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Research facility · Sofia · Bulgaria

Georgi Nadjakov Institute of Solid State Physics

In research, Georgi Nadjakov Institute of Solid State Physics stands highest in Physical Sciences (#7,259 of 12,888 worldwide), 2022–2025. Relative to its size it is most specialised in Physics and Astronomy — Physics and Astronomy is 8.2× its share of world research.

issp.bas.bg/?lang=enROR OpenAlex
World rank, 2022–2025
#13,426
of 28,054 · #5,825 all time
Rank in Bulgaria
#29
of 92
Research works
2.5k
▲ 12% vs 2013–17
Citations
24k
9.4 per fractional work
Top-10% rate
4.6%
record average 16.5%
Open access
17%
world 28%

What is Georgi Nadjakov Institute of Solid State Physics known for in research?

The fields where it stands highest, 2022–2025, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Physical SciencesDomain #7,259 of 12,888 4.1%115 #3586

Each strip is that field’s whole ranked pool, with the notch where Georgi Nadjakov Institute of Solid State Physics sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no world mark, because the world rate differs by field (from about 6% to 21% in this record).

What does Georgi Nadjakov Institute of Solid State Physics specialise in?

Where its research is concentrated relative to its size: Physics and Astronomy takes 8.2× the share of its output that it takes of world research.

  1. Physics and AstronomyField · 24.7 works8.2×
← less than its size predicts1×more →

Location quotient, a volume reading rather than an impact one. It surfaces small, lopsided specialities.

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.27× its world share, 2 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.07× its world share, 8 worksBiochemistry, Geneti…Immunology and Microbiology: 0.27× its world share, 0 worksImmunology and Micro…Neuroscience: 0.28× its world share, 1 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.78× its world share, 1 worksPharmacology, Toxico…Chemical Engineering: 4.13× its world share, 2 worksChemical EngineeringChemistry: 2.05× its world share, 4 worksChemistryComputer Science: 0.35× its world share, 4 worksComputer ScienceEarth and Planetary Sciences: 1.69× its world share, 4 worksEarth and Planetary …Energy: 1.26× its world share, 2 worksEnergyEngineering: 2.01× its world share, 41 worksEngineeringEnvironmental Science: 0.22× its world share, 2 worksEnvironmental ScienceMaterials Science: 6.86× its world share, 33 worksMaterials ScienceMathematics: 0.16× its world share, 0 worksMathematicsPhysics and Astronomy: 8.16× its world share, 25 worksPhysics and AstronomyDentistry: 1.55× its world share, 1 worksDentistryMedicine: 0.16× its world share, 4 worksMedicineNursing: 0.42× its world share, 0 worksNursingArts and Humanities: 0.39× its world share, 2 worksArts and HumanitiesDecision Sciences: 0.13× its world share, 0 worksDecision SciencesEconomics, Econometrics and Finance: 0.31× its world share, 1 worksEconomics, Econometr…Psychology: 0.05× its world share, 0 worksPsychologySocial Sciences: 0.07× its world share, 1 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Physics and Astronomy, 8.2×. Every wedge is a field page.

Who are the top researchers at Georgi Nadjakov Institute of Solid State Physics?

Ranked on the composite score, J. Čermák, M. Gospodinov and S. Tonchev lead among researchers whose main affiliation is Georgi Nadjakov Institute of Solid State Physics.

  1. 1 J. Čermák Bulgaria · #538,098 worldwide 64 citations · 23 works
  2. 2 M. Gospodinov Bulgaria · #669,092 worldwide 184 citations · 55 works
  3. 3 S. Tonchev Bulgaria · #752,689 worldwide 43 citations · 35 works
  4. 4 Nikola V. Sabotinov Bulgaria · #764,670 worldwide 39 citations · 35 works
  5. 5 E. Vateva Bulgaria · #778,549 worldwide 46 citations · 15 works
  6. 6 E. Pecheva Bulgaria · #834,193 worldwide 24 citations · 18 works
  7. 7 A. Andreev Bulgaria · #852,684 worldwide 49 citations · 23 works
  8. 8 V. Syneček Bulgaria · #891,560 worldwide 20 citations · 15 works
  9. 9 S. Alexandrova Bulgaria · #940,553 worldwide 42 citations · 24 works
  10. 10 А. Г. Петров Bulgaria · #1,029,346 worldwide 73 citations · 86 works
All ranked researchers at Georgi Nadjakov Institute of Solid State Physics

Which keywords describe research at Georgi Nadjakov Institute of Solid State Physics?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Nanoparticles, Nanostructures, Semiconductors, Nanocrystals, Semiconductor, Electronic Structure, Nanowires and Photovoltaics.

