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RESEARCH
Explorative quantum materials
Our experimental group focuses on the design and synthesis of quantum materials with tailored quasiparticle interactions to achieve targeted macroscopic properties. We investigate bulk crystalline solids, particularly layered van der Waals materials and their intercalated and exfoliated derivatives, to understand and leverage unconventional magnetic, electronic, and topological phenomena. By identifying and utilizing chemical and structural tuning knobs, we optimize quantum materials to bridge fundamental research with practical applications in quantum technology, magneto-optoelectronics, and energy-related fields. We employ a versatile set of crystal growth techniques: chemical vapor transport, flux growth, inorganic synthesis in inert atmosphere, floating zone melting, Bridgman technique, arc melting. We characterize our materials by powder and single-crystal X-ray diffraction, neutron diffraction, energy-dispersive X-ray spectroscopy, DC/AC magnetometry, specific heat and four-probe electrical conductivity measurements.
Contact
Dr. Anna Isaeva | a.isaeva@uva.nl
Dr. Anna Isaeva | a.isaeva@uva.nl
Designer topological quantum materials
We investigate novel quantum materials exhibiting robust topological states, including topological insulators, semimetals, and superconductors. Through precise control of chemical composition, structural arrangement, and innovative intermixing engineering, we experimentally realize theoretical predictions and explore unique electronic and magnetic phenomena. For instance, one of our goals is to maximize magnetic ordering temperatures in magnetic topological insulators, and achieve stable ferromagnetic states essential for the quantum anomalous Hall effect.
Correlated electronic and magnetic systems
We study materials characterized by strong electronic correlations, exotic magnetic orders including magnetic frustration and Kitaev interactions. Integrating advanced inorganic synthesis, detailed electron transport, magnetic characterization, and crystallographic analysis, we uncover how microscopic quasiparticle interactions drive emergent macroscopic functionalities.
Quantum materials with reduced dimensionality
We explore emergent properties of layered quantum materials in reduced dimensions by applying electrochemical intercalation and topochemical transformations to produce nanoscale flakes and intercalated derivatives. These 2D systems, including quantum spin Hall insulators, are functionalized into heterostructures, offering new possibilities for quantum devices, magneto-optical applications, and energy-efficient technologies.
Innovative crystal growth and comprehensive characterization
We employ diverse crystal growth methods such as chemical vapor transport, flux growth, floating zone melting and solution-based techniques to produce high-quality single crystals of chalcogenides, halides and oxides. We develop tailored synthetic approaches for new compounds using the results of thermal analysis and high-temperature X-ray diffraction as input. We perform comprehensive characterization of the obtained samples by combining high-resolution structural and compositional studies by diffraction methods (X-rays, neutrons, electron microscopy), energy-dispersive X-ray spectroscopy, electron transport, bulk magnetization and specific heat studies. The obtained broad scope of data helps us to establish accurate structure-property relationships for quantum materials and to produce new optimized material candidates.