Oksana E. Kvitnytska
Head of the research team "Andreev-reflection spectroscopy of modern superconductors"
Candidate of Sciences in Physics and Mathematics (Ph.D.)
Senior researcher
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine
47 Nauky Ave., Kharkiv, 61103, Ukraine
e-mail: kvitnitskaya@ilt.kharkov.ua
Date and place of birth: April 5, 1968, Kharkiv, Ukraine.
Education background
1991: Kharkiv Polytechnical Institute (Kharkiv, Ukraine), Master degree in Physics (focus on Physics of Metals, Diploma with honour).
1991-1994: correspondent Post-Graduate Study in B.Verkin Institute for Low Temperature Physics and Engineering (Kharkiv, Ukraine) (focus on Low Temperature Solid State Physics).
1997: Candidate of Sciences in Physics and Mathematics (Ph.D.) – Certificate of B. Verkin ILTPE of NASU, speciality – Solid State Physics.
2007: Senior Researcher, speciality – Solid State Physics.
Career
1991: Engineer – B. Verkin ILTPE of NASU.
1995: Junior Scientist – B. Verkin ILTPE of NASU.
1998: Researcher – B. Verkin ILTPE of NASU.
2003: Senior Researcher – B. Verkin ILTPE of NASU.
Area of expertise
1. Exploitation of 4He low temperature cryogenic set-up, fabrication of point contacts.
2. Study of different quasiparticle excitations and mechanisms of conduction electron scattering in metals by point-contact spectroscopy.
3. Investigation of the normal, magnetic and superconducting ground state in the heavy-fermion, mixed valence, boride superconductors, pnictide superconductors, topological materials by point-contact spectroscopy.
4. Study the interplay of superconductivity and magnetism in superconductors.
5. Investigation of superconductors by point-contact spectroscopy: temperature and magnetic field dependence of the superconducting order parameter, Andreev reflection, Josephson effect, critical current etc.
Scientific and organizational activity
2014: Member of the Scientific Council of B. Verkin ILTP of NANS on the problem "Electronic properties of conducting and superconducting systems".
Participation in international projects
1995-1996: DAAD Grant at II Physikalisches Institut, Universität zu Köln, Germany.
1997-1998: Research stay at High Magnetic Field Laboratory, CNRS-MPI, Grenoble, France.
2004: DAAD-NATO Grant, Physikalisches Institut, Universität Bayreuth, Germany.
2008-2009: Alexander von Humboldt Foundation grant at Leibniz Institute for Solid State and Materials Research Dresden, Germany.
2013–2016: Alexander von Humboldt research group linkage project, Germany.
2017–2020: Volkswagen Foundation grant, Germany.
Awards
1999: Prize for Young Scientist by the National Academy of Science of Ukraine.
Key publications
1. Naidyuk, Yu.G., Kvitnitskaya, O.E., Nowack, A., Yanson, I.K., Menovsky, A.A., Anysotropy of point-contact characteristics of URu2Si2 in the normal state. Low Temp. Phys. 21, 236-240 (1995).
2. Nowack, A., Wasser, S., Kvitnitskaya, O.E., Schlabitz, W., Fisk, Z., Point-contact spectroscopy of YbBe13. Phys. Rev. B 56, 14964-14971 (1997).
DOI: https://doi.org/10.1007/BF02570280
3. Naidyuk, Yu.G., Kvitnitskaya, O.E., Jansen, A.G.M., Geibel, C., Menovsky, A.A., Wyder, P., Point-contacts of URu2Si2 and UPd2Al3 in high magnetic fields. Physica B 284-288, 1293-1294 (2000).
DOI: https://doi.org/10.1016/S0921-4526(99)02570-3
4. Naidyuk, Yu.G., Kvitnitskaya, O.E., Yanson, I.K., Drechsler, S.-L., Behr, G., Otani, S. Electron-phonon interaction in transition metal diborides TB2 (T=Zr, Nb, Ta) studied by point-contact spectroscopy. Phys. Rev. B 66, 140301-140304 (R) (2002).
DOI: https://doi.org/10.1103/PhysRevB.66.140301
5. Naidyuk, Yu.G., Yanson, I.K., Kvitnitskaya, O.E., Lee, S., Tajima, S., Search for E2g phonon modes in MgB2 single crystals by point-contact spectroscopy. Phys. Rev. Lett. 90, 1970011-1970014 (2003).
DOI: https://doi.org/10.1103/PhysRevLett.90.197001
6. Kvitnitskaya, O., Naidyuk, Yu.G., Yanson, I.K., Karkin, A., Naumov, S., Kostromitina, N., Point-contact spectroscopy of the normal state excitations in PrOs4Sb12. Physica B 378-380, 187-188 (2006).
