We calculate the line tension of a tilted stack of magnetically coupled two-dimensional pancake vortices held at the ends and show that the line tension becomes negative at an angle of 52°. We further calculate the tilt modulus at arbitrary angle θ and show that it becomes negative starting at the same angle 52° for long wavelengths. A structure for the vortex line is given, which is shown to have a lower energy.
|Number of pages||5|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 1996|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics