scholarly journals Two types of the effective mass divergence and the Grüneisen ratio in heavy-fermion metals

2004 ◽  
Vol 320 (5-6) ◽  
pp. 459-464 ◽  
Author(s):  
M.Ya. Amusia ◽  
A.Z. Msezane ◽  
V.R. Shaginyan
Keyword(s):  
Effective Mass ◽  
Heavy Fermion ◽  
Mass Divergence

ChemInform Abstract: Convergence of the Enhancement of the Effective Mass under Pressure and Magnetic Field in Heavy-Fermion Compounds: CeRu2Si2, CeRh2Si2, and CeIn3

ChemInform ◽  
2011 ◽  
Vol 42 (6) ◽  
pp. no-no
Author(s):  
J. Flouquet ◽  
D. Aoki ◽  
W. Knafo ◽  
G. Knebel ◽  
T. D. Matsuda ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Effective Mass ◽  
Heavy Fermion

scholarly journals Convergence of the Enhancement of the Effective Mass Under Pressure and Magnetic Field in Heavy-Fermion Compounds: CeRu2Si2, CeRh2Si2, and CeIn3

2010 ◽  
Vol 161 (1-2) ◽  
pp. 83-97 ◽  
Author(s):  
J. Flouquet ◽  
D. Aoki ◽  
W. Knafo ◽  
G. Knebel ◽  
T. D. Matsuda ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Effective Mass ◽  
Heavy Fermion

INFLUENCE OF ELECTRON–PHONON INTERACTION ON EFFECTIVE MASS IN SOME HEAVY FERMION (HF) SYSTEMS

2008 ◽  
Vol 22 (04) ◽  
pp. 365-379 ◽  
Author(s):  
S. MOHANTY ◽  
B. K. KALTA ◽  
P. NAYAK
Keyword(s):  
Effective Mass ◽  
Coupling Strength ◽  
Heavy Fermion ◽  
Simple Expression ◽  
Model Parameters ◽  
Coupling Mechanism ◽  
Phonon Coupling ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Electron Phonon Coupling

It is a fact that for ordinary metals, the electron–phonon interaction increases the quasi-particle mass, which is in contrast to the finding by Fulde et al. that, for some heavy Fermion (HF) systems, it decreases. Some experiments on HF systems suggest that there exists a strong coupling of the elastic degrees of freedom with these at the electronic and magnetic ones. To understand the effect of electron–phonon interaction on effective mass, the electron–phonon coupling mechanism in the framework of the periodic Anderson model is considered, and a simple expression is derived. This involves various model parameters namely, the position of the 4f level; the effective coupling strength, g, temperature, b; and the electron–phonon coupling strength, r. The influence of these parameters on the value of effective mass is studied, and interesting results were found. For simplicity, the numerical calculation is performed in the long wavelength limit.

Orbital crossing in spin-split Fermi surfaces and anisotropic effective mass of the noncentrosymmetric heavy-fermion paramagnet UPt5

2020 ◽  
Vol 102 (12) ◽  
Author(s):  
Yoshiki J. Sato ◽  
Hisatomo Harima ◽  
Ai Nakamura ◽  
Arvind Maurya ◽  
Yusei Shimizu ◽  
...  
Keyword(s):  
Effective Mass ◽  
Heavy Fermion ◽  
Fermi Surfaces ◽  
Orbital Crossing

ChemInform Abstract: Convergence of the Enhancement of the Effective Mass Under Pressure and Magnetic Field in Heavy-Fermion Compounds: CeRu2Si2, CeRh2Si2, and CeIn3

ChemInform ◽  
2011 ◽  
Vol 42 (18) ◽  
pp. no-no
Author(s):  
J. Flouquet ◽  
D. Aoki ◽  
W. Knafo ◽  
G. Knebel ◽  
T. D. Matsuda ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Effective Mass ◽  
Heavy Fermion

Effective mass divergence in the infinite-U Hubbard model

2006 ◽  
Vol 378-380 ◽  
pp. 323-324 ◽  
Author(s):  
Takashi Koretsune ◽  
Masao Ogata
Keyword(s):  
Hubbard Model ◽  
Effective Mass ◽  
Mass Divergence

Effective mass enhancement in B site Fe doping heavy fermion compound CaCu3Ru4O12

2015 ◽  
Vol 222 ◽  
pp. 49-52 ◽  
Author(s):  
Rongjuan Wang ◽  
Yuanyuan Zhu ◽  
Li Wang ◽  
Yong Liu ◽  
Jing Shi ◽  
...  
Keyword(s):  
Effective Mass ◽  
Heavy Fermion ◽  
Fe Doping ◽  
Heavy Fermion Compound ◽  
Mass Enhancement

PROXIMITY EFFECT OF Pb ON CeCu6 AND La0.05Ce0.95Cu6

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3642-3649
Author(s):  
TAR-PIN CHEN ◽  
UDOM TIPPARACHI ◽  
H. D. YANG ◽  
J. T. WANG ◽  
BENJAMIN CHEN ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Effective Mass ◽  
Proximity Effect ◽  
Heavy Fermion ◽  
Unusual Behavior ◽  
Pairing State ◽  
Heavy Fermion Materials ◽  
The Difference

Heavy fermion materials have attracted a great deal of attention since 1979. These materials which contain a rare earth (U, or Ce, etc.) element exhibit unusual behavior at low temperature. The effective mass m* of the Landau quasiparticles is found to be orders of magnitude higher than that of a bare electron. Some of the Heavy Fermion materials become superconductors at low temperature. The pairing of electrons in these superconductors may not be of s symmetry like those in BCS type superconductors. The mismatch in electronic mass and the difference in pairing state between the light conventional superconducting electrons and the heavy fermion electrons have brought the coupling between light electrons (BCS type) and the heavy fermion electrons into question. Proximity effect of Pb on CeCu 6, Pb on La 0.05 Ce 0.95 Cu 6, and Pb on Cu was used to investigate the coupling between the conventional superconducting electrons of Pb and the heavy electrons in CeCu 6 or La 0.05 Ce 0.95 Cu 6. In this experiment proximity effect was found between Pb and CeCu 6, as well as between Pb and La 0.05 Ce 0.95 Cu 6. However, the proximity effect is small when compare with that between Pb and Cu. This indicates a much shorter extrapolation length in the heavy fermion materials than in Cu. Such a phenomenon can be explained by the mismatch in effective mass between the superconducting Pb electrons and the heavy fermion electrons.

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