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← ScienceWhich mechanism hinders achieving superconductivity at higher temperatures?
A)Stronger phonon-mediated electron pairing
B)Enhanced electron-electron repulsion✓
C)Increased superconducting coherence length
D)Reduced isotope effect exponent
💡 Explanation
Enhanced electron-electron repulsion inhibits higher temperature superconductivity because Cooper pair formation is suppressed by increased Coulomb repulsion, therefore, higher kinetic energy overwhelms weak attractive phonon interactions, rather than enabling it because lower temperature is conductive medium.
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