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Laser thermal spectroscopy of highly granular NbN

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)

The temperature dependence of far-infrared transmission gives 2..delta..(O), T/sub c/, and evidence of fluctuations in NbN films. Homogeneous and highly granular (R/sub D'Alembertian/ = 21 000 ..cap omega..) NbN are found to be equally strong coupled. BCS theory predicts a peak in transmission-versus-temperature curves which is observed at a reduced level in a homogeneous sample and vanishes completely in the granular material. The extinction of the peak is ascribed to zero-dimensional fluctuations near T/sub c/.

Research Organization:
Physics Department, Emory University, Atlanta, Georgia 30322
OSTI ID:
5227634
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 25:5; ISSN PRBMD
Country of Publication:
United States
Language:
English