A. P. Ramirez

21.8k citations

181 papers · 17.6k · 6 hit papers · h-index 61

Impact in

Condensed Matter Physics top 0.05%
- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Rare-earth and actinide compounds
Electronic, Optical and Magnetic Materials top 0.1%
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials

Papers in

Condensed Matter Physics 108
- Advanced Condensed Matter Physics 76
- Physics of Superconductivity and Magnetism 49
- Rare-earth and actinide compounds 24
- Theoretical and Computational Physics 18
Electronic, Optical and Magnetic Materials 84
- Magnetic and transport properties of perovskites and related materials 43
- Multiferroics and related materials 19

Co-authors: P. Schiffer (7 shared papers)Robert C. Haddon (16 shared papers)D. W. Murphy (10 shared papers)S‐W. Cheong (3 shared papers)R. J. Cava (23 shared papers)Matthew J. Rosseinsky (9 shared papers)S. H. Glarum (6 shared papers)A. R. Kortan (4 shared papers)
Journals: Physical Review Letters (36 papers)Nature (14 papers)Physical review. B, Condensed matter (14 papers)Journal of Solid State Chemistry (10 papers)Physical Review B (7 papers)
Partner nations: United States Germany United Kingdom

In The Last Decade

A. P. Ramirez

178 papers receiving 17.2k citations

A. P. Ramirez's Hit Papers

6 papers align trajectories log scale

Geometrical frustration 2006 · 532 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2006 Physics Today
1999 Nature
1995 Physical Review Letters
1994 Annual Review of Materials Science
1991 Nature
1991 Nature

Peers

Countries citing papers authored by A. P. Ramirez

Since Specialization

Citations

This map shows the geographic impact of A. P. Ramirez'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 A. P. Ramirez with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. P. Ramirez more than expected).

Fields of papers citing papers by A. P. Ramirez

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. P. Ramirez. 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 A. P. Ramirez. The network helps show where A. P. Ramirez may publish in the future.

