Conveners
Section S6: Low-dimensional magnetic materials, molecular magnets and ferrofluids - PART 1
- Sergei Zvyagin (Dresden High Magnetic Field Laboratory (HLD-HZDR))
Section S6: Low-dimensional magnetic materials, molecular magnets and ferrofluids - PART 2
- Ross Colman (Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University)
The ground-state of the $S =1/2$ Ising 2D Triangular Lattice AntiFerroMagnet (ITLAFM) is the go-to example of a frustrated magnet, and was calculated by Wannier over $70$ years ago [1]. In the absence of strong quantum fluctuations, this ground-state is called a classical spin liquid with a large number of energy-degenerate spin configurations that share the minimum energy. It is expected to...
Magnetic van der Waals materials with very weak exchange interaction between magnetically ordered layers represent an interesting intermediate stage between the more explored cases of isotropic bulk-like exchange and the recently intensively studied ideal $2$D limit (monolayer) [1]. We perform a complex investigation of lattice and magnetic excitations induced by external perturbations...
Quantum Spin Liquid (QSL) is a ground state of condensed matter, which is characterized by the absence of magnetic order down to the lowest temperatures along with long-range entanglement of fluctuating spin excitations [1]. Such a state of matter can be promoted by magnetic frustration which prevents the magnetic moments from antiferromagnetic ordering. There are many lattices created by...
The increasing demand for energy harvesting is associated with the current era of big data, when a problem of power supply of numerous distributed sensors must be addressed. A recent research attention has been paid to ferrofluids in the role of a nanogenerator’s active medium. Efforts have been put in development of ferrofluid-based triboelectric nanogenerators and piezoelectric energy...
Accurate modelling of the magnetic properties of powder samples, particularly molecular nanomagnets, requires careful consideration of magnetic field averaging due to the random orientation of the applied field relative to individual crystallites. In this study, we employ the exact diagonalization method to compute key magnetic properties, such as magnetization and magnetic susceptibility,...
Multifunctional molecular materials based on coordination polynuclear multi-site molecules lie at the heart of materials science in view of growing technological challenges dedicated to the progressive miniaturization process and required high operation speed in information processing, quantum computing, and spintronics. Invariably particular interest in research is focused on molecular...
Cu($tn$)Cl$_2$ ($tn$ = C$_3$H$_{10}$N$_2$) represents a quasi-two-dimensional ($2$D) quantum magnet which preserves $2$D features far below the phase transition to the ordered state at $0.55$ K. The coexistence of $2$D and long-range magnetic correlations can be ascribed to the incommensurate modulated crystal structure. The modulation leads to the formation of extremely thin regions with a...
Magnetic order in gapped quantum antiferromagnets can be induced either by magnetic field or pressure. Such transitions are characterized by $z = 2$ or $z = 1$ dynamical critical exponents, determined by the quadratic or linear low-energy dispersion of their spin excitations, respectively. While the field-induced transitions (with the most common realization known as the Bose-Einstein...
We study the spin-$1/2$ Heisenberg antiferromagnet on a diamond-decorated honeycomb lattice and uncover a parameter regime in which the ground state corresponds to a dimer-tetramer crystal. In this regime, low-energy excitations are captured by an effective hard-dimer model on the honeycomb lattice with anisotropic activities. This effective model exhibits thermodynamic behavior consistent...
Recent scientific and technological efforts have increasingly focused on developing novel multifunctional materials whose properties can be dynamically tuned by external stimuli such as light, pressure, and electric or magnetic fields. Among these, organic-inorganic hybrid structures synthesized via simple wet-chemistry processes have emerged as promising candidates. Notably, materials...
