Origin of Superconductivity in Boron-doped Diamond
K. -W. Lee, W. E. Pickett
Abstract
Superconductivity of boron-doped diamond, reported recently at Tc=4 K, is investigated exploiting its electronic and vibrational analogies to MgB2. The deformation potential of the hole states arising from the C-C bond stretch mode is 60% larger than the corresponding quantity in MgB2 that drives its high Tc, leading to very large electron-phonon matrix elements. The calculated coupling strength λ~ 0.5 leads to Tc in the 5-10 K range and makes phonon coupling the likely mechanism. Higher doping should increase Tc somewhat, but effects of three dimensionality primarily on the density of states keep doped diamond from having a Tc closer to that of MgB2.
Create a lesson
Related papers
Constraining the Superconducting Gap of Monolayer FeSe/SrTiO3 via Statistical Analysis and Tip-Height-Dependent Tunneling Spectroscopy
Dongwon Shin, Xiyou Peng, Kaleb McClure et al.
Acoustic damping limits superfluid helium as a thermal bath for mechanical resonators
Yunhu Huang, Mehri Ebrahimi, Alireza Rashedi et al.
Superinsulation, electric confinement in condensed matter
M. Cristina Diamantini, Carlo A. Trugenberger
Observation of Superconductivity in a Cu-Rich High-Entropy Alloy
Arumugam Sonachalam
Imaging the Current Distribution in Superconducting Transition-Edge Sensors with Scanning SQUID Microscopy
Samantha Walker, Austin Kaczmarek, Douglas A. Bennett et al.
Asymmetric Little--Parks Oscillations as a Probe of Coupled Pairing Channels in Surface-Superconducting PtBi2PtBi2
Yuriy Yerin, Stefan-Ludwig Drechsler, Carsten Timm et al.