scholarly journals Fermi Surface Deformation Near Charge-Ordering Transition

2011 ◽  
Vol 80 (12) ◽  
pp. 123707 ◽  
Author(s):  
Kazuyoshi Yoshimi ◽  
Takeo Kato ◽  
Hideaki Maebashi
Keyword(s):  
Fermi Surface ◽  
Surface Deformation ◽  
Charge Ordering ◽  
Ordering Transition

Synthesis, Structure and Magnetic Properties of Monoclinic Nb12O29

2000 ◽  
Vol 658 ◽  
Author(s):  
J. E. L. Waldron ◽  
M. A. Green
Keyword(s):  
Magnetic Properties ◽  
Magnetic Order ◽  
Bulk Sample ◽  
Charge Ordering ◽  
Rapid Reduction ◽  
One Dimensional ◽  
Range Magnetic Order ◽  
A Charge ◽  
Ordering Transition ◽  
Long Range Magnetic Order

ABSTRACTThe synthesis, structure and magnetic properties of monoclinic Nb12O29 are described. The synthesis of a pure bulk sample is difficult due to the large number of other similar phases. It is achieved by rapid reduction of H-Nb2O5 with Nb metal. The compound is shown to undergo a charge ordering transition at low temperature which provokes long range magnetic order in an intriguing one dimensional arrangement.

Ultrasonic Anomaly Near the Charge Ordering Transition in Sr-Doped Nd0.3La0.2Ca0.5−x Sr x MnO3 Manganites

2013 ◽  
Vol 27 (5) ◽  
pp. 1229-1234 ◽  
Author(s):  
S. Shamsuddin ◽  
S. N. Supardan ◽  
Abdel-Baset M. A. Ibrahim ◽  
A. K. Yahya
Keyword(s):  
Charge Ordering ◽  
Ordering Transition

Exploring the charge-ordering transition in via thermal expansion measurements

2010 ◽  
Vol 405 (11) ◽  
pp. S92-S94 ◽  
Author(s):  
Mariano de Souza ◽  
Daniel Hofmann ◽  
Pascale Foury-Leylekian ◽  
Alec Moradpour ◽  
Jean-Paul Pouget ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Charge Ordering ◽  
Ordering Transition

Charge ordering and superconductivity in α-(BEDT-TTF)$_2M$Hg(SCN)4

2002 ◽  
Vol 12 (9) ◽  
pp. 57-60
Author(s):  
M. Dressel ◽  
N. Drichko ◽  
B. Salameh ◽  
J. Thorns ◽  
J. Schlueter ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Quantum Phase Transition ◽  
Optical Conductivity ◽  
Short Range ◽  
Charge Ordering ◽  
Extended Hubbard Model ◽  
A Charge ◽  
Ordering Transition ◽  
Exact Diagonalisation

In the optical spectra of the non-superconducting salt α-(BEDT-TTF)2KHg(SCN)4 a strong feature appears at frequencies of about 200 cm-1 and temperatures below 200 K which indicates the opening of a pseudogap. This is in contrast to the superconducting α-(BEDT-TTF)2NH4Hg(SCN)4 whch exhlbits metallic-like optical properties down to 2 K. Based on exact diagonalisation calculations of the optical conductivity on an extended Hubbard model at quarter-filling we argue that the proximity of these salts to a charge ordering transition is responsible for the observed pseudogap. Our proposed scenario suggests that the different ground states, including superconductivity, are a consequence of the fluctuations associated with short range charge ordering which builds up close to the quantum phase transition.

scholarly journals Verwey-type charge ordering transition in an open-shell p -electron compound

2018 ◽  
Vol 4 (1) ◽  
pp. eaap7581 ◽  
Author(s):  
Peter Adler ◽  
Peter Jeglič ◽  
Manfred Reehuis ◽  
Matthias Geiß ◽  
Patrick Merz ◽  
...  
Keyword(s):  
Open Shell ◽  
Charge Ordering ◽  
Ordering Transition ◽  
Electron Compound

REENTRANT CHARGE ORDERING BEHAVIOUR IN THE EXTENDED HUBBARD MODEL

2001 ◽  
Vol 15 (26) ◽  
pp. 1217-1224 ◽  
Author(s):  
ANH TUAN HOANG
Keyword(s):  
Hubbard Model ◽  
Three Dimensional ◽  
Charge Ordering ◽  
Coherent Potential Approximation ◽  
Coulomb Energy ◽  
Extended Hubbard Model ◽  
Potential Approximation ◽  
Ordering Transition

We study the charge ordering behavior in a three-dimensional extended Hubbard model using the Coherent potential approximation (CPA). It is shown that the charge ordering transition occurs due to the competition between kinetic and Coulomb energy. At various band fillings a simple reentrant behavior of the charge ordering transition is found.

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