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Topic · Condensed Matter Physics

Superconductivity in MgB2 and Alloys

Superconductivity in MgB2 and Alloys is a research topic within Condensed Matter Physics. Science Explorer counts 15k research works in it since 1950. 9.9% of them reached the world's top 10% most cited for their field and year.

This cluster of papers explores the superconducting properties of magnesium diboride (MgB2), including its high transition temperature, multiple energy gaps, anharmonicity, critical current density enhancement, two-band superconductivity, electron-phonon coupling, isotope effects, and nanostructure doping. The research also investigates the behavior of MgB2 in high magnetic fields.

  • Magnesium Diboride
  • Superconductivity
  • Multiple Gaps
  • Anharmonicity
  • Critical Current Density
  • Two-Band Superconductivity
  • Electron-Phonon Coupling
  • Isotope Effect
  • Nanostructure Doping
  • High Magnetic Field
Research works
15k
fractional, since 1950
In the world top 10%
1.5k
per year above
Top-10% rate
9.9%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
-3%
the tick is no change
Largest producer
China
42% of the 10 largest, 2022-now
Superconductivity in MgB2 and Alloys

Which countries lead Superconductivity in MgB2 and Alloys research?

By volume, China and the United States publish the most (508 and 174 works in 2022-now).

By volume, 2022-now

  1. 1 China 508 works
  2. 2 United States 174 works
  3. 3 Japan 141 works
  4. 4 India 77 works
  5. 5 Russia 67 works
  6. 6 Germany 58 works
  7. 7 United Kingdom 53 works
  8. 8 France 49 works
  9. 9 Italy 45 works
  10. 10 Türkiye 43 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

China: 41.8%United States: 14.3%Japan: 11.6%India: 6.4%6 others listed: 25.9%42%largest
China508 · 41.8%United States174 · 14.3%Japan141 · 11.6%India77 · 6.4%6 others listed314 · 25.9%

Shares of the rows listed above, not of the whole node.

Which institutions lead Superconductivity in MgB2 and Alloys research?

By volume in 2022-now, Chinese Academy of Sciences publishes the most Superconductivity in MgB2 and Alloys research, followed by Russian Academy of Sciences and Centre National de la Recherche Scientifique.

By volume, 2022-now

  1. 1 Chinese Academy of SciencesChina 70 works
  2. 2 Russian Academy of SciencesRussia 32 works
  3. 3 Centre National de la Recherche ScientifiqueFrance 19 works
  4. 4 Slovak Academy of SciencesSlovakia 17 works
  5. 5 National Institute for Materials ScienceJapan 16 works
  6. 6 Helmholtz Association of German Research CentresGermany 15 works
  7. 7 Jilin UniversityChina 14 works
  8. 8 University of Chinese Academy of SciencesChina 12 works
  9. 9 Polish Academy of SciencesPoland 11 works
  10. 10 Southwest Jiaotong UniversityChina 11 works

Who are the leading researchers in Superconductivity in MgB2 and Alloys?

The most-cited researchers publishing on Superconductivity in MgB2 and Alloys include Zhong Lin Wang, John P. Perdew and Georg Kresse.

  1. 1 Zhong Lin Wang United States 491k citations
  2. 2 John P. Perdew United States 436k citations
  3. 3 Georg Kresse Austria 431k citations
  4. 4 Andre K. Geim United Kingdom 315k citations
  5. 5 M. Weber Israel 267k citations
  6. 6 Yi Ping Cui United States 261k citations
  7. 7 Kenji Watanabe Japan 237k citations
  8. 8 Takashi Taniguchi Japan 227k citations
  9. 9 Kai You Wang China 224k citations
  10. 10 Frede Blaabjerg Denmark 203k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in Superconductivity in MgB2 and Alloys?

The most cited paper in Superconductivity in MgB2 and Alloys is "Superconductivity at 39 K in magnesium diboride" (Jun Nagamatsu, Norimasa Nakagawa, Takahiro Muranaka et al., 2001), with 6,487 citations. Next come "Transition temperature of strong-coupled superconductors reanalyzed" (3,656) and "Transition from metallic to tunneling regimes in superconducting microconstrictions: Excess current, charge imbalance, and supercurrent conversion" (3,592).