Co-authors

The 25 scholars most cited alongside A. P. Ramirez, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with A. P. Ramirez Line = papers co-authored together A. P. Ramirez links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 181 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Superconductivity at 18 K in potassium-doped C60 Nature ·A. F. Hebard, Matthew J. Rosseinsky, Robert C. Haddon, D. W. Murphy, S. H. Glarum, T. T. M. Palstra, A. P. Ramirez, A. R. Kortan Hit paper breakdown →	1991	2437
2	Low Temperature Magnetoresistance and the Magnetic Phase Diagram ofLa1−xCaxMnO3 Physical Review Letters ·P. Schiffer, A. P. Ramirez, (unknown), S‐W. Cheong Hit paper breakdown →	1995	1918
3	Strongly Geometrically Frustrated Magnets Annual Review of Materials Science ·A. P. Ramirez Hit paper breakdown →	1994	1375
4	Zero-point entropy in ‘spin ice’ Nature ·A. P. Ramirez, A. Hayashi, R. J. Cava, Rahul Siddharthan, B. Sriram Shastry Hit paper breakdown →	1999	957
5	Geometrical frustration Physics Today ·Roderich Moessner, A. P. Ramirez Hit paper breakdown →	2006	532
6	Relation of structure and superconducting transition temperatures in A3C60 Nature ·R. M. Fleming, A. P. Ramirez, Matthew J. Rosseinsky, D. W. Murphy, Robert C. Haddon, S. M. Zahurak, A. V. Makhija Hit paper breakdown →	1991	441
7	Cupric oxide as an induced-multiferroic with high-TC Nature Materials ·T. Kimura, Y. Sekio, Hiroyuki Nakamura, Theo Siegrist, A. P. Ramirez	2008	408
8	Absence of ferromagnetism in Co and Mn substituted polycrystalline ZnO Physical Review B ·G. Lawes, Aditi Risbud, A. P. Ramirez, Ram Seshadri	2005	405
9	Defects in Carbon Nanostructures Science ·Otto Zhou, R. M. Fleming, D. W. Murphy, C. H. Chen, Robert C. Haddon, A. P. Ramirez, S. H. Glarum	1994	392
10	Electric Polarization Rotation in a Hexaferrite with Long-Wavelength Magnetic Structures Physical Review Letters ·T. Kimura, G. Lawes, A. P. Ramirez	2005	370
11	Colossal magnetoresistance in Cr-based chalcogenide spinels Nature ·A. P. Ramirez, R. J. Cava, J. J. Krajewski	1997	364
12	Colossal Magnetoresistance Without Mn ³⁺ /Mn ⁴⁺ Double Exchange in the Stoichiometric Pyrochlore Tl ₂ Mn ₂ O ₇ Science ·M.A. Subramanian, Brian H. Toby, A. P. Ramirez, W.J. Marshall, A.W. Sleight, G. H. Kwei	1996	278
13	Phonon density of states and negative thermal expansion in ZrW2O8 Nature ·G. Ernst, C. Broholm, Glen R. Kowach, A. P. Ramirez	1998	263
14	Preparation and structure of the alkali-metal fulleride A4C60 Nature ·R. M. Fleming, Matthew J. Rosseinsky, A. P. Ramirez, D. W. Murphy, John C. Tully, Robert C. Haddon, Theo Siegrist, Robert Tycko, S. H. Glarum, P. Marsh, Gary Dabbagh, S. M. Zahurak, A. V. Makhija, C. Hampton	1991	252
15	Synthesis and characterization of alkali metal fullerides: AxC60 Journal of Physics and Chemistry of Solids ·D. W. Murphy, Matthew J. Rosseinsky, R. M. Fleming, Robert Tycko, A. P. Ramirez, Robert C. Haddon, Theo Siegrist, Gary Dabbagh, John C. Tully, R. E. Walstedt	1992	211
16	Morphology Effectively Controls Singlet-Triplet Exciton Relaxation and Charge Transport in Organic Semiconductors Physical Review Letters ·V. K. Thorsmølle, Richard D. Averitt, J. Demšar, D. L. Smith, Sergei Tretiak, R. L. Martin, X. Chi, B. K. Crone, A. P. Ramirez, Antoinette J. Taylor	2009	201
17	A van der Waals antiferromagnetic topological insulator with weak interlayer magnetic coupling Nature Communications ·Chaowei Hu, Kyle Gordon, Pengfei Liu, Jinyu Liu, Xiaoqing Zhou, Peipei Hao, Dushyant Narayan, Eve Emmanouilidou, Hongyi Sun, Yuntian Liu, Harlan Brawer, A. P. Ramirez, Lei Ding, Huibo Cao, Qihang Liu, Dan Dessau, Ni Ni	2020	196
18	Amorphouslike Density of Gap States in Single-Crystal Pentacene Physical Review Letters ·D. V. Lang, X. Chi, Theo Siegrist, A. M. Sergent, A. P. Ramirez	2004	184
19	The Materials Genome Initiative, the interplay of experiment, theory and computation Current Opinion in Solid State and Materials Science ·Juan Pablo, Barbara Jones, Cora Lind Kovacs, Vidvuds Ozoliņš, A. P. Ramirez	2014	183
20	Electronic properties of normal and superconducting alkali fullerides probed byC13nuclear magnetic resonance Physical Review Letters ·Robert Tycko, Gary Dabbagh, Matthew J. Rosseinsky, D. W. Murphy, A. P. Ramirez, R. M. Fleming	1992	180

About A. P. Ramirez

A. P. Ramirez is a scholar working on Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Materials Chemistry, Electrical and Electronic Engineering and Atomic and Molecular Physics, and Optics, having authored 181 papers that have together received 17.6k indexed citations. Recurring topics across this work include Advanced Condensed Matter Physics (76 papers), Physics of Superconductivity and Magnetism (49 papers), Magnetic and transport properties of perovskites and related materials (43 papers), Rare-earth and actinide compounds (24 papers), Multiferroics and related materials (19 papers), Theoretical and Computational Physics (18 papers), Fullerene Chemistry and Applications (17 papers) and Organic Electronics and Photovoltaics (15 papers). The work is most often cited by research in Condensed Matter Physics (8.6k citations), Electronic, Optical and Magnetic Materials (8.2k citations), Materials Chemistry (9.2k citations), Organic Chemistry (3.9k citations) and Geophysics (1.1k citations). A. P. Ramirez has collaborated with scholars based in United States, Germany and United Kingdom. Frequent co-authors include P. Schiffer, Robert C. Haddon, D. W. Murphy, S‐W. Cheong, R. J. Cava, Matthew J. Rosseinsky, S. H. Glarum, A. R. Kortan, T. T. M. Palstra and A. F. Hebard. Their work appears in journals such as Physical Review Letters, Nature, Physical review. B, Condensed matter, Journal of Solid State Chemistry and Physical Review B.

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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A. P. Ramirez

A. P. Ramirez's Hit Papers

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