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STUDY ON THE THERMOPOWER AND RESISTIVITY OF A NEW SUPERCONDUCTOR MgB2
- Source :
- Acta Physica Sinica. 50:1197
- Publication Year :
- 2001
- Publisher :
- Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences, 2001.
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Abstract
- The temperature-dependent thermopower and resistivity of MgB2 were measured.In the range of 100—300K, the thermopower presents positive nearly linear temperature dependence,indicating that the charge carrier is hole and it is consistent with the energy band pattern.In contrast,the resistivity follows T2 relationship in the same temperature range.Below 100K,thermopower and resistivity change their temperature dependence.The thermopower presents a hump between the superconducting transition temperature Tc (zero resistance,36.6K) and 100K.It has the characteristic of the phonon drag,indicating the strong electron-phonon interaction.Some important parameters are estimated according to experimental results,such as Fermi energy EF and energy band width.
- Subjects :
- Superconductivity
Range (particle radiation)
Materials science
Condensed matter physics
General Physics and Astronomy
Fermi energy
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Condensed Matter::Materials Science
Electrical resistivity and conductivity
Condensed Matter::Superconductivity
Seebeck coefficient
Condensed Matter::Strongly Correlated Electrons
Charge carrier
Electronic band structure
Phonon drag
Subjects
Details
- ISSN :
- 10003290
- Volume :
- 50
- Database :
- OpenAIRE
- Journal :
- Acta Physica Sinica
- Accession number :
- edsair.doi...........0039c98d804efa92d4ea75caa004d231