1.

Distinct pseudogap and quasiparticle relaxation dynamics in the superconducting state of nearly optimally doped SmFeAsO(0.8)F(0.2) single crystals

We investigated the quasiparticle relaxation and low-energy electronic structure in a near-optimally doped pnictide superconductor SmFeAsO0,8F0,2. Multiple relaxation processes are evident, with distinct superconducting state quasiparticle recombination dynamics exhibiting a T-dependent superconducting (SC) gap, and a clear "pseudogap" (PG)-like feature indicating the existence of temperature-independent gap above Tc. Pump photon energy dispersion indicates that SC and PG components originate from two distinct relatively weakly coupled electronic subsystems.

COBISS.SI-ID: 22500391

2.

Inorganic molecular wires: physical and functional properties of transition metal chalco-halide polymers

The rapid development of nanotechnology has lead to demands on new one-dimensional materials with new properties. Carbon nanotubes have received most attention, followed by nanowires of very different kinds. Most recently inorganic molecular wires –particularly Mb-halide or chalcogenide cluster polymers– have emerged as a new type of one-dimensional materials with remarkable molecular-scale functionality. These transition metal chalco-halide molecular wires are unique in terms of structure and molecular properties, setting them apart from nanowires and nanotubes discovered in recent years.

COBISS.SI-ID: 22441255

3.

Fine structure in the electronic density of states near the Fermi energy of Al-Ni-Co

Influence of the electronic density of states (DOS) on the relaxation in a decagonal quasicrystal was also investigated. A fast initial diffusion of hot carriers into the sample enhanced by the presence of the wide pseudogap was observed. We found also that DOS is further reduced in vicinity (~13 meV) of the Fermi energy.

COBISS.SI-ID: 22467111

4.

Inorganic molecular-scale MoSI nanowire-gold nanoparticle networks exhibit self-organized critical self-assembly. Nano lett. (Print)

We investigate for the first time the topological characteristics of large molecular-scale inorganic networks self-assembled in solution using the unique sulfur-bonding chemistry of conducting MoSI molecular wires and gold nanoparticles (GNPs). The network self-assembly is shown to display power-law distribution of graph edges, indicating an intrinsic tendency to self-organize into scale-invariant critical state, without any external control parameter. We discuss the electronic transport properties of such networks particularly with regard to the possibility of data processing.

COBISS.SI-ID: 22513959

5.

Dynamics of photoinduced charge-density-wave to metal phase transition in K(0.3)MoO3.

We present the first systematic studies of the photoinduced phase transition from the ground charge density wave (CDW) state to the normal metallic state in the prototype quasi-1D CDW system K0.3MoO3. Ultrafast nonthermal CDW melting is achieved at the absorbed energy density that corresponds to the electronic energy difference between the metallic and CDW states. The results imply that on the subpicosecond time scale when melting and subsequent initial recovery of the electronic order takes place the lattice remains unperturbed.