Bulgaria's Top 2% Scientists 2020: Career-Long List

Bulgaria has 50 scientists on the 2020 career-long Top 2% list. That places Bulgaria 51st in the world by number of listed scientists. Sofia University St. Kliment Ohridski has the most listed scientists (11), followed by Bulgarian Academy of Sciences (7).

Single Year

First year listed

Career Data

First year listed

World rank by count

#51

First year listed

Institutes

First year listed

Scientists in Bulgaria on the list, by year

Career-long list, change on the previous year

2021+46.0%

2022+4.1%

2023+3.9%

2024+10.1%

2025+4.6%

Show the numbers

Year	Single Year	Change	Career Data	Change
2020	35		50
2021	48	+37.1%	73	+46.0%
2022	55	+14.6%	76	+4.1%
2023	58	+5.5%	79	+3.9%
2024	70	+20.7%	87	+10.1%
2025	63	-10.0%	91	+4.6%

Top 10 institutes in Bulgaria

By number of listed scientists

Career-long list2020

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All 50 scientists

Career-long list2020

Everyone on the list, free to browse.

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Rank in Bulgaria	World rank	Scientist	Institute	Sub-field	Rank in sub-field
1	8,700	AK Atanassov, Krassimir	Bulgarian Academy of Sciences	Artificial Intelligence & Image Processing	Rank 158
2	14,124	HK Hadjiivanov, Konstantin	Bulgarian Academy of Sciences	Physical Chemistry	Rank 62
3	25,503	BV Bankova, Vassya	Institute of Organic Chemistry with Centre of Phytochemistry (IOCCP) Bulgarian Academy of Sciences	Medicinal & Biomolecular Chemistry	Rank 87
4	30,282	KD Kashchiev, Dimo	Institute of Physical Chemistry Bulgarian Academy of Sciences	Chemical Physics	Rank 698
5	31,880	DN Denkov, Nikolai	Sofia University St. Kliment Ohridski	Chemical Physics	Rank 723
6	33,560	PV Popov, V. N.	Sofia University St. Kliment Ohridski	Applied Physics	Rank 804
7	39,027	KI Kostova, Irena	Medical University of Sofia	Medicinal & Biomolecular Chemistry	Rank 130
8	42,149	PD Pavlov, Detchko	Bulgarian Academy of Sciences	Energy	Rank 389
9	44,125	VN Vitanov, Nikolay V.	Sofia University St. Kliment Ohridski	General Physics	Rank 304
10	47,369	KP Kralchevsky, Peter A.	Sofia University St. Kliment Ohridski	Chemical Physics	Rank 1,049
11	56,922	VS Vassilev, Stanislav V.	Bulgarian Academy of Sciences, Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”	Energy	Rank 556
12	57,077	MA Milchev, Andrey	Bulgarian Academy of Sciences	Fluids & Plasmas	Rank 571
13	69,045	II Ivanov, Ivan T.	Sofia University St. Kliment Ohridski	Chemical Physics	Rank 1,426
14	70,497	CI Christov, Ivan P.	Sofia University St. Kliment Ohridski	Optoelectronics & Photonics	Rank 236
15	91,623	DK Danov, Krassimir D.	Sofia University St. Kliment Ohridski	Chemical Physics	Rank 1,830
16	95,763	DV Dimitrov, Vesselin	University of Chemical Technology and Metallurgy Sofia	Applied Physics	Rank 2,491
17	96,129	AD Andreeva, D.	Institute of Catalysis Bulgarian Academy of Sciences	Physical Chemistry	Rank 381
18	101,038	VG Vayssilov, Georgi N.	Sofia University St. Kliment Ohridski	Physical Chemistry	Rank 402
19	101,509	MO Mekenyan, Ovanes	Bourgas Prof. Assen Zlatarov University	Medicinal & Biomolecular Chemistry	Rank 444
20	102,554	HJ Hristov, Jordan Y.	University of Chemical Technology and Metallurgy Sofia	Chemical Engineering	Rank 436
21	102,648	GI Grabchev, Ivo	Sofia University St. Kliment Ohridski	Chemical Physics	Rank 2,033
22	105,906	AI Avramov, I.	Institute of Physical Chemistry Bulgarian Academy of Sciences	Applied Physics	Rank 2,768
23	110,023	YS Yazadjiev, Stoytcho S.	Institute of Mathematics and Informatics Bulgarian Academy of Sciences	Nuclear & Particle Physics	Rank 1,800
24	111,803	EJ Edward, J. T.	Institute of Organic Chemistry with Centre of Phytochemistry (IOCCP) Bulgarian Academy of Sciences	General Chemistry	Rank 319
25	113,115	BM Bojinov, Martin	University of Chemical Technology and Metallurgy Sofia	Energy	Rank 1,241
26	122,838	TD Tsalev, Dimiter L.	Sofia University St. Kliment Ohridski	Analytical Chemistry	Rank 968
27	123,589	MA Milchev, Alexander	Institute of Physical Chemistry Bulgarian Academy of Sciences	Energy	Rank 1,355
