ChemInform Abstract: Non-Fermi-Liquid Behavior and Magnetic Fluctuations at the Quantum Phase Transition in CeCu6-xAux.

ChemInform ◽  
2010 ◽  
Vol 33 (20) ◽  
pp. no-no
Author(s):  
H. von Lohneysen ◽  
C. Pfleiderer ◽  
A. Schroder ◽  
O. Stockert
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Fermi Liquid ◽  
Quantum Phase ◽  
Magnetic Fluctuations ◽  
Liquid Behavior ◽  
Fermi Liquid Behavior

scholarly journals Hidden non-Fermi liquid behavior caused by magnetic phase transition in Ni-doped Ba-122 pnictides

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Seokbae Lee ◽  
Ki-Young Choi ◽  
Eilho Jung ◽  
Seulki Roh ◽  
Soohyeon Shin ◽  
...  
Keyword(s):  
Phase Transition ◽  
Temperature Dependence ◽  
Magnetic Phase Transition ◽  
Fermi Liquid ◽  
Magnetic Phase ◽  
Linear Temperature Dependence ◽  
Scattering Rate ◽  
Underdoped Sample ◽  
Liquid Behavior ◽  
Fermi Liquid Behavior

Abstract We studied two BaFe2−x Ni x As2 (Ni-doped Ba-122) single crystals at two different doping levels (underdoped and optimally doped) using an optical spectroscopic technique. The underdoped sample shows a magnetic phase transition around 80 K. We analyze the data with a Drude-Lorentz model with two Drude components (D1 and D2). It is known that the narrow D1 component originates from electron carriers in the electron-pockets and the broad D2 mode is from hole carriers in the hole-pockets. While the plasma frequencies of both Drude components and the static scattering rate of the broad D2 component show negligible temperature dependencies, the static scattering rate of the D1 mode shows strong temperature dependence for the both samples. We observed a hidden quasi-linear temperature dependence in the scattering rate of the D1 mode above and below the magnetic transition temperature while in the optimally doped sample the scattering rate shows a more quadratic temperature dependence. The hidden non-Fermi liquid behavior in the underdoped sample seems to be related to the magnetic phase of the material.

Observation of Longitudinal Magnetic Fluctuations at a First-Order Ferromagnetic Quantum Phase Transition in UGe2

2021 ◽  
Vol 90 (7) ◽  
pp. 073707
Author(s):  
Yuichiro Noma ◽  
Hisashi Kotegawa ◽  
Tetsuro Kubo ◽  
Hideki Tou ◽  
Hisatomo Harima ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
Magnetic Fluctuations ◽  
First Order

scholarly journals Scaling of Magnetic Fluctuations near a Quantum Phase Transition

1998 ◽  
Vol 80 (25) ◽  
pp. 5623-5626 ◽  
Author(s):  
A. Schröder ◽  
G. Aeppli ◽  
E. Bucher ◽  
R. Ramazashvili ◽  
P. Coleman
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
Magnetic Fluctuations
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