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NEWS

Our first fully online event "UKRATOP DAYS 2020" took place on June 29th-July 2nd. We enjoyed progress reports from ten scholarsip holders, as well as nine seminars and a popular lecture as a part of our 2nd UKRATOP Workshop "Topological Phenomena in Quantum Materials". Five candidates from our 3rd Selection Workshop have been offered student scholarships. Congratulations!

 

 

 

 


 

About

The scientific goal of the project "Topological order of electrons in solids: New materials, Phenomena & application Concepts" (UKRATOP) is to design new high-quality materials with exceptional surface and edge conditions resulting from their topological nature. The topological stability of the exotic physical properties of these materials can be of tremendous interest to the next generation of information technology.
UKRATOP is funded by the Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung, BMBF) under reference 01DK18002.

Scientific Output

Curvature induced magnonic crystal in nanowires
Anastasiia Korniienko, Volodymyr P. Kravchuk, Oleksandr V. Pylypovskyi, Denis D. Sheka, Jeroen van den Brink, and Yuri Gaididei,
SciPost Phys. 7, 035 (2019)

Magnetization-induced shape transformations in flexible ferromagnetic rings
Yuri Gaididei, Kostiantyn V. Yershov, Denis D. Sheka, Volodymyr P. Kravchuk, and Avadh Saxena,
Phys. Rev. B 99, 014404 (2019)

Spin eigenexcitations of an antiferromagnetic skyrmion
Volodymyr P. Kravchuk, Olena Gomonay, Denis D. Sheka, Davi R. Rodrigues, Karin Everschor-Sitte, Jairo Sinova, Jeroen van den Brink, and Yuri Gaididei
Phys. Rev. B 99, 184429 (2019)

Spontaneous deformation of flexible ferromagnetic ribbons induced by Dzyaloshinskii-Moriya interaction
Kostiantyn V. Yershov, Volodymyr P. Kravchuk, Denis D. Sheka, Jeroen van den Brink, and Yuri Gaididei
Phys. Rev. B 100, 140407(R) (2019)

Evolution of the charge carrier plasmon in the one-dimensional metal TTF-TCNQ as a function of temperature and momentum
Nikolay Kovbasa, Lukas Graf and Martin Knupfer
Mater. Res. Express 6, 106319 (2019)

Possible experimental realization of a basic Z2 topological semimetal in GaGeTe
E. Haubold, A. Fedorov, F. Pielnhofer, I. Rusinov, T. Menshchikova, V. Duppel, D. Friedrich, R. Weihrich, A. Pfitzner, A. Zeugner, A. Isaeva, S. Thirupathaiah, Y. Kushnirenko, E. Rienks, T. Kim, E. Chulkov, B. Büchner, S. Borisenko
APL Materials 7, 121106 (2019)

Temperature induced shift of electronic band structure in Fe(Se,Te)
Y. V. Pustovit, A. A. Kordyuk
Low Temperature Physics 45, 1172 (2019)

Domain wall diode based on functionally graded Dzyaloshinskii–Moriya interaction
K. V. Yershov, V. P. Kravchuk, D. D. Sheka, J. van den Brink, A. Saxena
Appl. Phys. Lett. 116, 222406 (2020)

Turning charge-density waves into Cooper pairs
A. Chikina, A. Fedorov, D. Bhoi, V. Voroshnin, E. Haubold, Y. Kushnirenko,K. H. Kim, S. Borisenko
npj Quantum Materials 5, 22 (2020)

See also:

Strongly correlated superconductor with polytypic 3D Dirac points
Sergey Borisenko, Volodymyr Bezguba, Alexander Fedorov, Yevhen Kushnirenko, Vladimir Voroshnin, Mihai Sturza, Saicharan Aswartham, and Alexander Yaresko
https://arxiv.org/abs/1909.10806

Curvature effects on phase transitions in chiral magnets
Kostiantyn V. Yershov, Volodymyr P. Kravchuk, Denis D. Sheka, and Ulrich K. Rößler
https://arxiv.org/abs/2001.07618

Domain wall diode based on functionally graded Dzyaloshinskii-Moriya interaction
Kostiantyn V. Yershov, Volodymyr P. Kravchuk, Denis D. Sheka, Jeroen van den Brink, Avadh Saxena
https://arxiv.org/abs/2004.02175

Polymorphic PtBi2 - candidate for topological superconductivity
G. Shipunov, I. Kovalchuk, B. R. Piening, V. Labracherie, A. Veyrat, R. Giraud, J. Dufouleur, S. Shokri, F. Caglieris, C. Hess, D. V. Efremov, B. Büchner, and S. Aswartham
https://arxiv.org/abs/2002.03976

Curvilinear one-dimensional antiferromagnets
O. V. Pylypovskyi, D. Y. Kononenko, K. V. Yershov, U. K. Rößler, A.V. Tomilo, J. Faßbender, J. van den Brink, D. Makarov, D. D. Sheka,
https://arxiv.org/abs/2005.05835

Solitary wave excitations of skyrmion strings in chiral magnets
V. P. Kravchuk, U. K. Rößler, J. van den Brink, and M. Garst
https://arxiv.org/abs/1902.01420