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Thermodynamic determination of the electron-phonon coupling strength in YBa2Cu3O7−δ (1994)

Reeves, Mark E. ; Kresin, Vladimir Z. ; Wolf, Stuart A.

Springer

Journal of superconductivity 7 (1994), S. 257-259

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ISSN: 1572-9605

Keywords: Cu-O planes ; Cu-O chains ; electron-phonon coupling ; specific heat

Source: Springer Online Journal Archives 1860-2000

Topics: Electrical Engineering, Measurement and Control Technology , Physics

Notes: Abstract The relative enthalpy of YBa2Cu3O7−δ has been measured between the temperatures 273 and 700 K. From these data, we find that the electronic contribution to the specific heat is linear in temperature with a Sommerfeld constant of 25±3 mJ/mole. K2. We analyze the data to show that the normal state of YBa2Cu3O7−δ is described by two conduction bands and strong electron-phonon coupling. The electron-phonon coupling is, in fact, sufficient to account for the highT c in YBa2Cu3O7−δ .

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00730407

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