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← ScienceWhich behavior occurs when increasing isotopic mass in superconductors?
A)Decrease in the critical temperature✓
B)Increase in the critical temperature
C)Unaffected superconducting transition temperature
D)Increased electron-phonon coupling strength
💡 Explanation
Isotopic mass increases will decrease the superconducting critical temperature because the electron-phonon interaction strength mediating Cooper pair formation relies on lattice vibrations; this exemplifies the Isotope Effect. Therefore, decreased critical temperature occurs with heavier isotopes rather than alternatives with contrary thermal behavior.
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