Information-theoretic model of self-organizing fullerenes and the emergence of C60

Ahmad, Shoaib

doi:10.1016/j.cplett.2018.10.024

Cited by 5 publications

(3 citation statements)

References 28 publications

(72 reference statements)

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“…Furthermore, there exists an infinite number of possible variations, ranging from the most common to the most exotic, which makes the fullerene family exceptionally diverse and rich in various structural arrangements. [11][12][13][14][15][16][17][18][19]. The fullerenes have been discovered for the first time in 1985.…”

Section: Introductionmentioning

confidence: 99%

Magnetization Plateaus of a Double Fullerene Core/Shell Like-Nanostructure in an External Magnetic Field: Monte Carlo Study

2023

JJP

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This paper concerns the investigation of the critical (HC) and the saturation (HS) magnetic fields behavior of the studied system as a function of different physical parameters. The Monte Carlo method is used to study the magnetic properties of the ferrimagnetic behavior of a double fullerene X60 core/shell-like nanostructure. Based on the Ising model, we focus our study on a system formed by a double sphere core/shell. The two spheres contain the spins  = ± 1/2 in the core surrounded by the spin S = ± 1, 0 in the shell. Various types of magnetization curves have been established, depending on the competition among the exchange couplings, the crystal fields, and the temperature. The study reveals that the saturation magnetic field (Hs) is significantly influenced by variations in all exchange coupling parameters, whereas the critical magnetic field (Hc) is only mildly affected by these parameter variations. Moreover, the crystal field and temperature both influence the critical and saturation magnetic fields. Keywords: Double fullerene core/shell-like structure, Magnetization plateaus, Monte Carlo simulations, Critical and saturation fields, External magnetic field.

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Section: Introductionmentioning

confidence: 99%

Magnetization Plateaus of a Double Fullerene Core/Shell Like-Nanostructure in an External Magnetic Field: Monte Carlo Study

2023

JJP

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“…Large parts of the Indian subcontinent receive rainfall from June to September known as Indian summer monsoon rainfall (ISMR). ISMR contributes about 70 %-90 % to the total annual precipitation amount in the Indian subcontinent (Shukla and Haung, 2016). Agriculture in the Indian subcontinent depends substantially on ISMR, and any variations in the interannual and intraseasonal variabilities of ISMR cause a significant impact on the country's economy.…”

Section: Introductionmentioning

confidence: 99%

“…Shannon (1948) introduced the concept of information entropy, which quantifies the average uncertainty of a given random variable. Recently, various methods from information theory have been widely used in the fields of Earth system sciences (Bennett et al, 2019;Gerken et al, 2019;Jiang and Kumar, 2019;Ruddel et al, 2019), climate sciences (Nowack et al, 2020;Runge et al, 2019;Joshua et al, 2019;Campuzano et al, 2018;Bhaskar et al, 2017), and other interdisciplinary sciences (Wibral et al, 2017;Leonardo et al, 2019;Shoaib, 2018). This section comprises the basic concepts of information theory along with a brief introduction of various estimators.…”

Section: Introductionmentioning

confidence: 99%

The synergistic impact of ENSO and IOD on Indian summer monsoon rainfall in observations and climate simulations – an information theory perspective

et al. 2020

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Abstract. The El Niño–Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) are two well-known temporal oscillations in sea surface temperature (SST), which are both thought to influence the interannual variability of Indian summer monsoon rainfall (ISMR). Until now, there has been no measure to assess the simultaneous information exchange (IE) from both ENSO and IOD to ISMR. This study explores the information exchange from two source variables (ENSO and IOD) to one target (ISMR). First, in order to illustrate the concepts and quantification of two-source IE to a target, we use idealized test cases consisting of linear and nonlinear dynamical systems. Our results show that these systems exhibit net synergy (i.e., the combined influence of two sources on a target is greater than the sum of their individual contributions), even with uncorrelated sources in both the linear and nonlinear systems. We test IE quantification with various estimators (linear, kernel, and Kraskov estimators) for robustness. Next, the two-source IE from ENSO and IOD to ISMR is investigated in observations, reanalysis, three global climate model (GCM) simulations, and three nested higher-resolution simulations using a regional climate model (RCM). This (1) quantifies IE from ENSO and IOD to ISMR in the natural system and (2) applies IE in the evaluation of the GCM and RCM simulations. The results show that both ENSO and IOD contribute to ISMR interannual variability. Interestingly, significant net synergy is noted in the central parts of the Indian subcontinent, which is India's monsoon core region. This indicates that both ENSO and IOD are synergistic predictors in the monsoon core region. But, they share significant net redundant information in the southern part of the Indian subcontinent. The IE patterns in the GCM simulations differ substantially from the patterns derived from observations and reanalyses. Only one nested RCM simulation IE pattern adds value to the corresponding GCM simulation pattern. Only in this case does the GCM simulation show realistic SST patterns and moisture transport during the various ENSO and IOD phases. This confirms, once again, the importance of the choice of GCM in driving a higher-resolution RCM. This study shows that two-source IE is a useful metric that helps in better understanding the climate system and in process-oriented climate model evaluation.

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Experimental and Theoretical Aspects of the Fragmentation of Carbon’s Single- and Multiwalled Nanotubes

Javeed

Ahmad

2022

Handbook of Carbon Nanotubes

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Information-theoretic model of self-organizing fullerenes and the emergence of C60

Cited by 5 publications

References 28 publications

Magnetization Plateaus of a Double Fullerene Core/Shell Like-Nanostructure in an External Magnetic Field: Monte Carlo Study

Magnetization Plateaus of a Double Fullerene Core/Shell Like-Nanostructure in an External Magnetic Field: Monte Carlo Study

The synergistic impact of ENSO and IOD on Indian summer monsoon rainfall in observations and climate simulations – an information theory perspective

Experimental and Theoretical Aspects of the Fragmentation of Carbon’s Single- and Multiwalled Nanotubes

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