Most cited papers
#PaperReleasedCitations
1 Superconductivity at 39 K in magnesium diboride Jun Nagamatsu, Norimasa Nakagawa, Takahiro Muranaka et al. · Nature Mar 2001 6,487
2 Transition temperature of strong-coupled superconductors reanalyzed Philip B. Allen, R. C. Dynes · Physical review. B, Solid state Aug 1975 3,656
3 Transition from metallic to tunneling regimes in superconducting microconstrictions: Excess current, charge imbalance, and supercurrent conversion G. E. Blonder, M. Tinkham, T. M. Klapwijk · Physical review. B, Condensed matter Apr 1982 3,592
4 Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system Alexander P. Drozdov, M. I. Eremets, Ivan A. Troyan et al. · Nature Open access 17 Aug 2015 2,784
5 More accurate generalized gradient approximation for solids Zhigang Wu, R. E. Cohen · Physical Review B Open access 20 Jun 2006 2,381
All 99 most cited papers, with filters and sorting

Where is Superconductivity in MgB2 and Alloys research done?

The largest centres of Superconductivity in MgB2 and Alloys research in 2022-now are Beijing (China), Tokyo (Japan), Xi'an (China) and Moscow (Russia). Among places with at least 20 works in it, it is an unusually large share of all research in Tsukuba.

Largest cities, 2022-now

  1. 1 BeijingChina 112 works
  2. 2 TokyoJapan 43 works
  3. 3 Xi'anChina 39 works
  4. 4 MoscowRussia 36 works
  5. 5 ShanghaiChina 33 works
  6. 6 ChengduChina 25 works
  7. 7 HefeiChina 25 works
  8. 8 TsukubaJapan 25 works
  9. 9 NanjingChina 22 works
  10. 10 BratislavaSlovakia 16 works

Where it is the local speciality

  1. TsukubaJP · 24.7 works14×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Superconductivity in MgB2 and Alloys than the world average.

See Superconductivity in MgB2 and Alloys on the map

Where is the best place to study Superconductivity in MgB2 and Alloys?

Among universities, judged by research, Jilin University, Victoria University of Wellington and University of Chinese Academy of Sciences score highest, combining excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

0%10%20%mean 10.06%fractional works in this field (log) →share of work in the world top 10% →North China Electric…Jilin UniversityVictoria University …University of Chines…
above the meannear itbelow it

One dot per university in the first ten of the table below, at the default weights. The upper left is the interesting corner: small places doing unusually strong work.

Excellenceshare of its work in the world top 10%, 2022-now and all time averaged
40%
Specialisationhow much of its work is in this field, counted up to 10× the world share
10%
Sizeits output in this field, on a log scale
30%
Growthoutput growth, counted from -20% to +20%
10%
Internationalshare of its work with a co-author abroad
10%
Each slider sets a weight; the share it gets of the score is beside it.
#UniversityScoreTop 10%SpecialisationWorksGrowth
1Jilin UniversityChina 81.617.6%8.8×14 +91.6%
2Victoria University of WellingtonNew Zealand 75.615.3%32.6×10 +44.2%
3University of Chinese Academy of SciencesChina 50.211.0%5.2×12 -4.8%
4North China Electric Power UniversityChina 48.218.5%10.0×10 +3.9%
5University of OxfordUnited Kingdom 35.40.7%4.6×9 +152.0%
6Southwest Jiaotong UniversityChina 33.45.8%9.8×11 +70.7%
7Northwestern Polytechnical UniversityChina 32.16.3%6.4×10 +177.6%
8University of Science and Technology of ChinaChina 26.87.5%5.1×9 +29.6%
9Shanghai Jiao Tong UniversityChina 26.014.0%2.2×9 -33.2%
10Tohoku UniversityJapan 19.83.9%9.5×9 -27.1%

Universities only. The score blends excellence (40%), size (30%), specialisation (10%), growth (10%), international reach (10%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise.

Every institution in Superconductivity in MgB2 and Alloys, country by country

Is Superconductivity in MgB2 and Alloys research growing?

Output in 2022-2025 was 3% lower than in 2018-2021, peaking in 2007.

still counting19801990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Superconductivity in MgB2 and Alloys as a percentage of every work published that year, 0.0058% in 2024.

still counting0.020%0.040%Superconductivity in MgB2 and Alloys0.0061% in 202519801990200020102020

Fractional works of Superconductivity in MgB2 and Alloys over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

still counting5%10%15%Superconductivity in MgB2 and Alloys10.2% in 2025200020102020

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.

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