A5011393579- Thermal properties of materials
- Advanced Thermoelectric Materials and Devices
- Thermal Radiation and Cooling Technologies
- Quantum and electron transport phenomena
- Graphene research and applications
- Topological Materials and Phenomena
- Surface and Thin Film Phenomena
- Phase-change materials and chalcogenides
- thermodynamics and calorimetric analyses
- Rare-earth and actinide compounds
Technical University of Denmark
2022-2025
Max Planck Institute for Chemical Physics of Solids
2020-2021
Abstract Interacting electrons confined to their lowest Landau level in a high magnetic field can form variety of correlated states, some which manifest themselves Hall effect. Although such states have been predicted occur three-dimensional semimetals, corresponding response has not yet experimentally observed. Here, we report the observation an unconventional quantum limit bulk semimetal HfTe 5 , adjacent effect single electron band at low fields. The additional plateau-like feature...
Anisotropic heat–conducting materials play crucial roles in designing electronic, optoelectronic, and thermoelectric devices, where temperature thermal stress are important. Despite substantial research efforts, a major obstacle to determining the anisotropic diffusivity tensor polycrystalline systems is need for robust, direct, nondestructive technique distinguish between distinct diffusivities. Here, we demonstrate conceptually unique microscope capable of performing high-resolution local...
To develop materials with higher thermoelectric efficiency, a comprehensive characterization of material properties on the relevant spatial scales is pertinent. In this study, we new method based micro four-point probe (M4PP) to determine thermal diffusivity bulk using phase delay second harmonic voltage. The demonstrated two i.e. skutterudite and bismuth telluride. Individual measurements telluride are characterized by precision better than 9% 12%, mean diffusivities 1.87 ± 0.17 mm2/s 1.14...
Joule heating is a primary phenomenon responsible for increasing temperature in electronic devices, and consequently, decreasing the lifetime performance of devices. However, this unwanted can itself be used as local source heat to map temperature-dependent material properties. Recently, micro four-point probe (M4PP) showed promising potential characterizing coefficient resistance (TCR) Seebeck using resulting from measurement current. Here, we use M4PP estimate micrometer scale, relative...
Itinerant ferromagnets constitute an important class of materials wherein spin-polarization can affect the electric transport properties in nontrivial ways. One such phenomenon is anomalous Hall effect which depends on details band structure as amount crossings valence ferromagnet. Here, we have found extraordinary itinerant ferromagnetic metal LaCrSb3. The rather two-dimensional nature magnetic subunit imparts large anisotropic conductivity 1250 S/cm at 2K. Our investigations suggest that a...
<title>Abstract</title> <bold>Anisotropic heat conducting materials, where flows faster in one direction than another, play crucial roles designing electronic, optoelectronic, and thermoelectric devices, temperature thermal stress are important. Despite significant research efforts, a major obstacle to determining the anisotropic diffusivity tensor polycrystalline systems is need for robust, direct, non-destructive technique distinguish between distinct diffusivities. Here, we demonstrate...
The micro four-point probe (M4PP) technique has become a well-established method for characterizing the electrical properties of materials. However, extra attention must be paid when measuring resistivity thermoelectric materials due to possibility an additional Seebeck voltage. This issue vanishes at sufficiently high frequency, but threshold frequency is substantial small separation between pins probes. Typical M4PP measurements are far from reaching this and their accuracy on severely...
Joule heating is a primary phenomenon responsible for increasing temperature in electronic devices, and consequently, decreasing the lifetime performance of devices. However, this unwanted can itself be used as local source heat to map dependent material properties. Recently, micro four-point probe (M4PP) showed promising potential characterizing coefficient resistance (TCR) Seebeck using resulting from measurement current. Here, we use M4PP estimate micrometer scale, relative profile single...