Data Sources and Citation Metrics
The 5th edition of the Research.com Best Materials Science Scientists in Iran, Islamic Republic Of Ranking is built upon comprehensive bibliometric data gathered principally from OpenAlex and CrossRef, complemented by multiple other reputable data sources. These platforms are widely recognized for aggregating extensive publication and citation records across disciplines, thereby ensuring a robust foundation for the ranking. The bibliometric data utilized to calculate the citation-based metrics were collected on January 12, 2026, providing a current and precise snapshot of research outputs and impact.
A scientist’s position in this ranking is determined according to their Discipline H-index, or D-index. Unlike a general H-index, the D-index specifically accounts for publications and citations strictly within the examined discipline—in this case, Materials Science—enabling a more focused and relevant assessment of scholarly influence.
Scope and Eligibility Criteria
The ranking process began with the examination of 279,971 scientist profiles identified through an array of bibliometric data sources, spanning all areas of research disciplines globally. Within this extensive dataset, 73 scientists were identified with a primary focus on Materials Science.
To qualify for inclusion in the ranking, a scientist’s D-index had to meet a minimum threshold of 40, with the additional requirement that the majority of their tier publications be situated within Materials Science. Beyond bibliometric indicators, scientists’ recognized awards and achievements within the field were also factored in to enhance the rigor and relevance of the list.
The D-index threshold itself is dynamically adjusted in increments of 10 based on the estimated total number of scholars within a given discipline, thereby ensuring that the ranking reliably represents the top 1% of leading researchers. Furthermore, to maintain disciplinary focus and consistency, candidates’ general H-index and their discipline-specific D-index were required to show a proximity of 30% or less, confirming alignment between overall research output and domain expertise.
Verification and Quality Assurance
Recognizing the limitations inherent in raw bibliometric data as an absolute measure of scholarly output, the Research.com team employed meticulous manual verification practices. All scientist profiles included in the ranking were carefully cross-correlated against publications indexed in a wide range of authoritative and trustworthy sources to validate accuracy and authenticity.
While the quantity of publications in leading journals and conference proceedings is not an explicit factor in determining ranking position, it is acknowledged as a valuable secondary indicator of a researcher’s contribution and standing within the Materials Science community.
The final ranking positions are based on researchers’ D-index values as derived from OpenAlex and CrossRef—two of the most prominent and widely trusted bibliometric databases accessible to the global research community. For a detailed explanation of the methodology, please refer to our methodology page.
Research.com’s Mission and Vision
The creation of this ranking aligns with Research.com’s overarching mission to inspire and inform the global scientific community, policymakers, and industry leaders. By providing a transparent and credible way to identify top experts in specific research areas, countries, and institutions, Research.com hopes to foster a deeper understanding of the scientific landscape.
Our goal is to catalyze collaboration, innovation, and informed decision-making by making visible where leading researchers are advancing knowledge, thereby supporting the broader ecosystem of academic excellence and research development worldwide.
