Término solicitado: DIETSCHE, WERNER/(22)
2 Registro/s encontrado/s en CAT+NORMA
| Tipo de Docum.: | artículo |
| Título: | Thermoelectricity in Quantum-Hall Corbino structures |
| Autor: | Real, Mariano A.; Gresta, Daniel; Reichl, Christian; Weis, Jürgen; Tonina, Alejandra; Giudici, Paula; Arrachea, Liliana; Wegscheider, Werner; Dietsche, Werner |
| Título Ser./Col.: | Physical Review Applied, 14 |
| Autor Inst. Ser./Col.: | American Physical Society. US |
| Idioma: | eng |
| Datos de Edición: | s.l. American Physical Society. 2020. |
| Pág./Vol.: | 8p. |
| Descriptores: | Termoelectricidad; Estructuras; Electrodinámica cuántica; Voltaje; Conductividad eléctrica; Electrones; Fonones; Enfriamiento; Mediciones; Campo magnético |
| Resumen: | We measure the thermoelectric response of Corbino structures in the quantum Hall effect regime and compare it with a theoretical analysis. The measured thermoelectric voltages are qualitatively and quantitatively simulated based upon the independent measurement of the conductivity indicating that they originate predominantly from the electron diffusion. Electron-phonon interaction does not lead to a phonon-drag contribution in contrast to earlier Hall-bar experiments. This implies a description of the Onsager coefficients on the basis of a single transmission function, from which both thermovoltage and conductivity can be predicted with a single fitting parameter. It furthermore let us predict a figure of merit for the efficiency of thermoelectric cooling which becomes very large for partially filled Landau levels (LL) and high magnetic fields. |
 Ver Documento
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Trabajo de INTI |
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URL: |
https://arxiv.org/abs/2003.01748 |
| Tipo de Docum.: | artículo |
| Título: | Thermoelectric cooling properties of a quantum Hall Corbino device |
| Autor: | Mateos, Juan Herrera; Real, Mariano A.; Reichl, Christian; Tonina, Alejandra; Wegscheider, Werner; Dietsche, Werner; Arrachea, Liliana |
| Título Ser./Col.: | Physical Review B, 103 |
| Idioma: | eng |
| Datos de Edición: | s.l. arXiv. 2021. |
| Pág./Vol.: | 10p. |
| Descriptores: | Termoelectricidad; Enfriamiento; Electrodinámica cuántica; Performance; Mediciones |
| Resumen: | We analyze the thermoelectric cooling properties of a Corbino device in the quantum Hall regime on the basis of experimental data of electrical conductance. We focus on the cooling power and the coefficient of performance within and beyond linear response. Thermovoltage measurements in this device reported in Phys. Rev. Applied, 14 034019 (2020) indicated that the transport takes place in the diffusive regime, without signatures of effects due to the electron-phonon interaction in a wide range of temperatures and filling factors. In this regime, the heat and charge currents by electrons can be described by a single transmission function. We infer this function from experimental data of conductance measurements and we calculate the cooling power and the coefficient of performance for a wide range of filling factors and temperatures, as functions of the thermal and electrical biases. We predict an interesting cooling performance in several parameter regimes. |
| Ver Documento
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Trabajo de INTI |
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URL: |
https://arxiv.org/abs/2012.12456 |
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