Imaging of confined vortex matter as a probe for a superconducting order parameter with nodes

Datum

21.03.2024

Zeit

15:00 - 16:00

Sprecher

Dr. Yanina Fasano

Zugehörigkeit

Low Temperatures Lab & Instituto Balseiro, Centro Atómico Bariloche, Argentina

Sprache

en

Hauptthema

Materialien

Host

Rita Taubert

Beschreibung

Direct probes for nodes in the superconducting order parameter of novel compounds are highly desirable since it helps in a rapid development of possible applications of the material. Vortex imaging with scanning tunnelling microscopy is one direct probe for anisotropic order parameter since in most anisotropic superconductors the spectroscopic halo of vortices is elongated, but this probe is limited to the high magnetic fields range. In the case of low and intermediate fields, direct imaging of the magnetic halo of vortices can be performed by several techniques based in the detection on changes of the local field gradient entailed by a vortex. Nevertheless, in many superconductors with anisotropic order parameters the shape of vortices is not necessarily observed as deformed using these magnetic imaging techniques. Thus, finding another direct probe for anisotropic order parameters applicable in low as well as high fields would be most valuable. In this talk I will present one probe based in the experimental observation of changes in the structural properties of vortex matter induced by the confinement in micron-sized samples due to the material presenting nodes in the order parameter.

Links

• Seminars at the IFW

Letztmalig verändert: 21.03.2024, 07:38:04