Dr. Viktor E. Bursian
		grants	papers	Curriculum Vitae	personal
		interests	results	my teachers	friends

SPECIALIZATION:

(i) main field

paramagnetic defects in solids;

(ii) other fields

off-center impurities,

phase transitions,

high-Tc superconductivity;

(iii) current research interest

defects in perovskite-type ferroelectrics,

photo-induced charge transfer in insulators,

microscopic origins for non-linear optical features;

(iv) technical skills

spectroscopy of solids, namely, electron paramagnetic resonance (EPR), photoluminescence, photoconductivity, optically detected magnetic resonance (ODMR), Raman spectroscopy; also computer simulations, data acquisition methods and automation of experimental setups.

papers in refereed journals and proceedings - 20; total - 39.

•      Interpretation was given for anomalous dynamics of inhomogeneous line shape (EPR and optical absorption) in the system of reorienting impurities affected by alternating electric field (off-center Co²⁺ in SrO).

 
•      New type of maser-effect (inverse spin level population and stimulated emission) due to spin-flip tunneling of off-center paramagnetic ions under the action of alternating electric field has been obtained experimentally.  Computer simulations support the model and give the values for tunneling matrix elements.

 
•      Persistent spectral hole burning was found in optical absorption of Co²⁺ off-center impurities in SrO caused from their reorientations in excited state.

 
•      New threshold-like behavior of the magnetic memory effects has been observed in bismuth-based high-Tc superconducting crystals by the investigations of low-field microwave absorption.

 
•      The location of Cr levels in the band gap of SrTiO₃ was found.  It was shown that photoionization transitions play a dominating role in the mechanism of photoluminescence of Cr³⁺ ions under optical excitation in the visible (with photon energies markedly smaller than E_g).  Long time persisting increase of the photoconductivity for the light with energy less than 2.1 eV was found as a result of previous illumination with higher photon energies.

 
•      Orientation sensitive recharging of tetragonal Fe_K-O_i and Fe_Ta-V_O centers in KTaO₃ under polarized optical irradiation was observed.  It results in the pseudo-alignment of the centers in particular charge state.  A phenomenological model involving photo charge transport was given, which allows for a semi-quantitative description of the experiments.

EMPLOYMENT:
 

1985-1987	Trainee Researcher at  Solid State Optics Department (headed by Prof.A.A.Kaplyanskii),   the Division of Solid State Physics,   A.F.Ioffe Physical-Technical Institute, Russian Academy of Sciences, St.Petersburg
1987-1996	Junior Researcher, ibid.
since 1996	Researcher, ibid.

OTHER APPOINTMENTS:
 

10/1995-12/1995	Visiting Fellow at Universitat Leipzig, Leipzig, Germany
3/1997-8/1997	Visiting Fellow at Laser Physics Centre, RSPhysSE, Australian National University, Canberra, Australia
9/2000-12/2000	Short-term consulting work at St.Petersburg's Branch of Corning Inc., St.Petersburg, Russia

GRANTS:
 

1993	personal grant from International Science Foundation (ISF);
1994-1995	long-term research grant from ISF, no.NUP000, "Nature and properties of the coherent quantum paraelectric state in perovskite incipient ferroelectrics", member of team;
1995	visiting grant from Deutsche Forschungsgemeinschaft (DFG), 2-months visit to Universität Leipzig, Germany;
1994-1995	research grant from Russian Foundation for Basic Research (RFBR), no.94-02-06292, "Nature and properties of the new coherent paraelectric state in perovskite incipient ferroelectrics", member of team;
1996-1998	research grant from RFBR, no.96-02-17972, "Photoinduced phenomena in nominally pure and doped crystals of incipient ferroelectrics: charge transfer and localization effects, structure of electron centers and specificity of their interaction with charge carriers", member of team;
1996-1998	bilateral research grant, DFG and RFBR, no.436 RUS 113/341/1 & 96-02-00138, "The role of lattice defects in cooperative phenomena and phase transitions in real and incipient perovskite-type ferroelectrics and mercury halide ferroelastics", member of team;
1997	visiting grant, Bilateral Science and Technology Grant, Australian Department of Industry, Science and Technology, 5-months visit to Australian National University, Australia;
1999-2001	research grant from RFBR, no.99-02-18319, "Photo charge transfer in dielectric oxides with small band gap, activated by transient ions and rare-earth ions", member of team.

PERSONAL:

I speak Russian (native), English (fluent), and German.  I like reliable work and I hate quickies of any kind.  I am professional also in programming and I was responsible for a number of commercial projects as the leader of free-lance team.

