in the Physics of the Colossal Magnetoresistive Oxides

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3389-3392 ◽  
Author(s):  
D. S. Dessau ◽  
T. Saitoh ◽  
C.-H. Park ◽  
Z.-X. Shen ◽  
Y. Moritomo ◽  
...  
Keyword(s):  
Dominant Role ◽  
Magnetic Ordering ◽  
High Energy ◽  
Spectral Weight ◽  
High Energy Resolution ◽  
Photoemission Spectroscopy ◽  
Colossal Magnetoresistive ◽  
Weight Density ◽  
Magnetic Ordering Temperature

We have performed direct electronic structure measurements of the colosssal magnetoresistive oxides using high energy resolution photoemission spectroscopy. A key result of these measurements is the discovery of a pseudogap which drastically supresses or completely removes the spectral weight (density of states) at the Fermi energy E F . It is shown that the pseudogap plays a dominant role in the "colossal" conductivity changes which occur across the magnetic ordering temperature. We briefly discuss possible origins for the pseudogap.

On the dominant role of the baryon variables in the description of high-multiplicity interactions at high energy

1968 ◽  
Vol 4 (7) ◽  
pp. 573-579 ◽  
Author(s):  
T. Hofmokl ◽  
L. Michejda ◽  
S. Otwinowski ◽  
R. Sosnowski ◽  
M. Szeptycka ◽  
...  
Keyword(s):  
Dominant Role ◽  
High Energy ◽  
High Multiplicity

scholarly journals Spin and Polarization in High-Energy Hadron-Hadron and Lepton-Hadron Scattering

Symmetry ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 1784
Author(s):  
László Jenkovszky
Keyword(s):  
Degrees Of Freedom ◽  
Dominant Role ◽  
Regge Pole ◽  
Deeply Virtual Compton Scattering ◽  
Virtual Compton Scattering ◽  
High Energy ◽  
Pomeron Trajectory ◽  
Complex Functions ◽  
Energy Hadron

The role of spin degrees of freedom in high-energy hadron-hadron and lepton-hadron scattering is reviewed with emphasis on the dominant role of soft, diffractive, non-perturbative effects. Explicit models based on analyticity and Regge-pole theory, including the pomeron trajectory (gluon exchange in the t channel) are discussed. We argue that there is a single, universal pomeron in Nature, manifest as relatively “soft” or “hard”, depending on the kinematics considered. Both the pomeron and the non-leading (secondary) Regge trajectories, made of quarks are non-linear, complex functions. They are populated by a finite number of resonances: known baryons and mesons in case of the reggeons and hypothetical glueballs in case of the pomeron (“oddballs” on the odderon trajectory). Explicit models and fits are presented that may be used in recovering generalized parton distributions from deeply virtual Compton scattering and electoproduction of vector mesons.

The role of Oad in the decomposition of NH3 adsorbed on Ir(110): a combined TPD and high-energy resolution fast XPS study

2005 ◽  
Vol 7 (13) ◽  
pp. 2629 ◽  
Author(s):  
C. J. Weststrate ◽  
J. W. Bakker ◽  
E. D. L. Rienks ◽  
C. P. Vinod ◽  
S. Lizzit ◽  
...  
Keyword(s):  
Energy Resolution ◽  
High Energy ◽  
High Energy Resolution ◽  
Xps Study ◽  
Decomposition Of Nh3

High energy resolution bandpass photon detector for inverse photoemission spectroscopy

2011 ◽  
Vol 82 (9) ◽  
pp. 093901 ◽  
Author(s):  
M. Maniraj ◽  
S. W. D’Souza ◽  
J. Nayak ◽  
Abhishek Rai ◽  
Sanjay Singh ◽  
...  
Keyword(s):  
Energy Resolution ◽  
High Energy ◽  
High Energy Resolution ◽  
Photoemission Spectroscopy ◽  
Photon Detector ◽  
Inverse Photoemission ◽  
Inverse Photoemission Spectroscopy

scholarly journals High-energy resolution X-ray spectroscopy at actinide M4,5 and ligand K edges: what we know, what we want to know, what we can know

2021 ◽  
Author(s):  
Kristina Kvashnina ◽  
Sergei M Butorin
Keyword(s):  
Electronic Structure ◽  
Energy Resolution ◽  
Chemical Properties ◽  
High Energy ◽  
High Energy Resolution ◽  
X Ray

In recent years, scientists have progressively recognized the role of electronic structure in the characterization of chemical properties for actinide containing materials. High-energy resolution X-ray spectroscopy at the actinide M4,5...

TEMPERATURE-DEPENDENT HIGH-RESOLUTION PHOTOEMISSION SPECTROSCOPY OF YbXCu4 (X=In, Cd, Mg)

2002 ◽  
Vol 09 (02) ◽  
pp. 1079-1083 ◽  
Author(s):  
H. SATO ◽  
Y. NISHIKAWA ◽  
F. NAGASAKI ◽  
H. FUJINO ◽  
Y. TAKEDA ◽  
...  
Keyword(s):  
High Resolution ◽  
Valence Band ◽  
Energy Resolution ◽  
High Energy ◽  
The Other ◽  
High Energy Resolution ◽  
Photoemission Spectroscopy ◽  
Temperature Dependent ◽  
Other Hand ◽  
Increasing Temperature

Valence-band and Yb 4d photoemission spectra of YbXCu 4 (X=In, Cd, Mg) have been measured with high energy resolution from 10 to 300 K. In the valence-band photoemission spectra of YbInCu 4 and YbCdCu 4, the structure due to the Yb 2+ 4f 7/2 states is clearly observed near the Fermi level (E F ) at 10 K. The intensity of the Yb 2+ 4f 7/2 structure decreases with increasing temperature and the structure almost disappears at 300 K. The amount of the enhancement from 50 to 107 K is much stronger for YbInCu 4 than for YbCdCu 4. On the other hand, the Yb 2+ 4f 7/2 structure of YbMgCu 4 is observed as a broad peak near E F and the spectra show little temperature dependence. In the Yb 4d photoemission spectra of YbInCu 4 and YbCdCu 4, the structures due to the Yb 2+ and Yb 3+ states are recognized. The intensity ratio Yb 2+/ Yb 3+ increases with decreasing temperature. In the Yb 4d spectra of YbMgCu 4, on the other hand, almost only structures due to Yb 2+ states are observed.

Characterization of oxide films on 4H-SiC epitaxial (0001¯) faces by high-energy-resolution photoemission spectroscopy: Comparison between wet and dry oxidation

2006 ◽  
Vol 100 (5) ◽  
pp. 053710 ◽  
Author(s):  
Yasuto Hijikata ◽  
Hiroyuki Yaguchi ◽  
Sadafumi Yoshida ◽  
Yasutaka Takata ◽  
Keisuke Kobayashi ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Oxide Films ◽  
High Energy ◽  
High Energy Resolution ◽  
Photoemission Spectroscopy ◽  
Dry Oxidation
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