scholarly journals Cluster-glass dynamics of the Griffiths phase in Tb5−xLaxSi2Ge2

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
N. Marcano ◽  
P. A. Algarabel ◽  
L. Fernández Barquín ◽  
J. P. Araujo ◽  
A. M. Pereira ◽  
...  
Keyword(s):  
Griffiths Phase ◽  
Glass Dynamics

THE DYNAMICS OF DISORDERED MAGNETS IN THE GRIFFITHS PHASE, INVESTIGATED BY NEUTRON SCATTERING

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-1047-C8-1048
Author(s):  
R. G. Lloyd ◽  
P. W. Mitchell ◽  
R. C. C. Ward ◽  
M. Cherrill
Keyword(s):  
Neutron Scattering ◽  
Griffiths Phase ◽  
Disordered Magnets

scholarly journals Temperature chaos is present in off-equilibrium spin-glass dynamics

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Marco Baity-Jesi ◽  
Enrico Calore ◽  
Andrés Cruz ◽  
Luis Antonio Fernandez ◽  
José Miguel Gil-Narvion ◽  
...  
Keyword(s):  
Spin Glass ◽  
Dynamic Effect ◽  
Large Degree ◽  
Equilibrium Temperature ◽  
Experimental Conditions ◽  
Temperature Changes ◽  
Equilibrium Dynamics ◽  
Glass Dynamics ◽  
Extreme Sensitivity ◽  
Non Equilibrium

AbstractExperiments featuring non-equilibrium glassy dynamics under temperature changes still await interpretation. There is a widespread feeling that temperature chaos (an extreme sensitivity of the glass to temperature changes) should play a major role but, up to now, this phenomenon has been investigated solely under equilibrium conditions. In fact, the very existence of a chaotic effect in the non-equilibrium dynamics is yet to be established. In this article, we tackle this problem through a large simulation of the 3D Edwards-Anderson model, carried out on the Janus II supercomputer. We find a dynamic effect that closely parallels equilibrium temperature chaos. This dynamic temperature-chaos effect is spatially heterogeneous to a large degree and turns out to be controlled by the spin-glass coherence length ξ. Indeed, an emerging length-scale ξ* rules the crossover from weak (at ξ ≪ ξ*) to strong chaos (ξ ≫ ξ*). Extrapolations of ξ* to relevant experimental conditions are provided.

scholarly journals Epidemic growth and Griffiths effects on an emergent network of excited atoms

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
T. M. Wintermantel ◽  
M. Buchhold ◽  
S. Shevate ◽  
M. Morgado ◽  
Y. Wang ◽  
...  
Keyword(s):  
Complex Systems ◽  
Power Laws ◽  
Excitation Density ◽  
Griffiths Phase ◽  
Many Body ◽  
Excited Atoms ◽  
Equilibrium Dynamics ◽  
Many Body Systems ◽  
Excitation Number ◽  
Non Equilibrium

AbstractWhether it be physical, biological or social processes, complex systems exhibit dynamics that are exceedingly difficult to understand or predict from underlying principles. Here we report a striking correspondence between the excitation dynamics of a laser driven gas of Rydberg atoms and the spreading of diseases, which in turn opens up a controllable platform for studying non-equilibrium dynamics on complex networks. The competition between facilitated excitation and spontaneous decay results in sub-exponential growth of the excitation number, which is empirically observed in real epidemics. Based on this we develop a quantitative microscopic susceptible-infected-susceptible model which links the growth and final excitation density to the dynamics of an emergent heterogeneous network and rare active region effects associated to an extended Griffiths phase. This provides physical insights into the nature of non-equilibrium criticality in driven many-body systems and the mechanisms leading to non-universal power-laws in the dynamics of complex systems.

Spin-glass dynamics

1998 ◽  
Vol 177-181 ◽  
pp. 63-66 ◽  
Author(s):  
I.A. Campbell ◽  
J. Hammann ◽  
H. Kawamura ◽  
R.H. McKenzie ◽  
P. Nordblad ◽  
...  
Keyword(s):  
Spin Glass ◽  
Glass Dynamics

?SR and other microscopic probes of spin-glass dynamics

1981 ◽  
Vol 8 (4-6) ◽  
pp. 749-756 ◽  
Author(s):  
D. E. MacLaughlin
Keyword(s):  
Spin Glass ◽  
Glass Dynamics

Diffused metal-insulator transition in NdNiO3 film grown on BaTiO3 : Likely evidence of electronic Griffiths phase

2021 ◽  
Vol 5 (8) ◽  
Author(s):  
Parushottam Majhi ◽  
Sudipta Chatterjee ◽  
Ravindra Singh Bisht ◽  
V. Raghavendra Reddy ◽  
Barnali Ghosh ◽  
...  
Keyword(s):  
Insulator Transition ◽  
Griffiths Phase ◽  
Metal Insulator Transition ◽  
Metal Insulator

scholarly journals Griffiths phase of the Kondo insulator fixed point

2001 ◽  
Vol 226-230 ◽  
pp. 110-114 ◽  
Author(s):  
E. Miranda ◽  
V. Dobrosavljević
Keyword(s):  
Fixed Point ◽  
Griffiths Phase ◽  
Kondo Insulator

Exchange bias effect and Griffiths phase coexistence in the disordered cobaltite Gd0.5Sr0.5CoO3−δ

2018 ◽  
Vol 98 (21) ◽  
Author(s):  
I. Fita ◽  
I. O. Troyanchuk ◽  
T. Zajarniuk ◽  
P. Iwanowski ◽  
A. Wisniewski ◽  
...  
Keyword(s):  
Exchange Bias ◽  
Phase Coexistence ◽  
Griffiths Phase ◽  
Bias Effect ◽  
Exchange Bias Effect

Observation of the Griffiths phase in the ternary nitrides Sn1−xNFe3+x

2020 ◽  
Vol 102 (23) ◽  
Author(s):  
Chaocheng Liu ◽  
Xucai Kan ◽  
Bosen Wang ◽  
Xiansong Liu
Keyword(s):  
Griffiths Phase
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