We work on the synthesis and crystal growth, chemical and structural characterization, and physical properties of i.a. transition metal oxides, intermetallics, chalcogenides and pnictides. Properties of interest include high spin polarization, itinerant antiferromagnetism, first order phase transitions, thermoelectricity, large coercitivity, unconventional superconductivity, frustrated magnetism, strong spin-orbital coupling and nontrivial topology. Our pool of facilities includes different types of furnaces working in various atmospheres, thermal analysis, powder and Laue backscattering x-ray diffraction. For a complete list of our facilities, see here.
Our research is aiming at a fundamental understanding of functional properties of novel materials and exploration of their potential for applications. The basis of our research is sample with specific properties; hence, our work is dedicated to synthesis and crystal growth, full characterization and investigation of materials properties. This strategy involves four different, synergistic aspects: (i) development of synthesis and crystal growth routes towards samples with specific properties (ii) advanced characterization of composition, microstructure and crystal structure of our samples (iii) study of local magnetic, electronic and structural order using nuclear magnetic resonance spectroscopy (iv) measurement and analysis of macroscopic physical properties, which is done in close collaboration with in-house partners as well as with national and international collaborators, including numerous neutron and X-ray synchrotron experiments. Our work currently focuses on different classes of emergent materials: intermetallics showing high spin polarization, itinerant antiferromagnetism, first order phase transitions, thermoelectric and hard-magnetic properties, unconventional superconductors, magnetically frustrated materials and materials with strong spin-orbital coupling.
Structure-property relationship of Co2MnSi thin films in response to He+-irradiation
F. Hammerath, R. Bali, R. Huebner, M. R. D. Brandt, S. Rodan, K. Potzger, R. Boettger,
Y. Sakuraba, S. Wurmehl
Magnetic and magnetocaloric properties of the Co2-xMnxB system by experiment and density functional theory
S. Ener, M. Fries, F. Hammerath, I. Opahle, E. Simon, P. Fritsch, S. Wurmehl, H. Zhang,
“Magnetic anisotropy and low-field magnetic phase diagram of the quasi-two-dimensional ferromagnet Cr2Ge2Te6”
“Polymorphic PtBi2 - candidate for topological superconductivity” G. Shipunov, I. Kovalchuk, B. R. Piening, V. Labracherie, A. Veyrat, R. Giraud, J. Dufouleur, S. Shokri, F. Caglieris, C. Hess, D. V. Efremov, B. Büchner, and S. Aswartham.
We grow and characterize single crystals of oxides, sulfides and intermetallic materials exhibiting a variety of properties such as unconventional superconductivity, complex magnetism or ionic conduction. We use the floating zone technique in four optical floating zone furnaces (including a high-pressure mirror furnace reaching 150 bar), the Bridgman and the flux techniques.
This research group led by Jun.-Prof. Dr. Anna Isaeva focuses on the materials aspects of inorganic compounds, primarily, on the explorative synthesis and comprehensive characterization of topologically non-trivial materials. The group is associated to the Chair for Synthesis and Crystal Growth of Quantum Materials, founded in 2019 as a joint appointment between the Technische Universität Dresden and the Leibniz IFW Dresden.
Surface states and Rashba-type spin polarization in antiferromagnetic MnBi2Te4(0001), R. C. Vidal, H. Bentmann, T. R. F. Peixoto, A. Zeugner, S. Moser, C.-H. Min, S. Schatz, K. Kißner, M. Ünzelmann, C. I. Fornari, H. B. Vasili, M. Valvidares, K. Sakamoto, D. Mondal, J. Fujii, I. Vobornik, S. Jung, C. Cacho, T. K. Kim, R. J. Koch, C. Jozwiak, A. Bostwick, J. D. Denlinger, E. Rotenberg, J. Buck, M. Hoesch, F. Diekmann, S. Rohlf, M. Kalläne, K. Rossnagel, M. M. Otrokov, E. V. Chulkov, M. Ruck, A. Isaeva, and F. Reinert, Phys. Rev. B 100, 121104 (2019)
Two- and one-dimensional quantum spin Hall states in stanene-functionalized GaTe and InTe matrices T. V. Menshchikova, I. P. Rusinov, P. Golub, I. Yu. Sklyadneva, R. Heid, A. Isaeva, V. M. Kuznetsov and E. V. Chulkov, J. Mater. Chem. C 7, 7929 (2019)