THEME01-3-1072-2009/2013

Next theme	Prev. theme
to field of reseach	to contents

01-3-1072-2009/2013

Priority:

Status:

New

Theory of Condensed Matter and New Materials

Leaders:	V.B. Priezzhev V.A. Osipov
Scientific leader:	N.M. Plakida

Scientific Programme:
Multiparticle models of solids taking into consideration strong electron correlations, electron-lattice, and spin interactions to describe spectra of quasiparticle excitations, phase transitions and kinetic phenomena in solids. In equilibrium and nonequilibrium media with strong correlations such as liquids and nuclear matter, the processes of multifragmentation, clusterization in phase transitions and the influence of surface effects on properties of clusters. In the theory of superconductivity, nonstandard mechanisms of pairing in metal-oxides, the problem of bipolaron stability in a polaron gas environment, the influence of strong electric fields and temperature gradients on elastic, magnetic, and thermal properties of granular superconductors. For a study of mechanisms of phase transitions caused by charge, orbital, and magnetic ordering in magnetic semiconductors and in metals with a large magnetoresistance, experimental data obtained at the Frank Laboratory of Neutron Physics, JINR, by neutron scattering and the µSR method will be used.
Nonlinear problems in multiparticle theory will be studied by using modern methods of the renormalization group theory, the inverse scattering problem, fractal geometry, and the conformal field theory. The main subjects of the study are integrable systems, equilibrium systems of the statistical mechanics, and dissipative systems far from the thermodynamic equilibrium. The aim of these investigations is to reveal common properties of the multiparticle systems associated with the ideas of self-similarity and universality.
The microstructure of amorphous state will be studied in the framework of the theoretical model where topological disorder is introduced via arrays of disclination dipoles and loops. The thermal properties of disclinated media are of primary interest. The electronic spectrum of carbon materials, fullerenes and nanotubes, will be examined within the field-theory model adapted to account for nontrivial geometry of these nanostructures. The model of random Josephson junction arrays will be studied and applied to describe high-temperature granular superconductors.
In the theory of finite quantum systems, local and low-dimensional states of matter obtained in modern experiments will be investigated. In particular, properties of quasiparticles in mesoscopic systems and the Bose-Einstein condensation in atomic traps will be studied.

Expected main results in 2009:

Investigation of the transport properties of carbon nanotube with spatially alternating chirality (in the presence of disclination dipole); calculation of the electron properties of the rippled graphene.

Study of the magnetic properties of spinor condensed atoms in optical traps.

Evaluation of the impact of topological defects in low-dimentional heterogenous structures on transport properties for a wide temperature range.

Investigation of the energy spectrum of condensed atoms in the BEC model of an anisotropic rotated trap with losses.
Study of the local electronic structure and thermodynamic characteristics of the spin-state transitions in complex cobalt oxides using the quantum-chemical program packages.

Elaboration of the lattice model of symplectic fermions, calculation of its conformal weights and comparison of the results with the predictions of the logarithmic conformal field theory.

List of Activities
	Activity or Experiment	Leader	Principal Researchers
1.	Physical properties of complex materials and nanostructures	N.M. Plakida V.A. Osipov G. Ropke
			A.Yu. Cherny A.V. Chizhov W. Kleinig E.A. Kochetov S.E. Krasavin A.L. Kuzemsky V.A. Moskalenko V.N. Plechko J. Schmelzer V.Yu. Yushankhai
2.	Mathematical problems of many-particle systems	V.B. Priezzhev M.A. Smondyrev V.I. Yukalov
			L. Aleksandrov E.V. Bukina V.M. Dubovik V.I. Inozemtsev A.E. Patrik A.M. Povolotsky V.P. Spiridonov P.E. Zhidkov

Collaboration
Country or International Organization	City	Institute or Laboratory
Armenia	Yerevan	YerPhI
		YSU
Belarus	Minsk	BSPU
		IP NASB
Belgium	Antwerp	UA
Brazil	Brasilia, DF	UnB
	San Paulo, SP	USP
Bulgaria	Sofia	IMS BAS
		IPC BAS
		ISSP BAS
		SU
Canada	Montreal	Concordia
	Quebec	Univ.
	Kingston	Queen's
	London	UWO
Czech Republic	Rez	NPI ASCR
France	Marseille	Univ.
	Nice	UN
Germany	Bremen	Univ.
	Brunswick	TU
	Dortmund	TU Dortmund
	Darmstadt	GSI
	Dresden	IFW
		MPI-PkS
		TU Dresden
	Duisburg	UDE
	Erlangen	Univ.
	Leipzig	Univ.
	Magdeburg	OvGU
	Rostock	Univ.
	Stuttgart	MPI-FKF
Hungary	Budapest	KFKI RMKI
India	Mumbai	TIFR
Ireland	Dublin	DIAS
Italy	Catania	Univ.
	Salerno	UniSa
Poland	Cracow	JU
	Warsaw	IPCh PAS
		FP WUT
	Katowice	US
	Poznan	IP AMU
		IMP PAS
Romania	Bucharest	IFIN-HH
Russia	Moscow	IGIC RAS
		LPI RAS
		MEPhI
		PFUR
		SINP MSU
		MI RAS
		RRC KI
	Belgorod	BelSU
	Dubna	BMIREA
	Gatchina	PNPI RAS
	Perm	PSU
	St. Petersburg	ETU
		IPTI RAS
		SPbSU
	Troitsk	HPPI RAS
	Voronezh	VSU
	Yekaterinburg	IMP UB RAS
Moldova	Kishinev	IAP ASM
		TUM
Mongolia	Ulaanbaatar	NUM
Montenegro	Podgorica	Univ.
Slovak Republic	Bratislava	IP SAS
	Kosice	IEP SAS
Slovenia	Ljubljana	UL
Spain	Madrid	ICMM
Switzerland	Villigen	PSI
Taiwan	Taipei	IP AS
Ukraine	Kharkov	KFTI NASU
	Kiev	IMP NASU
	Lvov	ICMP NASU
USA	Chicago, IL	Urbana Univ.
	New York, NY	CUNY
	Rochester, NY	UR
	Tallahassee, FL	FSU
Uzbekistan	Tashkent	Assoc."P.-S." PTI
Vietnam	Hanoi	IMS VAST

Next theme	Prev. theme
to field of reseach	to contents