The finite-size effect on the evolution of the Griffiths phase (GP) is studied using nanoparticles of half-doped manganite Pr0.5Sr0.5MnO3 with different average particle sizes but with similar structural parameters. All the samples exhibit pronounced GP behavior. With reducing the particle size, the Griffiths temperature remains almost unchanged but the characteristic critical temperature [Formula: see text] decreases and the GP properties are strengthened. It is noteworthy that the shift of [Formula: see text] follows finite-size scaling with the particle size revealing an exotic interplay between the GP properties and the sample dimension. This reinforces an earlier proposal of length-scale related evolution of GP.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1088/0953-8984/28/35/35LT02 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cooperation in the face of crisis: effect of demographic noise in collective-risk social dilemmas.
Math Biosci Eng
November 2024
Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, São Carlos 13560-970, SP, Brazil.
In deciding whether to contribute to a public good, people often face a social dilemma known as the tragedy of the commons: either bear the cost of promoting the collective welfare, or free-ride on the efforts of others. Here, we study the dynamics of cooperation in the context of the threshold public goods games, in which groups must reach a cumulative target contribution to prevent a potential disaster, such as an environmental crisis or social unrest, that could result in the loss of all private wealth. The catch is that the crisis may never materialize, and the investment in the public good is lost.
View Article and Find Full Text PDFMany-body localization in the age of classical computing.
Rep Prog Phys
November 2024
Marian Smoluchowski Institute of Physics, Jagiellonian University in Kraków, ul Lojasiewicza 11, Krakow, 31-007, POLAND.
Article Synopsis
- Statistical mechanics helps analyze large, complex systems with a few key parameters, but challenges arise in isolated quantum many-body systems when thermalization is hindered due to many-body localization (MBL).
- Research shows that even in strongly disordered systems, there is an ongoing drift towards ergodicity, which complicates understanding the MBL phase.
- The review emphasizes that while the dynamics slow down with increased disorder, it raises intriguing questions about why thermalization fails in disordered many-body systems, highlighting the need for more research in this area.
Size effect of accelerated seismic release from failures under compression in naturally fractured media.
Phys Rev E
October 2024
Department of Civil and Environmental Engineering, Western University, London, Canada.
It is crucial to understand the scaling behaviors of acoustic emissions (AEs) preceding damage localization in order to predict failures of brittle solids under compression. Yet, the effect of length scale on the complex interplay between the initiation, propagation, and coalescence of pre-existing fracture networks and corresponding AE behaviors is poorly understood. In this study, we perform laboratory compressional experiments on naturally fractured rocks at four sample sizes from 50 to 300 mm whose strength generally exhibits a finite-size effect.
View Article and Find Full Text PDFRevisiting institutional punishment in the N-person prisoner's dilemma.
Theory Biosci
November 2024
Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos São Paulo, 13560-970, Brazil.
Article Synopsis
- The conflict between individual and collective interests complicates cooperation in societies, requiring costly sanctioning institutions to enforce rules.
- Improvements to the N-person prisoner's dilemma, such as reducing overpunishment and requiring minimum contributions, can help manage these institutions better.
- In large communities, by imposing fines on non-contributors, a stable group of contributors can emerge, but in finite populations, random demographic changes can also influence the success of strategies that focus on public goods over sanctioning institutions.
Susceptible-Infectious-Susceptible Epidemic Model with Symmetrical Fluctuations: Equilibrium States and Stability Analyses for Finite Systems.
Acta Biotheor
November 2024
Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil.
Accurate prediction of epidemic evolution faces challenges such as understanding disease dynamics and inadequate epidemiological data. A recent approach faced these issues by modeling susceptible-infectious-susceptible (SIS) dynamics based on the first two statistical moments. Here, we improve this approach by including finite-size populations and analyzing the stability of the resulting model.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!