Kirill Belashchenko, Associate Professor
Physics & Astronomy
University of Nebraska–Lincoln
310D Jorgensen Hall
Lincoln, Nebraska 68588-0299
- Exotic behavior of magnetocrystalline anisotropy in (Fe1-xCox)2B alloys (PRL 2015, APL 2015)
- Construction of magnetic phase diagrams in alloys from first principles (PRL 2015)
- Effects of thermal spin disorder and excess Mn on the half-metallic gap in NiMnSb (PRB Rapid Comm 2015)
- Microscopic, first-principles model of strain-induced interaction in concentrated size-mismatched alloys (PRB 2014)
- Spin injection from a half-metal at finite temperatures (PRB 2012)
- Biquadratic interaction in ferropnictides (Nature Physics 2011)
- Imaging and control of surface magnetization domains in a magnetoelectric antiferromagnet (PRL 2011)
- Robust isothermal electric control of exchange bias at room temperature (Nature Materials 2010, PRL 2010)
Talks, Lectures, Highlights
- Raising the Néel temperature of a magnetoelectric antiferromagnet (LabTalk highlight in JPCM)
- Effects of thermal spin fluctuations on the electronic properties of itinerant magnets (SPICE-Workshop on Computational Quantum Magnetism, Mainz, May 2015)
- Electric resistivity and spin injection in the presence of thermal spin disorder (KITP program on Spintronics, Santa Barbara, December 2013)
- Lecture on magnetism (Muffin-tin recipes at Forschungszentrum Jülich, 2011)
- Voltage-controlled exchange bias
Our research is in computational electronic theory of solids. Usually we use so-called first-principles techniques which are based in one way or another on the solution of the quantum-mechanical Schroedinger equation for the given material or nanostructure. The solutions may be used to calculate various measurable properties such as the atomic structure, magnetization, electric resistance or resistivity, response to external fields, spectroscopic properties, etc. Because the general equations are unsolvable, physical insight and clever approximations are always needed to make the calculations manageable. Many different techniques are available, and new ones are constantly being developed. Our work includes both application of appropriate methods to problems of fundamental and practical interest and development of new computational techniques.
Much of our research is related to "spintronic" applications, i. e. those dealing with existing or potential electronic devices whose operation depends on the manipulation of the electron spin (rather than charge used in traditional semiconductor electronics). Examples include magnetic tunnel junctions which are used as miniature field sensors in hard-drive read heads and as non-volatile random-access memory bits in specialized microchips, magnetoelectric heterostructures that can potentially enable fast, non-volatile, and low-power "magnetoelectric memory," or devices based on injection, manipulation, and detection of spin-polarized currents in semiconductors, which may potentially lead to a new generation of more efficient devices for computers. Our research, in particular, helps understand the properties of materials, as well as those of their surfaces or interfaces, which may be useful for such devices.
Our publications can be found here.