Superconducting state properties of a d-wave superconductor with mass anisotropy
| dc.creator | Xu, Ji-Hai | |
| dc.creator | Ren, Yong | |
| dc.creator | Ting, C. S. | |
| dc.date | 1995-11-27 | |
| dc.date.accessioned | 2026-07-07T03:08:02Z | |
| dc.date.available | 2026-07-07T03:08:02Z | |
| dc.description | YBa$_2$Cu$_3$O$_7$ (YBCO) exhibits a large anisotropy between the $a$ and $b$ axes in the CuO$_2$ planes because of the presence of CuO chains. In order to account for such an anisotropy we develop a Ginzburg-Landau (GL) theory for an anisotropic d-wave superconductor in an external magnetic field, based on an anisotropic effective mass approximation within CuO$_2$ planes. The anisotropic parameter $λ=m_x/m_y$, where $m_x$ ($m_y$) is the effective mass in the $x$ ($y$) direction, is found to have significant physical consequences: In the bulk case, there exist both the $s$- and $d$-wave order parameters with the same transition temperature, as long as $λ\ne 1$. The GL equations are also solved both analytically and numerically for the vortex state, and it is shown that both the $s$- and $d$-wave components show a two-fold symmetry, in contrast to the four-fold symmetry around the vortex, as expected for the purely $d$-wave vortex. With the deviation of $λ$ from unity, the opposite winding between the $s$- and $d$-wave components observed in the purely $d$-wave case is gradually taken over by the same winding number. The vortex lattice is found to have oblique structure in a wide temperature range with the precise shape depending on the anisotropy. | |
| dc.description | 16 pages, latex, 11 figures availabe on request | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9511130 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9511130 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/27404 | |
| dc.subject | Condensed Matter | |
| dc.title | Superconducting state properties of a d-wave superconductor with mass anisotropy | |
| dc.type | text |