A Frustrated Antipolar Phase Analogous to Classical Spin Liquids.

The study of magnetic frustration in classical spin systems is motivated by the prediction and discovery of classical spin liquid states. These uncommon magnetic phases are characterized by a massive degeneracy of their ground state implying a finite magnetic entropy at zero temperature. While the classical spin liquid state is originally predicted in the Ising triangular lattice antiferromagnet in 1950, this state has never been experimentally observed in any triangular magnets.

Formation of Domains within a Lower-to-Higher Symmetry Structural Transition in CrI.

CrI represents one of the most important van der Waals systems on the route to understanding 2D magnetic phenomena. Being arranged in a specific layered structure, it also provides a unique opportunity to investigate structural transformations in dimension-confined systems. CrI is dimorphic and possesses a higher symmetry low-temperature phase, which is quite uncommon.

Crystal structure evolution in the van der Waals vanadium trihalides.

Most transition-metal trihalides are dimorphic. The representative chromium-based triad, CrCl, CrBr, CrI, is characterized by the low-temperature (LT) phase adopting the trigonal BiI-type while the structure of the high-temperature (HT) phase is monoclinic of AlCltype (2/). The structural transition between the two crystallographic phases is of the first-order type with large thermal hysteresis in CrCland CrI.

Pressure induced superconductivity in a CeRhSisingle crystal-the high pressure study.

Pressure induced superconductivity in non-centrosymmetric CeRhSiand CeIrSicompounds has attracted significant attention of the scientific community since its discovery 15 years ago. Up-to-date, all reported experimental results were obtained employing the hybrid-cylinder piston pressure cells with a maximum reachable pressure of 3 GPa. Present study focuses on the superconducting state at higher, so far unreported, pressures using the Bridgman anvil cell and a CeRhSisingle crystal synthesized by the Sn-true-flux method.

Spectroscopic Studies on the Metal-Insulator Transition Mechanism in Correlated Materials.

The metal-insulator transition (MIT) in correlated materials is a novel phenomenon that accompanies a large change in resistivity, often many orders of magnitude. It is important in its own right but its switching behavior in resistivity can be useful for device applications. From the material physics point of view, the starting point of the research on the MIT should be to understand the microscopic mechanism.