Citation Rankings
Highly Cited Researchers
Natural Sciences / Physics Highly Cited Researchers 24 Scientists Citation Rankings - 2025
Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
NanoScience and Nanotechnolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,869
3,672
0.467
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* Total Citation Counts Rankings
Ranking Based On Selection: 2
Nanoscience and Nanotechnology
Surface Science
Nanophosphors
Energy
Material Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,163
3,287
0.790
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Polymer Blends & Composites
Preparation and Characterization of Bio-based Polymer Composites
Green Synthesis of Nanomaterial'
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,825
2,438
0.637
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Physics Educatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,368
618
0.452
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Luminescence
Material Science
Nanotechnolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
976
618
0.633
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Computational Physics
Method of Finite Element
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
829
229
0.276
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Theoretical Nuclear Physics
Few-Body Physics
High-Energy Physics
Computational Physics
Inverse Scattering Theor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
357
264
0.739
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Nuclear Physics
Neutron Activation Analysis
Environmental Radioactivit
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
228
132
0.579
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Theoretical Physic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
150
104
0.693
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* Total Citation Counts Rankings
Ranking Based On Selection: 10
Few-body sytems
atomic and molecular physics
nuclear physics
Computational physic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
145
144
0.993
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Nanostructured materials synthesis via green process: Graphene/TMO composite
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
124
124
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Spectrally selective solar absorbers
Optical characterization
Green synthesis
Nanoparticles
Concentrated solar powe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
123
122
0.992
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Material Science
Condensed Matter Physic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37
37
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Condensed matter phyics
energy storage
supercapacito
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35
35
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Relativity
Education
Data scienc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28
19
0.679
* Total Citation Counts Rankings
Ranking Based On Selection: 16
plasma physics
group colorings
combinatorics
graph coloring
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22
19
0.864
* Total Citation Counts Rankings
Ranking Based On Selection: 17
general relativity
partial differential equations
black holes
gravitational wave
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21
20
0.952
* Total Citation Counts Rankings
Ranking Based On Selection: 18
physical science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13
3
0.231
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Physics
renewable energy
solar cell
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12
12
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 20
medical physic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12
12
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Physics
Environmental Science
Physics Educatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5
1
0.200
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Physic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4
4
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 23
theoretical physics
quantum physics
astophysic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2
0
0.000
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Physical Security
industrial safety and security
criminology and la
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1
0
0.000
* Total Citation Counts Rankings
Rankings
137,584
546
12
Ranking Based On Selection: 1
Sekhar Chandra Ray
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,869
3,672
0.467
* Total Citation Counts Rankings
Rankings
258,503
1,096
26
Ranking Based On Selection: 2
Simon Dhlamini
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,163
3,287
0.790
Nanoscience and Nanotechnology
Surface Science
Nanophosphors
Energy
Material Science
* Total Citation Counts Rankings
Rankings
278,481
1,207
30
Ranking Based On Selection: 3
K. Obi Reddy
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,825
2,438
0.637
Polymer Blends & Composites
Preparation and Characterization of Bio-based Polymer Composites
Green Synthesis of Nanomaterial'
* Total Citation Counts Rankings
Rankings
593,485
2,946
102
Ranking Based On Selection: 4
Jeanne Kriek
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,368
618
0.452
* Total Citation Counts Rankings
Rankings
714,638
3,654
141
Ranking Based On Selection: 5
Luyanda Lunga Noto
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
976
618
0.633
Luminescence
Material Science
Nanotechnolog
* Total Citation Counts Rankings
Rankings
773,119
4,006
161
Ranking Based On Selection: 6
Moritz Braun
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
829
229
0.276
Computational Physics
Method of Finite Element
* Total Citation Counts Rankings
Rankings
1,099,689
6,493
350
Ranking Based On Selection: 7
Mantile Leslie Lekala
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
357
264
0.739
Theoretical Nuclear Physics
Few-Body Physics
High-Energy Physics
Computational Physics
Inverse Scattering Theor
* Total Citation Counts Rankings
Rankings
1,304,965
395
4
Ranking Based On Selection: 8
Ibrahim Alfadil Alnour
International University of Africa
Khartoum, Sudan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
228
132
0.579
Nuclear Physics
Neutron Activation Analysis
Environmental Radioactivit
* Total Citation Counts Rankings
Rankings
1,521,162
9,999
667
Ranking Based On Selection: 9
Bahati Mukeru
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
150
104
0.693
* Total Citation Counts Rankings
Rankings
1,536,850
10,146
682
Ranking Based On Selection: 10
Morris Ramantswana
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
145
144
0.993
Few-body sytems
atomic and molecular physics
nuclear physics
Computational physic
Smart Institutional Plan
Powerful Insights + Smart Membership = Institutional Success
Unlock 360° Real-Time Institutional Analysis to identify your institution’s strengths and areas for improvement.
