Condensed matter theory

Welcome to the website of Condensed Matter Theory Group founded by Professor Iya Ipatova (1929-2003) at Ioffe Institute of Russian Academy of Sciences. Our group's interests focus on understanding the physical processes in semiconductor technology. Our goal is to develop theoretical concepts and computational methods that enable us to optimise the semiconductor growth technology processes.

We develop the ideas of novel nanophotonic devices mainly for Vertical Cavity Surface Emitting Lasers. VCSELs are semiconductor laser diodes which emit the light perpendicular to the chip surface. They have several advantages over the conventional edge-emitting lasers which makes them highly attractive for applications in optoelectronics. VCSELs can be tested on the wafer, large two-dimensional arrays of devices can be built on a single wafer, and the lower divergence angle of the output beam allows high coupling efficiency with optical fibers.

Another subject of our interest is the optical properties of semiconductor nanostructures with the special interest in polaron effects in the wide bandgap nanostructures. We study the polarization effects of the exciton and calculate polaron energies of electron and the hole; it has been shown that phonon replica spectral lines are well resoled in quantum dot. Effects of Yahn-Teller interaction and surface phonons are considered.

One more area of our interest is energy storage in the systems with nanostructured electrodes materials, such as supercapacitors with graphene-based electrodes. This work includes the study of energy/power limiting effects and degradation dynamics processes.

Our research retrospective

Recent publications

• A. Yu. Maslov O. V. Proshina,
  Electron-Phonon Interaction in Quantum Wells Based on Uniaxial Materials, Semiconductors 53, 1617 (2019)
• M.E. Kompan, V.G. Malyshkin,
  The Reverse Relaxation Effect and Structure of Porous Electrodes in Supercapacitors, Tech. Phys. Lett. 45, 45 (2019)
• A. Yu. Maslov O. V. Proshina,
  The Influence of New Phonon Branches on Spinodal Decomposition of Solid Solutions, Int. J. Res. Eng. Sci. 7, 37 (2019)
• A. Yu. Maslov O. V. Proshina,
  Chapter 1. Interface Phonons and Polaron States in Quantum Nanostructures, In "Phonons in Low Dimensional Structures", (2018)
• M.E. Kompan, V.G. Malyshkin,
  A Giant Frequency Shift in the Raman Spectrum of Water Adsorbed on a Metallic Silver Surface, Tech. Phys. Lett. 44, 77 (2018)
• N.N. Ledentsov, V.A. Shchukin, et. al.,
  A Design and New Functionality of Antiwaveguiding Vertical-Cavity Surface-Emitting Lasers for a Wavelength of 850 nm, Tech. Phys. Lett. 44, 36 (2018)
• N.N. Ledentsov, V.A. Shchukin, et. al.
  (In,Ga,Al)P-GaP laser diodes grown on high-index GaAs surfaces emitting in the green, yellow and bright red spectral range, Semicond. Sci. Technol. 32, #025016 (2017)
• M.E. Kompan, V.G. Malyshkin, V.P. Kuznetsov, V.A. Krivchenko,
  Specifics of energy storage in a double layer on the surface of a graphene material, Tech. Phys. Lett. 43, 177 (2017)
• A. Yu. Maslov O. V. Proshina,
  Electron-phonon interaction in II-VI quantum wells, physica status solidi c 13, 507 (2016)
• A. Yu. Maslov O. V. Proshina,
  Polaron mass of charge carriers in semiconductor quantum wells, Semiconductors 49, 1344 (2015)

1. V.A. Shchukin and D. Bimberg. Spontaneous ordering of nanostructures on crystal surfaces. Rev. Mod. Phys. Vol. 71, No.4, pp. 1125-1171, 1999
2. N.N. Ledentsov, V.M. Ustinov, V.A. Shchukin, P.S. Kop'ev, Zh.I. Alferov, and D. Bimberg. Quantum dot heterostructures: fabrication, properties, lasers (Review). Fiz. Tekh. Poluprovodn. vol. 32, No. 4, pp. 385-410, 1998 [Semiconductors, vol. 32, No. 4, pp. 343-365, 1998]
3. V.A. Shchukin and D. Bimberg. Strain-driven self-organization of nanostructures on semiconductor surfaces. Appl. Phys. A vol. 67, pp. 687-700, 1998
4. I.P. Ipatova, A.A. Maradudin. Lattice Vibrations, Statistics of. Enciclopedia of Applied Physics, l.8, pp. 465-484, 1994
5. B.H. Bairamov, I.P. Ipatova, V.A. Voitenko. Light Scattering from Current Carriers in Semiconductors. Phys. Reports v.229, No 5, pp. 223-290, 1993
6. B.H. Bairamov, I.P. Ipatova, V.A. Voitenko, Light Scattering from Electron Density Fluctuations in Manyvalley Semiconductors, Sov. Phys. Uspekhi v.36, No 5, pp. 392-435, 1993
7. M. Cardona, I. Ipatova. Effect of Electron Excitations on Light Scattering and Phonons. in: Elementary Excitations in Solids, ds, J.L. Birman, C. Sebenne, R.F. Wallis, North Holland, Amsterdam, pp. 237-282, 1992 download PDF
8. I.P. Ipatova. Universal Parameters in Mixed Crystals. In: Modern Problems of Condensed Matter, vol. 23, "Optical Properties of Mixed Crystals", eds, R.J. Elliott and I.P. Ipatova, North Holland Publishing House, Amsterdam, pp. 1-14, 1988
9. I.P. Ipatova, Yu.E. Kitaev. Landau Theory of Second Order Phase Transitions on the Solid State Surfaces. Progress in Surface Science, vol. 18, No. 3, pp. 189-246, 1985

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