Thermally Activated Dissipation in Bi2.2Sr2Ca0.8Cu2O8+δ
Year: 1988
Type: article
Abstract: A new dissipation behavior is reported in superconducting ${\mathrm{Bi}}_{2.2}{\mathrm{Sr}}_{2}{\mathrm{Ca}}_{0.8}{\mathrm{Cu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$ for all temperatures below ${T}_{c}$ and all magnetic fields exceeding ${H}_{c1}$. The current-independent electrical resistivity is thermally activated and can be described by an Arrhenius law with a single prefactor and a magnetic-field- and orientation-dependent activation energy ${U}_{0}(H,\ensuremath{\varphi})$. This behavior is markedly different from past observations and will be discussed in terms of flux creep and flux flow. This thermally activated behavior implies a finite resistance at all temperatures and all fields exceeding ${H}_{c1}$ determined by the activation energy as the only parameter.
Source: Physical Review Letters
Institution: AT&T (United States)
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2097399225