▲ more of its work than of the world’s◆ about the world’s share▼ less than the world’s

Size is fractional works in 2022–2025 in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Nanoparticles10▲ 5.8×23 topics
  2. Nanostructures7▲ 13×13 topics
  3. Biomedical Applications6▲ 3.8×16 topics
  4. Semiconductors6▲ 13×5 topics
  5. Nanocrystals5▲ 14×5 topics
  6. Semiconductor5▲ 11×7 topics
  7. Electronic Structure5▲ 21×7 topics
  8. Nanowires5▲ 25×3 topics
  9. Photovoltaics5▲ 22×4 topics
  10. Biosensors5▲ 7.0×8 topics
  11. Spintronics5▲ 28×3 topics
  12. Nanomaterials5▲ 3.2×12 topics
  13. Crystal Growth4▲ 11×10 topics
  14. Nanocomposites4▲ 3.8×12 topics
  15. Nonlinear Optics4▲ 26×3 topics
  16. Photonic Crystals4▲ 24×5 topics
  17. Quantum Computing4▲ 28×4 topics
  18. Two-Dimensional Materials4▲ 12×4 topics
  19. Superconductivity4▲ 16×7 topics
  20. Raman Spectroscopy4▲ 14×6 topics
  21. Solar Cells4▲ 13×7 topics
  22. Frequency Conversion4▲ 62×3 topics
  23. Optical Modulators4▲ 17×3 topics
  24. Microresonators3▲ 30×3 topics
  25. Doping3▲ 26×2 topics
  26. Nanoelectronics3▲ 27×2 topics
  27. Spectroscopy3▲ 14×8 topics
  28. Colloidal Crystals3▲ 50×2 topics
  29. Quantum Dots3▲ 24×3 topics
  30. Raman Lasers3▲ 20×2 topics
  31. Transparent Conductors3▲ 18×2 topics
  32. Membrane Proteins3▲ 31×2 topics
  33. Room Temperature3▲ 14×3 topics
  34. Atomic Layer Deposition3▲ 31×1 topic
  35. High-k Dielectrics3▲ 31×1 topic
  36. Lipid Rafts3▲ 60×1 topic
  37. Membrane Lipids3▲ 75×1 topic
  38. Band Parameters3▲ 37×2 topics
  39. Molecular Dynamics3▲ 12×5 topics
  40. Surface-Enhanced Raman Spectroscopy3▲ 33×2 topics

Which research topics does Georgi Nadjakov Institute of Solid State Physics publish most on?

By volume in 2022–2025: Lipid Membrane Structure and Behavior, Semiconductor materials and devices, Advanced Fiber Laser Technologies and ZnO doping and properties.

Lipid Membrane Structure…3Lipid Membrane Structure and Behavior: 3 fractional worksSemiconductor materials …3Semiconductor materials and devices: 3 fractional worksAdvanced Fiber Laser Technologies: 2 fractional worksZnO doping and properties: 2 fractional works2D Materials and Applications: 2 fractional worksPhotonic and Optical Devices: 2 fractional worksChalcogenide Semiconductor Thin Films: 2 fractional worksnanoparticles nucleation…2nanoparticles nucleation surface interactions: 2 fractional worksSemiconductor Quantum Structures and Devices: 2 fractional worksGas Sensing Nanomaterials and Sensors: 2 fractional works
Molecular BiologyElectrical and Electronic EngineeringAtomic and Molecular Physics, and OpticsMaterials Chemistry1 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Lipid Membrane Structure and Behavior Molecular Biology 3 works
  2. 2 Semiconductor materials and devices Electrical and Electronic Engineering 3 works
  3. 3 Advanced Fiber Laser Technologies Atomic and Molecular Physics, and Optics 2 works
  4. 4 ZnO doping and properties Materials Chemistry 2 works
  5. 5 2D Materials and Applications Materials Chemistry 2 works
  6. 6 Photonic and Optical Devices Electrical and Electronic Engineering 2 works
  7. 7 Chalcogenide Semiconductor Thin Films Electrical and Electronic Engineering 2 works
  8. 8 nanoparticles nucleation surface interactions Atmospheric Science 2 works
  9. 9 Semiconductor Quantum Structures and Devices Atomic and Molecular Physics, and Optics 2 works
  10. 10 Gas Sensing Nanomaterials and Sensors Electrical and Electronic Engineering 2 works

How open and international is its research?

Against the world’s own shares — the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available17.2%not open82.8%

World: 28% of research is openly available.

with international co-authors31.6%domestic only68.4%

World: 19% is written across borders.

How has Georgi Nadjakov Institute of Solid State Physics's research output changed?

Output in 2018–2022 was 12% higher than in 2013–2017.

1990200020102020
grewheldshrank

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

Other research institutions in Sofia

All research institutions in Sofia

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners are in the interactive view on the map.