J. R. Simpson

3.2k citations

35 papers · 2.7k indexed · 1 hit paper · h-index 23

Materials Chemistry top 5%
Electronic, Optical and Magnetic Materials top 5%
Electrical and Electronic Engineering top 10%
Soil Science top 2%
Condensed Matter Physics top 5%

Co-authors: J. R. Freney O. T. Denmead T. Venkatesan H. D. Drew S. R. Shinde R. Leuning Satishchandra Ogale R. L. Greene
Topics: Magnetic and transport properties of perovskites and related materials (7 papers)Soil and Water Nutrient Dynamics (6 papers)Electronic and Structural Properties of Oxides (6 papers)
Cited by: Electronic, Optical and Magnetic Materials Soil Science Process Chemistry and Technology
Journals: Nature Physical Review Letters Physical review. B, Condensed matter
Partner nations: Australia United States China

In The Last Decade

J. R. Simpson

34 papers receiving 2.5k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

High Temperature Ferromagnetism with a Giant Magnetic Moment in Transparent Co-dopedSnO2−δ

2003 770 citations Satishchandra Ogale, R. J. Choudhary et al. Physical Review Letters profile →

Peers

Countries citing papers authored by J. R. Simpson

Since Specialization

Citations

This map shows the geographic impact of J. R. Simpson's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by J. R. Simpson with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J. R. Simpson more than expected).

Fields of papers citing papers by J. R. Simpson

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J. R. Simpson. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by J. R. Simpson. The network helps show where J. R. Simpson may publish in the future.

