With the help of nuclear magnetic resonance experiments we demonstrated that both known Cs3C60 polymorphs have insulating ground state under ambient pressure conditions. We showed that both critical temperatures follow universal parameter, that depends on the electron correlation energy.
COBISS.SI-ID: 23639591
Members of the Langasite family, RE3Ga5SiO14 (RE – rare earth), represent the first realization of the kagomé spin lattice in the limit of classical spins, based on large rare-earth moments. A. Zorko and his collaborators have been investigating this issue via local-probe techniques, including nuclear magnetic resonance and muon spin relaxation. They have showed that for Kramers ions (Nd3+) a ground state with spin-liquid characteristics occurs. This state is highly susceptible to moderate magnetic fields, which drastically suppress magnetic fluctuations.
COBISS.SI-ID: 23389991
Breaking of the average cubic symmetry was detected via quadrupole-perturbed NMR of 7Li nuclei in a perovskite system KTL, at temperatures 150 K-400 K high above the nominal glass transition temperature at about 50 K. The splitting of satellite transitions, the presence of which signifies the broken symmetry, strongly depends on temperature. Comparison of the results of point-charge and LDA theoretical models and temperature dependences of the satellite splitting provides for the determination of preferential Li-Li configurations.
COBISS.SI-ID: 24213287
We present an analytical model of the temperature-dependent electrical resistivity and the thermoelectric power of heavy-fermion systems that reproduces the maximum in and the minimum in . The model is based on the quantum transport theory of slow charge carriers, where the velocity of heavy electrons is low due to their large effective mass m*. The theory is applied to the experimental and data of the recently discovered heavy-fermion system YbCu4.25, belonging to the class of giant-unit-cell complex metallic alloys.
COBISS.SI-ID: 23868967
By utilizing a high resolution calorimeter we show via direct measurements the existence of the large electrocaloric effect in perovskite and polymeric ferroelectric materials. We show that the nature of the thermomechanical response in the main-chain liquid crystal elastomers can be controlled by the crosslinking temperature. We successfully stabilized the liquid crystal third blue phase in a broad temperature range exceeding 20 K by adding the CdSe nanoparticles with functionalized surface.
COBISS.SI-ID: 24060199