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{\Large \bf Theoretical Condensed Matter\\
 and Statistical Physics Group}\\
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Professor          &:& Toshihiro~Kawakatsu,~Yoshio~Kuramoto,\\
& & Riichiro~Saito, and Komajiro~Niizeki\\
Associate Professor &:& Sumio~Ishihara,~Toru~Sakai~and~Yoshinori~Hayakawa~\\
Assistant Professor
 &:& Nariya~Uchida,~Hiroaki~Kusunose,~Tatsuya~Nakajima,\\
 & & Tsuyoshi~Hondou~and~Hisatoshi~Yokoyama\\
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(http://www.cmpt.phys.tohoku.ac.jp/)\\
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The condensed matter theory group covers a large area of solid state
physics and statistical physics, based on two fundamental frameworks;
quantum mechanics and statistical mechanics. Exotic, new and
fundamental properties are of interest in highly correlated systems,
soft materials, nano-materials, quasi-crystal and so on. In addition
to analytical approach, we perform numerical calculations for
non-equilibrium systems or for electronic systems using sophisticated
techniques. Domestic and international collaborations with
experimental groups or industries stimulate our activities
significantly. Every member of this large group is available for
discussions on a daily basis, thereby helping student to understand
the many aspects of current physics.

The following lists the research subjects for each group
member. Further details can be found from the Web, or direct contact
with group members can be made by e-mail.
 
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\noindent{\bf  Kawakatsu}:  
Theory and simulation on the mesoscopic 
structures and their dynamics of soft materials 
such as polymers and surfactants.

\noindent{\bf  Kuramoto}:
Magnetism and superconductivity in strongly correlated quantum systems, 
fractional statistics and supersymmetry in low-dimensional systems.

\noindent{\bf  Saito}:
Solid state properties of carbon nanotubes, semiconductor physics, 
electronic structure calculations.

\noindent{\bf  Niizeki}:
Structures and electronic states of quasicrystals; renormalization group,
fractal geometry and computer simulation.


\noindent{\bf  Ishihara}:
Theory of correlated electron systems; spin-charge-orbital coupled
quantum-liquid in oxides, colossal magnetic, electric and optical
responses.
%, electron correlation and electron-lattice interaction.

\noindent{\bf  Sakai}:
Statistical theory of quantum spin and strongly 
correlated electron systems like high-$T_c$ 
superconductors. 
%Current topics are field-induced phenomena (quantization of 
%magnetization, Bose condensation of magnons, etc.) 

\noindent{\bf  Hayakawa}: 
%Study on 
%Statistical properties of nonequilibrium systems and 
%nonlinear dynamics of complex systems; 
Fractal pattern growth, 
collective dynamics of motile elements, computer simulations of
crack propagation and fragmentation of material.

\noindent{\bf  Uchida}: 
Soft condensed matter, esp. pattern formation, 
nonlocal interaction and dynamics of phase
transition in complex fluids.

\noindent{\bf  Kusunose}:
Theory of magnetism and superconductivity in correlated electron systems with 
orbital degrees of freedom.

\noindent{\bf  Nakajima}:
Theory of low dimensional systems; quantum Hall effect, Bose-Einstein
condensation in dilute bose gas.

\noindent{\bf  Hondou}:
Statistical physics and thermodynamics of small systems: thermal energy 
conversions, equations of state etc.

\noindent{\bf  Yokoyama}:
%Theoretical studies on 
Strongly correlated electron 
systems, especially on high temperature superconductivity,
itinerant magnetism and low-dimensional spin systems. 

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