Our main comment is that the data at low temperatures of Kube et al. [Phys. Rev. B 88, 085206 (2013)PRBMDO1098-012110.1103/PhysRevB.88.085206] and those of Shimizu et al. [Phys. Rev. Lett. 98, 095901 (2007)PRLTAO0031-900710.1103/PhysRevLett.98.095901] may not have been due to intrinsic vacancies but rather to extrinsic vacancies generated at carbon and/or vacancy clusters, depending on the specimens used.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2014 Sep 24|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics