Data Sources and Citation Metrics
The 5th edition of the Research.com Best Materials Science Scientists in New Zealand Ranking is primarily informed by comprehensive bibliometric data obtained from OpenAlex and CrossRef, supplemented by multiple other reputable data sources. These platforms provide extensive and up-to-date records of scholarly publications and citation metrics across disciplines worldwide. The bibliometric data used to devise the citation-based metrics for this ranking were collected on January 12, 2026. A scientist’s position in the ranking is determined by their D-index (Discipline H-index), a refined metric that considers only the publications and citations relevant to the specific discipline under examination, ensuring the evaluation is discipline-focused and pertinent.
Scope of Research and Qualification Criteria
This ranking is based on a thorough examination of 279,971 scientist profiles identified through a diverse array of bibliometric data sources, cutting across all scientific disciplines. Specifically, 12 scientists specializing in Materials Science in New Zealand were assessed. To qualify for inclusion in the ranking, a scientist must have a D-index of at least 40, reflecting a sustained and significant impact within the field. Additionally, the majority of their tier publications must be centered on Materials Science to ensure disciplinary consistency. Awards and notable achievements in the field further contributed to the evaluation.
The threshold for the D-index is adjusted in increments of 10 according to the estimated total number of scholars within each discipline, with the overarching goal of guaranteeing representation of the top 1% of leading researchers. Furthermore, to ensure alignment between general and discipline-specific impact, a proximity criterion is applied whereby the difference between a scientist’s general H-index and their D-index is maintained at 30% or less.
Additional Verification Practices
Recognizing that raw bibliometric data alone do not provide a definitive measure of scholarly output, the research team has implemented meticulous manual verification processes. All scientist profiles included in the ranking have been cross-correlated with publications and achievements verified across a broad spectrum of trustworthy and authoritative sources. While the quantity of papers published in prominent journals and conference proceedings does not directly influence the ranking position, it serves as a valuable secondary indicator of a researcher’s contribution to the Materials Science domain.
The final ranking positions are established using each researcher’s D-index, strictly derived from data obtained from OpenAlex and CrossRef, which are among the most prominent and widely recognized bibliometric databases accessible to the global research community. For a detailed explanation of the methodology applied, readers are encouraged to visit our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission is to inspire researchers, companies, and policymakers worldwide to explore and understand the trajectories of leading experts in various fields. This ranking serves as a transparent and reliable means for the global scientific community to identify and benchmark the preeminent scientists in specific areas of study, within countries such as New Zealand, and even at the level of individual research institutions. Through this meticulous and carefully curated compilation, we seek to foster collaboration, inform strategy, and promote excellence in scientific research.
