scholarly journals A simple model for magnetism in itinerant electron systems

2007 ◽  
Vol 375 (1) ◽  
pp. 221-226
Author(s):  
Andre M.C. Souza
Keyword(s):  
Simple Model ◽  
Itinerant Electron ◽  
Electron Systems

scholarly journals Direct visualization of coexisting channels of interaction in CeSb

2019 ◽  
Vol 5 (3) ◽  
pp. eaat7158 ◽  
Author(s):  
Sooyoung Jang ◽  
Robert Kealhofer ◽  
Caolan John ◽  
Spencer Doyle ◽  
Ji-Sook Hong ◽  
...  
Keyword(s):  
Heavy Fermion ◽  
Real Space ◽  
Photoemission Spectroscopy ◽  
Itinerant Electron ◽  
Electron Systems ◽  
Direct Visualization ◽  
Correlated Electron Systems ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Correlated Electron ◽  
Modes Of Interaction

Our understanding of correlated electron systems is vexed by the complexity of their interactions. Heavy fermion compounds are archetypal examples of this physics, leading to exotic properties that weave magnetism, superconductivity and strange metal behavior together. The Kondo semimetal CeSb is an unusual example where different channels of interaction not only coexist, but have coincident physical signatures, leading to decades of debate about the microscopic picture describing the interactions between the f moments and the itinerant electron sea. Using angle-resolved photoemission spectroscopy, we resonantly enhance the response of the Ce f electrons across the magnetic transitions of CeSb and find there are two distinct modes of interaction that are simultaneously active, but on different kinds of carriers. This study reveals how correlated systems can reconcile the coexistence of different modes on interaction—by separating their action in momentum space, they allow their coexistence in real space.

Magnetic properties of some itinerant-electron systems atT>0

1990 ◽  
Vol 65 (12) ◽  
pp. 1470-1473 ◽  
Author(s):  
Michael Aizenman ◽  
Elliott H. Lieb
Keyword(s):  
Magnetic Properties ◽  
Itinerant Electron ◽  
Electron Systems

Auger Resonant Raman Scattering in Itinerant Electron Systems: Continuum Excitation in Cu

2001 ◽  
Vol 88 (2) ◽  
Author(s):  
A. Föhlisch ◽  
O. Karis ◽  
M. Weinelt ◽  
J. Hasselström ◽  
A. Nilsson ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Itinerant Electron ◽  
Electron Systems ◽  
Resonant Raman ◽  
Resonant Raman Scattering

MAGNETIC PHASE TRANSITIONS IN Ce(Fe1–xCox)2 SYSTEM

1993 ◽  
Vol 07 (01n03) ◽  
pp. 822-825 ◽  
Author(s):  
NAUSHAD ALI ◽  
XIANFENG ZHANG
Keyword(s):  
Phase Transitions ◽  
Magnetic Phase ◽  
Ac Susceptibility ◽  
Magnetic Phase Diagram ◽  
Ferromagnetic State ◽  
Magnetic Phase Transitions ◽  
Itinerant Electron ◽  
Electron Systems ◽  
First Order ◽  
First Order Transition

Re-entrant magnetic phase transitions in Ce(Fe1–xMx)2 systems (where M=Al, Ru, Co, etc.) are being investigated by various research groups. It has been observed that the system goes from a paramagnetic to ferromagnetic state followed by an almost complete loss of magnetization as the temperature is lowered. We have done systematic experimental measurements of magnetization, ac susceptibility, electrical resistivity, and thermal expansion on the Ce(Fe1–xCox)2 system. It is found that as the temperature is decreased, the system goes from para- to ferro- to antiferro-magnetic phase. The ferro- to antiferro-magnetic phase transition is a first order transition. Our experimental results are consistent with the magnetic phase diagram predictions by Moriya and Usami's theory of strongly interacting itinerant electron systems.

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