Languages:

Ukrainian, Russian, English

Education:

Field of Scientific Interest:

Theoretical physics, frustrated systems, low-dimensional systems, numerical calculations, deep learning

Main Achievements:

• Proposed and studied an effective nonfrustrated model for the antiferromagnetic spin-1/2 ladder, providing analytical and numerical insight into its magnetic ground state.
• Discovered and characterized the exotic ground state of the decorated honeycomb lattice and frustrated decorated Ising chain.
• Revealed the influence of boundary structure of ferromagnetic clusters inside antiferromagnetic matrices on their magnetic properties in external fields.
• Investigated the thermal conductivity of complex clathrate-type crystals and molecular solids, developing an exponential approximation for the coherence contribution.
• Analyzed the ground state of one-dimensional generalized Wigner crystals and narrow-band conductors in disordered systems, identifying mechanisms of translational symmetry breaking.
• Applied advanced numerical methods (Monte Carlo, DMRG, exact diagonalization) to model quantum and classical spin systems with frustration and long-range interactions.

Professional Experience:

Educational Activity:

A manual has been created for students and postgraduates of scientific and technical specialties
Slavin V. V., Kryvchikov O. O., Laptev D. V. Numerical methods in theoretical condensed matter physics.

Publications:

Number of papers: 25 (in the refereed journals - 13)

Selected Publications for the last 10 years:

1. Laptiev D. V., Kryvchikov O. O., Savin Y. V., & Slavin V. V. (2025). Magnetic properties of the frustrated decorated Ising chain.
2. Laptiev D. V., Kryvchikov O. O., Savin Y. V., & Slavin V. V. (2024). Magnetic properties of the frustrated Ising chain. Low Temperature Physics, 50(2), 158–166.
3. Krivchikov A. I., Horbatenko Y. V., Korolyuk O. A., Romantsova O. O., Kryvchikov O. O., Szewczyk D., & Jeżowski A. (2023). Exponential approximation of the coherence contribution to the thermal conductivity of complex clathrate-type crystals. Materialia, 32, 101944.
4. Kryvchikov O. O., & Laptiev D. V. (2023). The exotic ground state of the decorated honeycomb lattice. Low Temperature Physics, 49(12), 1439–1443.
5. Krivchikov A., Andersson O., Korolyuk O., & Kryvchikov O. (2022). Thermal conductivity of solid triphenyl phosphite. Molecules, 27(23), 8399.
6. Kryvchikov O. (2022). Effective nonfrustrated model of the antiferromagnetic spin-1/2 ladder. Low Temperature Physics, 48(3), 200–206.
7. Pastur L. A., Slavin V. V., & Krivchikov A. A. (2021). One-dimensional narrow-band conductors. Low Temperature Physics, 47(9), 715–739.
8. Krivchikov, A. A. (2019). The influence of boundary structure of ferromagnetic clusters inside of antiferromagnetic matrix on their magnetic properties in an external field. Fizika Nizkikh Temperatur, 45(5).
9. Krivchikov, A. A. (2019). How the structure of ferromagnetic cluster boundaries in an antiferromagnetic matrix impacts their magnetic properties in an external field. Low Temperature Physics, 45(5), 500–508.
10. Slavin, V. V., & Krivchikov, A. A. (2016). The ground state structure of a one-dimensional generalized Wigner crystal on a weakly disordered host-lattice. Low Temperature Physics, 42(9), 782–787.