DOI: https://doi.org/10.1016/j.physb.2006.01.071
DOI: https://doi.org/10.1016/j.physc.2007.03.165
8. Kvitnitskaya, O.E., Naidyuk Yu.G., Yanson I. K., Niemeier T., Fuchs G., Holzapfel B., Schultz L., Point-contact study of the LuNi2B2C borocarbide superconducting film. Superconductor Science and Technology, 23, 115001-1-115001-5 (2010).
DOI: https://doi.org/10.1088/0953-2048/23/11/115001
9. Naidyuk Yu.G., Kvitnitskaya O.E., Tiutrina L.V., Yanson I.K., Behr G., Fuchs G., Drechsler S.-L., Nenkov K., Schultz L., Peculiarities of the superconducting gaps and the electron-boson interaction in TmNi2B2C as seen by point-contact spectroscopy, Phys. Rev. B 84, 094516-1-094516-9 (2011).
DOI: https://doi.org/10.1103/PhysRevB.84.094516
10. Naidyuk Yu.G., Kvitnitskaya O.E., Gamayunova N.V., Boeri L., Aswartham S., Wurmehl S., Büchner B., Efremov D.V., Fuchs G., Drechsler S.-L., Single 20-meV boson mode in KFe2As2 detected by point-contact spectroscopy, Phys. Rev. B, 90, 094505-1-094505-9 (2014).
DOI: https://doi.org/10.1103/PhysRevB.90.094505
11. Naidyuk Yu. G., Kvitnitskaya O. E., Gamayunova N. V., Bashlakov D. L., Tyutrina L. V., Fuchs G., Hühne R., Chareev D. A., Vasiliev A. N., Superconducting gaps in FeSe studied by soft point-contact Andreev reflection spectroscopy. Phys. Rev.B, 96, 094517-1-094517-7 (2017).
DOI: https://doi.org/10.1103/PhysRevB.96.094517
12. Surface superconductivity in the Weyl semimetal MoTe2 detected by point contact spectroscopy // Yu.G. Naidyuk, O.E. Kvitnitskaya, D.L. Bashlakov, S. Aswartham, I. Morozov, I. Chernyavskii, G. Fuchs, S.-L. Drechsler, R. Hühne, K. Nielsch, B. Büchner, D. Efremov // 2D Materials.- 2018.-V. 5, P. 045014 (1-8).
DOI: https://doi.org/10.1088/2053-1583/aad3e2
13. Yanson point-contact spectroscopy of Weyl semimetal WTe2 // Yu.G. Naidyuk, O.E. Kvitnitskaya, D.L. Bashlakov, S. Aswartham, I. Morozov, I. Chernyavskii,
G. Shipunov, G. Fuchs, S.-L. Drechsler, R. Hühne, K. Nielsch, B. Büchner, D. Efremov // 2D Materials.- 2019.-V. 6, P. 045012 (1-10).
DOI: https://doi.org/10.1088/2053-1583/ab2db7
14. Sub-kelvin Andreev reflection spectroscopy of superconducting gaps in FeSe / D.L. Bashlakov, N.V. Gamayunova, L.V. Tyutrina, J. Kačmarčik, P. Szabó, P. Samuely, and Yu.G. Naidyuk // Low Temperature Physics.- 2019.-V. 45, P. 1222.
DOI: https://doi.org/10.1063/10.0000133
15. Enhanced critical temperatures in the strongly overdoped iron-based superconductors AFe2As2 (A = K, Cs, Rb) observed by point contacts / Yu.G. Naidyuk, O.E. Kvitnitskaya, D.V. Efremov, S.-L. Drechsler // Low Temperature Physics.- 2020.-V. 46, P. 1070 (1-3).
DOI: https://doi.org/10.1063/10.0002149
16. Switchable domains in point contacts based on transition metal tellurides // Yu.G. Naidyuk, D.L. Bashlakov, O.E. Kvitnitskaya, B.R. Piening, G. Shipunov, D.V. Efremov, S. Aswartham, B. Büchner // Phys. Rev. Materials.- 2021.-V. 5, P. 084004.
DOI: https://doi.org/10.1103/PhysRevMaterials.5.084004
17. Superconductivity in hole-doped germanium point contacts / N.V. Gamayunova, M. Kuzmiak, P. Szabó, P. Samuely, Yu.G. Naidyuk // Low Temperature Physics.- 2022.-V. 48, P. 136.
Contacts
47 Nauky Ave., Kharkiv, 61103, Ukraine
e-mail: terekhov@ilt.kharkov.ua
tel.: +380(99)764-2075
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