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Anderson transition in stoichiometric Fe~2~VAl: high thermoelectric performance from impurity bands by Fabian Garmroudi; Michael Parzer; Alexander Riss; Andrei V. Ruban; Sergii Khmelevskyi; Michele Reticcioli; Matthias Knopf; Herwig Michor; Andrej Pustogow; Takao Mori; Ernst Bauer is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.
What is Anderson transition in stoichiometric Fe~2~VAl: high thermoelectric performance from impurity bands about?
Discovered more than 200 years ago in 1821, thermoelectricity is nowadays of global interest as it enables direct interconversion of thermal and electrical energy via the Seebeck/Peltier effect. In their seminal work, Mahan and Sofo mathematically derived the conditions for ’the best thermoelectric’—a delta-distribution-shaped electronic transport function, where charge carriers contribute to transport only in an infinitely narrow energy interval. So far, however, only approximations to this concept were expected to exist in nature. Here, we propose the Anderson transition in a narrow impurity band as a physical realisation of this seemingly unrealisable scenario. An innovative approach of continuous disorder tuning allows us to drive the Anderson transition within a single sample: variable amounts of antisite defects are introduced in a controlled fashion by thermal quenching from high temperatures. Consequently, we obtain a significant enhancement and dramatic change of the thermoelectric properties from __p__-type to __n__-type in stoichiometric Fe~2~VAl, which we assign to a narrow region of delocalised electrons in the energy spectrum near the Fermi energy. Based on our electr
Who reads Anderson transition in stoichiometric Fe~2~VAl: high thermoelectric performance from impurity bands?
It is typically read by researchers, students, and practitioners in Biochemistry, Genetics and Molecular Biology.
- Author
- Fabian Garmroudi; Michael Parzer; Alexander Riss; Andrei V. Ruban; Sergii Khmelevskyi; Michele Reticcioli; Matthias Knopf; Herwig Michor; Andrej Pustogow; Takao Mori; Ernst Bauer
- Publisher
- Springer Science and Business Media LLC
- Published
- 2022
- Language
- EN
- Field
- Biochemistry, Genetics and Molecular Biology (Life Sciences)