Stability of the high-density ferromagnetic ground state of a chargeless, magnetic-dipolar, quantum Fermi liquid

2007 ◽  
Vol 76 (6) ◽  
Author(s):  
S. D. Mahanti ◽  
Sudhanshu S. Jha
Keyword(s):  
Ground State ◽  
Fermi Liquid ◽  
High Density ◽  
Ferromagnetic Ground State

SUPPRESSION OF THE FERROMAGNETIC STATE BY DISORDER IN THE KONDO LATTICE

1992 ◽  
Vol 06 (21) ◽  
pp. 1329-1334 ◽  
Author(s):  
M. CRIŞAN ◽  
C. POPOVICIU
Keyword(s):  
Ground State ◽  
Fermi Liquid ◽  
Ferromagnetic State ◽  
Kondo Lattice ◽  
Spin Fluctuations ◽  
Low Concentration ◽  
Conduction Electrons ◽  
Ferromagnetic Ground State

The ferromagnetic ground state of a Kondo lattice with a low concentration of conduction electrons is ferromagnetic. Assuming the existence of disorder in the Fermi liquid of the conduction electrons we showed that the ferromagnetic state can be suppressed by the effect of the spin fluctuations of the disordered Fermi liquid.

High-pressure synthesis of the BaIrO3perovskite: A Pauli paramagnetic metal with a Fermi liquid ground state

2013 ◽  
Vol 88 (20) ◽  
Author(s):  
J.-G. Cheng ◽  
T. Ishii ◽  
H. Kojitani ◽  
K. Matsubayashi ◽  
A. Matsuo ◽  
...  
Keyword(s):  
High Pressure ◽  
Ground State ◽  
Fermi Liquid ◽  
High Pressure Synthesis ◽  
Paramagnetic Metal ◽  
Pressure Synthesis

scholarly journals Investigation of a Structural Phase Transition and Magnetic Structure of Na2BaFe(VO4)2: A Triangular Magnetic Lattice with a Ferromagnetic Ground State

2017 ◽  
Vol 56 (24) ◽  
pp. 14842-14849 ◽  
Author(s):  
Liurukara D. Sanjeewa ◽  
Vasile O. Garlea ◽  
Michael A. McGuire ◽  
Matthias Frontzek ◽  
Colin D. McMillen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetic Structure ◽  
Structural Phase Transition ◽  
Ground State ◽  
Structural Phase ◽  
Ferromagnetic Ground State

Plasma agriculture based on quantitative monitoring of reactions between fungal cells and atmospheric-pressure plasmas

2012 ◽  
Vol 1469 ◽  
Author(s):  
Masafumi Ito ◽  
Takayuki Ohta ◽  
Keigo Takeda
Keyword(s):  
Uv Radiation ◽  
Absorption Spectroscopy ◽  
Ground State ◽  
Atmospheric Pressure ◽  
Atomic Oxygen ◽  
Fungal Spores ◽  
Ultra Violet ◽  
High Density ◽  
Inactivation Rate ◽  
The Absolute

ABSTRACTA high-density non-equilibrium atmospheric pressure plasma (NEAPP) applied for inactivating fungal spores of P. digitatum is introduced as an environmentally safe and rapid-inactivation method. The contributions of ozone, ultra violet (UV) radiation and ground-state atomic oxygen in the NEAPP on the inactivation of the spores are evaluated using colony count method.The absolute densities of ozone were measured by using ultraviolet absorption spectroscopy. The ozone density increased from 2 to 8 ppm with an increase in the distance from the plasma source, while the inactivation rate decreased. The inactivation rate of plasma was evaluated to be thousand times higher than that of an ozone generator using the integrated number density of ozone. In addition, it was clarified that the contribution of UV radiation to inactivation was not dominant for P. digitatum inactivation by NEAPP by filtering the active species using quartz plate. From these results, we can speculate that the inactivation efficiency of reactive oxygen species (ROS) will be larger than those of others.In order to investigate the effect of ground-state atomic oxygen as one of ROS, the inactivation of P. digitatum spores using an oxygen radical source that employs a high-density atmospheric-pressure O2/Ar plasma. The absolute O density was measured to be 1.4×1014 and 1.5×1015 cm–3 using vacuum ultra violet absorption spectroscopy (VUVAS) using a microdischarge hollow cathode lamp. The behaviors of the O densities as a function of O2/(Ar+O2) mixture flow rate ratio correspond to that of the inactivation rate. This result indicates that ground-state atomic oxygen is concluded to be the dominant species that causes inactivation.

Coherent-incoherent crossover of charge dynamics in the ferromagnetic ground state of manganites:R0.6Sr0.4MnO3(R=La-Sm)

1999 ◽  
Vol 60 (14) ◽  
pp. 10362-10366 ◽  
Author(s):  
E. Saitoh ◽  
Y. Okimoto ◽  
Y. Tomioka ◽  
T. Katsufuji ◽  
Y. Tokura
Keyword(s):  
Ground State ◽  
Charge Dynamics ◽  
Ferromagnetic Ground State

scholarly journals GGA/PBE study of the spin isomers of Fe34,40, Co23,34, and Co12Cu Clusters with Selected Geometries

2017 ◽  
Vol 56 (3) ◽  
Author(s):  
Faustino Aguilera-Granja ◽  
Andrés Vega ◽  
Luis Carlos Balbás
Keyword(s):  
Ground State ◽  
Density Functional ◽  
Energy Difference ◽  
Many Body ◽  
Generalized Gradient ◽  
Structural Isomers ◽  
Functional Theory ◽  
Ferromagnetic Ground State ◽  
Spin Isomers ◽  
Pseudo Potential

In a recent beam deflecting experiment was found that high and low spin states of pure Fe<sub>n</sub> and Co<sub>n</sub> clusters with <em>n</em> ≤ 300 atoms coexist at cryogenic temperatures. In this work we have studied the high spin (HS) and low spin (LS) states of several structural isomers of Co<sub>23</sub>, Co<sub>34</sub>, Fe<sub>34</sub>, and Fe<sub>40</sub> using the generalized gradient approximation (GGA) to density functional theory as implemented in the first-principles pseudo-potential code SIESTA. The calculated energy difference between these HS and LS isomers is not consistent with the observed coexistence, which can be due to an insufficient account of many body correlation effects in the GGA description, or to unknown isomer structures of these clusters. We have calculated within the same tools the magnetic isomers of Co<sub>12</sub>Cu cluster aimed to re-visit a former DFT prediction of an anti-ferromagnetic ground state. We find, however, a ferromagnetic ground state as expected on physical grounds. Our results exemplify the difficulties of the current DFT approaches to describe the magnetic properties of transition metal systems.

Ground state of high-density matter at finite temperature

1989 ◽  
Vol 231 (4) ◽  
pp. 444-448 ◽  
Author(s):  
Esteban Roulet ◽  
Daniele Tommasini
Keyword(s):  
Ground State ◽  
Finite Temperature ◽  
High Density ◽  
Density Matter
Sign in / Sign up

Export Citation Format

Share Document