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On the possibility of a phonon mediated transport anomaly in MgB2 under compression
- Source :
- Solid State Communications. 135:285-289
- Publication Year :
- 2005
- Publisher :
- Elsevier BV, 2005.
-
Abstract
- Results of electrical resistance measurements on MgB 2 at ambient temperature up to 25 GPa are presented. An abrupt reduction of nearly 30% in resistance around 18 GPa is observed. Band structure calculations in the presence of a frozen-in distortion of the E 2g phonon mode reveal that one of the closed Fermi sheets corresponding to the σ-band opens along the Γ – A direction at this pressure. It is suggested that the anomaly observed in the resistance is due to this phonon mediated electronic topological transition (ETT).
- Subjects :
- Condensed matter physics
Phonon
Chemistry
General Chemistry
Condensed Matter Physics
Compression (physics)
Condensed Matter::Materials Science
Electrical resistance and conductance
Electrical resistivity and conductivity
Condensed Matter::Superconductivity
Distortion
Materials Chemistry
Condensed Matter::Strongly Correlated Electrons
Anomaly (physics)
Electronic band structure
Fermi Gamma-ray Space Telescope
Subjects
Details
- ISSN :
- 00381098
- Volume :
- 135
- Database :
- OpenAIRE
- Journal :
- Solid State Communications
- Accession number :
- edsair.doi...........d522a488b18a02047366ac8d9c12b225