* Total Citation Counts Rankings
Rankings
1,616,045
10,749
749
Ranking Based On Selection: 11
Asratemedhin Bekele Habtemariam
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
124
124
1.000
Nanostructured materials synthesis via green process: Graphene/TMO composite
* Total Citation Counts Rankings
Rankings
1,620,809
10,774
752
Ranking Based On Selection: 12
Akoba Rashidah
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
123
122
0.992
Spectrally selective solar absorbers
Optical characterization
Green synthesis
Nanoparticles
Concentrated solar powe
* Total Citation Counts Rankings
Rankings
2,127,332
14,982
1,236
Ranking Based On Selection: 13
Elson Ganya
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37
37
1.000
* Total Citation Counts Rankings
Rankings
2,144,341
15,132
1,253
Ranking Based On Selection: 14
Yared Worku
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35
35
1.000
Condensed matter phyics
energy storage
supercapacito
* Total Citation Counts Rankings
Rankings
2,219,314
15,834
1,345
Ranking Based On Selection: 15
Jaroslaw Pawel Adamiak
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28
19
0.679
* Total Citation Counts Rankings
Rankings
2,284,096
16,454
1,413
Ranking Based On Selection: 16
Shivani Singh
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22
19
0.864
plasma physics
group colorings
combinatorics
graph coloring
* Total Citation Counts Rankings
Rankings
2,294,079
16,541
1,423
Ranking Based On Selection: 17
Vishnu Kakkat
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21
20
0.952
general relativity
partial differential equations
black holes
gravitational wave
* Total Citation Counts Rankings
Rankings
2,401,871
17,563
1,548
Ranking Based On Selection: 18
Tshepo Matseke
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13
3
0.231
* Total Citation Counts Rankings
Rankings
2,403,116
17,574
1,550
Ranking Based On Selection: 19
Pebetsi Thokwane
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12
12
1.000
* Total Citation Counts Rankings
Rankings
2,405,688
1,525
27
Ranking Based On Selection: 20
Mohammed Ali Haimid
International University of Africa
Khartoum, Sudan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12
12
1.000
* Total Citation Counts Rankings
Rankings
2,530,587
18,790
1,729
Ranking Based On Selection: 21
Marothi Phoku
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5
1
0.200
Physics
Environmental Science
Physics Educatio
* Total Citation Counts Rankings
Rankings
2,532,324
1,716
30
Ranking Based On Selection: 22
Abubakr Mahmoud Hamid
International University of Africa
Khartoum, Sudan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4
4
1.000
* Total Citation Counts Rankings
Rankings
2,594,106
19,450
1,847
Ranking Based On Selection: 23
Romeo D Matshaba
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2
0
0.000
theoretical physics
quantum physics
astophysic
* Total Citation Counts Rankings
Rankings
2,614,973
19,632
1,884
Ranking Based On Selection: 24
Isaac Komape
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1
0
0.000
Physical Security
industrial safety and security
criminology and la