Co-authorship network of co-authors of J. R. Simpson

This figure shows the co-authorship network connecting the top 25 collaborators of J. R. Simpson. A scholar is included among the top collaborators of J. R. Simpson based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with J. R. Simpson. J. R. Simpson is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Enhancing single-wall carbon nanotube properties through controlled endohedral filling 2016 ·Nanoscale Horizons ·Jochen Campo,Yanmei Piao,Stephanie Lam,Christopher M. Stafford,Jason K. Streit,J. R. Simpson,Angela R. Hight Walker,Jeffrey Fagan	46
2	The effect of dispersant on defects in length-separated single-wall carbon nanotubes measured by Raman spectroscopy 2009 ·Carbon ·J. R. Simpson,Jeffrey Fagan,Matthew L. Becker,Erik K. Hobbie,Angela R. Hight Walker	24
3	Origin of the exceptional negative thermal expansion in metal-organic framework-5Zn4O(1,4−benzenedicarboxylate)3 2008 ·Physical Review B ·Wei Zhou,Hui Wu,Taner Yildirim,J. R. Simpson,Angela R. Hight Walker	132
4	Dielectric Response of Aligned Semiconducting Single-Wall Nanotubes 2007 ·Physical Review Letters ·Jeffrey Fagan,J. R. Simpson,Brian J. Landi,Lee J. Richter,(unknown),Vardhan Bajpai,Derek Ho,Ryne P. Raffaelle,Angela R. Hight Walker,Barry J. Bauer,Erik K. Hobbie	72
5	Comparative Measures of Single-Wall Carbon Nanotube Dispersion 2006 ·The Journal of Physical Chemistry B ·Jeffrey Fagan,Brian J. Landi,(unknown),J. R. Simpson,Vardhan Bajpai,Barry J. Bauer,Kalman B. Migler,Angela R. Hight Walker,Ryne P. Raffaelle,Erik K. Hobbie	77
6	Optical band-edge shift of anataseTi1−xCoxO2−δ 2004 ·Physical Review B ·J. R. Simpson,H. D. Drew,S. R. Shinde,R. J. Choudhary,Satishchandra Ogale,T. Venkatesan	34
7	High Temperature Ferromagnetism with a Giant Magnetic Moment in Transparent Co-dopedSnO2−δbreakdown → 2003 ·Physical Review Letters ·Satishchandra Ogale,R. J. Choudhary,J. P. Buban,S. E. Lofland,S. R. Shinde,S. N. Kale,V. N. Kulkarni,J. S. Higgins,C. Lanci,J. R. Simpson,Nigel D. Browning,S. Das Sarma,H. D. Drew,R. L. Greene,T. Venkatesan	770
8	Exchange Interaction Effects on the Optical Properties ofLuMnO3 2003 ·Physical Review Letters ·(unknown),J. R. Simpson,M. Quijada,Hiroki Ishibashi,N. Hur,J. S. Ahn,S.-W. Cheong,Andrew J. Millis,H. D. Drew	119
9	Midinfrared Hall effect in thin-film metals: Probing the Fermi surface anisotropy in Au and Cu 2000 ·Physical review. B, Condensed matter ·J. Černe,D. C. Schmadel,M. Grayson,Gregory S. Jenkins,J. R. Simpson,H. D. Drew	22
10	Temperature-dependent scattering rate and optical mass of ferromagnetic metallic manganites 1999 ·Physical review. B, Condensed matter ·J. R. Simpson,H. D. Drew,V. N. Smolyaninova,R. L. Greene,M. C. Robson,Amlan Biswas,M. Rajeswari	33
11	Optical Conductivity of Manganites: Crossover from Jahn-Teller Small Polaron to Coherent Transport in the Ferromagnetic State 1998 ·arXiv (Cornell University) ·M. Quijada,(unknown),J. R. Simpson,H. D. Drew,K. H. Ahn,Andrew J. Millis,R. Shreekala,R. Ramesh,M. Rajeswari,T. Venkatesan	6
12	Shade trees as a demand-side resource 1995 ·Greg McPherson,J. R. Simpson	19
13	Control of gaseous nitrogen losses from urea applied to flooded rice soils 1988 ·Nutrient Cycling in Agroecosystems ·J. R. Simpson,W. A. Muirhead,Kathleen H. Bowmer,(unknown),J. R. Freney	17
14	Effects of Phenylphosphorodiamidate and Dicyandiamide on Nitrogen Loss from Flooded Rice 1985 ·Soil Science Society of America Journal ·J. R. Simpson,J. R. Freney,W. A. Muirhead,R. Leuning	41
15	Assessment of the relative uptake of added and indigenous soil nitrogen by nodulated legumes and reference plants in the 15N dilution measurement of N2 fixation: Derivation of method 1985 ·Soil Biology and Biochemistry ·S.F. Ledgard,Richard Morton,J. R. Freney,F. J. Bergersen,J. R. Simpson	27
16	Processes of ammonia loss from shallow floodwater 1984 ·Atmospheric Environment (1967) ·R. Leuning,O. T. Denmead,J. R. Simpson,J. R. Freney	30
17	Dynamics of Ammonia Volatilization during Furrow Irrigation of Maize 1982 ·Soil Science Society of America Journal ·O. T. Denmead,J. R. Freney,J. R. Simpson	103
18	A modelling approach to nitrogen cycling in agro-ecosystems. 1981 ·J. R. Simpson	1
19	A Direct Field Measurement of Ammonia Emission After Injection of Anhydrous Ammonia 1977 ·Soil Science Society of America Journal ·O. T. Denmead,J. R. Simpson,J. R. Freney	117
20	Effects of time of nitrogen application on the yield and characteristics of the seed produced by Demeter fescue ( Festuca arundinacea ) 1970 ·Australian Journal of Experimental Agriculture and Animal Husbandry ·J. R. Simpson,(unknown)	1

About J. R. Simpson

J. R. Simpson is a scholar working on Environmental Chemistry, Soil Science and Pollution, having authored 35 papers that have together received 2.7k indexed citations. Recurring topics across this work include Magnetic and transport properties of perovskites and related materials (7 papers), Soil and Water Nutrient Dynamics (6 papers) and Electronic and Structural Properties of Oxides (6 papers). The work is most often cited by research in Electronic, Optical and Magnetic Materials (854 citations), Soil Science (385 citations) and Process Chemistry and Technology (101 citations). J. R. Simpson has collaborated with scholars based in Australia, United States and China. Frequent co-authors include J. R. Freney, O. T. Denmead, T. Venkatesan, H. D. Drew, S. R. Shinde, R. Leuning, Satishchandra Ogale, R. L. Greene, Nigel D. Browning and V. N. Kulkarni. Their work appears in journals such as Nature, Physical Review Letters and Physical review. B, Condensed matter.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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