Welcome to the ON-1.2 group website
Our research group consists of one professor Tomasz Story (head of the group), one
We are engaged in experimental research and technological activities in the field of physics of semiconductor and magnetic materials, in particular topological
Our main experimental expertise is with electric, thermoelectric, optical, magnetic, and structural properties of IV−VI, II–VI, and III\-V semiconductors. It, in particular, concerns our discoveries of: (1)
Our current main research projects:
Topological crystalline insulators
- Angle- and
spin-resolved photoemission (ARPES) studies of Dirac topological states in (Pb,Sn)Se, (Pb,Sn,Mn)Se, and (Pb,Sn,Mn)Te - STM/STS experimental studies of electronic states along atomic steps on the surface of topological crystalline insulators
- Quantum oscillations (Shubnikov–de Haas and de Haas–van Alphen effects) in bulk and surface electronic states of SnTe
Thermoelectric materials
- Thermoelectric alloys based on (Pb,Sn,Mn)Te:Bi and (Pb,Sn)Te:Cr semiconductors
- Thermoelectric bulk nanocomposites PbTe-CdTe:Bi,Na
- Layered thermoelectric
CdTe-PbTe crystalline nanocomposites
Semiconductor spintronics
- Ferromagnetic transition and magnetic anisotropy of (Ge,Sn,Mn)Te and (Sn,Mn)Te layers with distorted crystal lattice
- Magnetic properties of core/shell GaAs/(Ga,Mn)As nanowires
Semiconductor nanowires
- Structural properties of core/shell (Ga,In)As/(Ga,Mn)As/(Ga,Al)As ferromagnetic nanowires on GaAs or Si substrates
- MBE growth, structural and electric properties of topological SnTe nanowires
Infrared optoelectronic materials
- Photoluminescence control in (Pb,Cd)Te/CdTe and (Pb,Cd)Se/CdSe quantum well and quantum dot structures by quantum size effect, strain, and band gap engineering
Our technological facilities cover:
- Self-selecting vapor phase growth (SSVG) of high quality monocrystals of
IV-VI andII-VI semiconductors, e.g., PbTe, PbSe, PbS, SnTe, GeTe, (Pb,Sn)Se, (Pb,Sn)Te - Bridgman method of the growth from the melt of
IV-VI semiconductor substitutional alloys for topological research, thermoelectricity, and spintronics, e.g., (Pb,Sn,Mn)Te, (Pb,Sn,Mn)Se, (Pb,Cd)Te, (Ge,Sn)Te, (Pb,Ge)Te, and Pb(Te,Se) - Molecular beam epitaxy (MBE) growth of
IV-VI andII-VI multilayer nanostructures, e.g., (Pb,Sn)Te/CdTe quantum wells and quantum dots for infrared optoelectronics, quantumanti-dot CdTe/PbTe heterostructures for thermoelectricity, and (Ge,Sn,Mn)Te ferromagnetic layers for spintronics