28	133,389	ED Exerowa, Dotchi	Institute of Physical Chemistry Bulgarian Academy of Sciences	Chemical Physics	Rank 2,578
29	135,225	BV Bojinov, Vladimir B.	University of Chemical Technology and Metallurgy Sofia	Organic Chemistry	Rank 2,361
30	148,328	VV Velikova, Violeta	Institute of Plant Physiology and Genetics	Plant Biology & Botany	Rank 2,062
31	153,049	KD Karagiozova, D.	Bulgarian Academy of Sciences	Mechanical Engineering & Transports	Rank 916
32	166,222	DI Doytchinova, Irini	Medical University of Sofia	Medicinal & Biomolecular Chemistry	Rank 837
33	172,843	PA Popova, A.	University of Chemical Technology and Metallurgy Sofia	Materials	Rank 2,297
34	173,489	DV Dobrev, Vladimir	Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences	Nuclear & Particle Physics	Rank 2,821
35	181,105	CI Christov, Ivaylo Ivanov	Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences	Biomedical Engineering	Rank 848
36	183,561	RA Rachev, Alexander	Institute of Mechanics Bulgarian Academy of Sciences	Biomedical Engineering	Rank 865
37	189,717	GI Gutzow, Ivan S.	Institute of Physical Chemistry Bulgarian Academy of Sciences	Applied Physics	Rank 5,149
38	214,219	TV Tsakova, Vessela	Institute of Physical Chemistry Bulgarian Academy of Sciences	Energy	Rank 2,636
39	227,030	GM Georgiev, Milen I.	Bulgarian Academy of Sciences	Biotechnology	Rank 867
40	228,293	ZV Zimparov, Ventsislav D.	Technical University of Gabrovo	Mechanical Engineering & Transports	Rank 1,453
41	243,610	PK Panajotov, Krassimir	Georgi Nadjakov Institute of Solid State Physics Bulgarian Academy of Sciences	Optoelectronics & Photonics	Rank 1,114
42	243,940	AS Armyanov, Stephan	Bulgarian Academy of Sciences	Energy	Rank 3,075
43	244,103	KA Karamanov, Alexander	Institute of Physical Chemistry Bulgarian Academy of Sciences	Materials	Rank 3,337
44	255,404	PP Peshev, P.	Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences	Materials	Rank 3,481
45	268,733	GM Gulubova, Maya Vladova	Trakia University Faculty of Medicine	General & Internal Medicine	Rank 2,209
46	298,293	MN Mastorakis, Nikos E.	Technical University of Sofia	Electrical & Electronic Engineering	Rank 1,001
47	381,871	GS Groudev, Stoyan	University of Mining and Geology St. Ivan Rilski	Mining & Metallurgy	Rank 238
48	515,523	PM Panayotova, Marinela	University of Mining and Geology St. Ivan Rilski	Mining & Metallurgy	Rank 361
49	576,859	KM Karavasteva, M.	Sofia University St. Kliment Ohridski	Mining & Metallurgy	Rank 415
50	684,618	DT Dachev, Tsvetan	Space Research and Technology Institute	Aerospace & Aeronautics	Rank 1,791
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Career-long list2020

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Career-long list2020

Poland726 scientistsin 2020

Russia709 scientistsin 2020

Czech Republic335 scientistsin 2020

Hungary282 scientistsin 2020

Romania100 scientistsin 2020

Slovakia46 scientistsin 2020

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Frequently asked questions

How many scientists from Bulgaria are in the 2020 Stanford Top 2% list?

35 scientists affiliated with Bulgaria are on the 2020 single-year list, and 50 are on the career-long list.

Which institute in Bulgaria has the most Top 2% scientists?

On the 2020 career-long list, Sofia University St. Kliment Ohridski has the most listed scientists from Bulgaria, with 11. It is followed by Bulgarian Academy of Sciences with 7.

What is the difference between the single-year and career-long lists?

The single-year list ranks scientists on the citations their work received in one year. The career-long list ranks them on citations across their whole career. Both lists are published every year, and a scientist can be on one, both or neither.

What is the official source of this data?

The rankings come from the science-wide author databases of standardized citation indicators published by Ioannidis et al. in the Elsevier Data Repository, updated every year. TOPSCINET, an independent platform, organises that data by country, year, institute and field, so you can compare and explore it.