CONTACT:
 

address:	Dr. V. E. Bursian, A. F. Ioffe Physical-Technical Institute,  26 Politekhnicheskaya ul.,  St.Petersburg 194021, Russia
phones:	+7 (812) 247-91-74, +7 (812) 247-99-11
fax:	+7 (812) 247-10-17
e-mail:	Viktor.Bursian@mail.ioffe.ru
ICQ:	# 35046684  nickname off-center
home address:	7-68 Shkolnaya ul., Kommunar, Leningradskaya obl. 188320, Russia
home phone:	+7 (812) 460-02-82

SELECTED PUBLICATIONS (in English):

• V.E.Bursian, V.S.Vikhnin, L.S.Sochava. Electric field splitting of ESR lines for reorienting dipole centers. Time effects. // Sov.Phys.Solid State, v.29, no.3, p.481-484 (1987).
• V.E.Bursian, A.A.Bush, V.S.Vikhnin, I.V.Gladyshev, and L.S.Sochava. Low-field microwave absorption in bismuth-based high-T_c superconducting single crystals: threshold vortex-lattice effects. // JETP Lett., v.50, no.3, p.135-139 (1989).
• V.E.Bursian, A.A.Bush, V.S.Vikhnin, I.V.Gladyshev, L.S.Sochava.  Detection of the structure of low-field microwave absorption and magnetic field thresholds of effects occurring in bismuth-based single crystals of high-temperature superconductors. // Sov.Phys.Solid State, v.31, no.7, p.1219-1225 (1989).
• L.S.Sochava, V.S.Vikhnin, V.E.Bursian.  New mechanism of spin polarisation and maser-effect in off-centre paramagnetic ion system. // Proc. of the XII Internat. Conf. on Defects in Insulating Materials, Nordkirchen, Germany, August 16-22, 1992, ed. by O.Kanert and J.-M.Spaeth, World Scientific Publ.Co, p.390-401 (1993).
• V.Trepakov, F.Smutny, V.Vikhnin, V.Bursian, L.Sochava, L.Jastrabik, P.Syrnikov. The effects of defect system ordering in a weakly doped incipient ferroelectric (KTaO₃): dielectric manifestation. // J.Phys.: Condens.Matter, v.7, p.3765-3777 (1995).
• S.A.Basun, U.Bianchi, V.E.Bursian, A.A.Kaplyanskii, W.Kleemann, L.S.Sochava, V.S.Vikhnin.  Study of photoinduced charge transfer in SrTiO₃: luminescence, photoconductivity and photo-EPR. // SPIE Proc., v.2706, p.73-82 (1996).
• S.A.Basun, U.Bianchi, V.E.Bursian, A.A.Kaplyanskii, W.Kleemann, L.S.Sochava, V.S.Vikhnin.  Photoinduced Phenomena in Sr_1-xCa_xTiO₃, 0 <= x <= 0.12. // Ferroelectrics, v.183, p.255-264 (1996).
• S.A.Basun, U.Bianchi, V.E.Bursian, A.A.Kaplyanskii, W.Kleemann, L.S.Sochava, V.S.Vikhnin.  Charge Transfer Processes and Dynamic Equilibrium of Electronic State Occupancies in Optically Excited SrTiO₃:Cr Crystals. // J. Luminescence, v.66&67, p.526-530 (1996).
• S.A.Basun, V.E.Bursian, H.Hesse, S.Kapphan, L.S.Sochava, V.S.Vikhnin. Polarization Sensitive Photo Recharging and Optical Alignment of the Tetragonal Fe³⁺ Centers in KTaO₃. // In Materials Science Forum, Trans Tech Publications, Switzerland, v.239-241, p.345-348 (1997).
• V.E.Bursian, V.S.Vikhnin, L.S.Sochava.  Observation of superhyperfine structure in the ESR spectra of two tetragonal Fe centers in KTaO₃ and a new model for the center. // Physics of the Solid State, v.39, no.4, p.547-549 (1997).
• D.V.Azamat, S.A.Basun, V.E.Bursian, A.G.Razdobarin, L.S.Sochava, H.Hesse, S.Kapphan.  EPR of a non-Kramers iron ion in KTaO₃. // Physics of the Solid State, v.41, no.8, p.1303-1306 (1999).
• H.Riesen, V.E.Bursian, N.B.Manson.  Efficient non-photochemical spectral hole burning in single crystal SrO:Co²⁺. // J.Luminescence, v.85, p.107-112 (1999).
• L.S.Sochava, V.E.Bursian, A.G.Razdobarin.  Electric-Field-Induced Orientation of Iron Tetragonal Centers in KTaO₃. // Physics of the Solid State, v.42, no.9, p.1640-1642 (2000).
• S.A.Basun, V.E.Bursian, A.G.Razdobarin, L.S.Sochava.  Anisotropic photoionization as a mechanism of the alignment of axial iron centers in KTaO₃. // Physics of the Solid State, v.43, no.6 (2001). In press.

		grants	papers	Curriculum Vitae	personal
		interests	results	my teachers	friends