Anomalous dephasing scattering time of Zr80Sn20−Fe alloys at low temperature
| Autor: | Subhojyoti Sinha, R.N. Jana, Ajit Kumar Meikap |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Condensed matter physics Mean free path Scattering Dephasing Electron Atmospheric temperature range Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electron localization function 010305 fluids & plasmas Electronic Optical and Magnetic Materials Electrical resistivity and conductivity Scattering rate 0103 physical sciences 010306 general physics |
| Zdroj: | Physica E: Low-dimensional Systems and Nanostructures. 77:7-12 |
| ISSN: | 1386-9477 |
| Popis: | We report the results of a comprehensive study of weak electron localization (WEL) and electron–electron interaction (EEI) effects in disordered Zr80Sn20−xFex alloys. The resistivity in absence of magnetic field shows a minimum at temperature T=Tm and follows ρo5/2T1/2 law within the temperature range 5 K≤T≤Tm, which suggests predominant EEI effect. Magnetoresistivity is positive due to strong spin–orbit interaction. The dephasing scattering time is dominated by the electron–phonon scattering. The electron–phonon scattering rate shows anomalous behavior and obeys the relation τ e − p h − 1 ∝ T 2 l e , where l e is the electron elastic mean free path. The zero temperature scattering time ( τ 0 ) strongly depends on the disorder and its magnitude decreases with increasing disorder resistivity ρ 0 . Such anomalous behavior cannot be explained in terms of existing theories. |
| Databáze: | OpenAIRE |
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