Anomalous Thickness Dependence of the Vortex Pearl Length in Few-Layer NbSe2
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866912261085331456 |
|---|---|
| author | Fridman, Nofar Feld, Tomer Daniel Noah, Avia Zalic, Ayelet Markman, Maya Devidas, T. R Zur, Yishay Grynszpan, Einav Gutfreund, Alon Keren, Itay Vakahi, Atzmon Remennik, Sergei Watanabe, Kenji Taniguchi, Takashi Huber, Martin Emile Aleiner, Igor Steinberg, Hadar Agam, Oded Anahory, Yonathan |
| author_facet | Fridman, Nofar Feld, Tomer Daniel Noah, Avia Zalic, Ayelet Markman, Maya Devidas, T. R Zur, Yishay Grynszpan, Einav Gutfreund, Alon Keren, Itay Vakahi, Atzmon Remennik, Sergei Watanabe, Kenji Taniguchi, Takashi Huber, Martin Emile Aleiner, Igor Steinberg, Hadar Agam, Oded Anahory, Yonathan |
| contents | The coexistence of multiple types of orders is a common thread in condensed matter physics and unconventional superconductors. The nature of superconducting orders may be unveiled by analyzing local perturbations such as vortices. For thin films, the vortex magnetic profile is characterized by the Pearl-length Λ, which is inversely proportional to the 2D superfluid density; hence, normally, also inversely proportional to the film thickness, d. Here we employ the scanning SQUID-on-tip microscopy to measure Λ in NbSe2 flakes with thicknesses ranging from N=3 to 53 layers. For N>10, we find the expected dependence Λ{\varpropto}1/d. However, six-layer films show a sharp increase of Λ deviating by a factor of three from the expected value. This value remains fixed for N=3 to 6. This unexpected behavior suggests the competition between two orders; one residing only on the first and last layers of the film while the other prevails in all layers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_03815 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Anomalous Thickness Dependence of the Vortex Pearl Length in Few-Layer NbSe2 Fridman, Nofar Feld, Tomer Daniel Noah, Avia Zalic, Ayelet Markman, Maya Devidas, T. R Zur, Yishay Grynszpan, Einav Gutfreund, Alon Keren, Itay Vakahi, Atzmon Remennik, Sergei Watanabe, Kenji Taniguchi, Takashi Huber, Martin Emile Aleiner, Igor Steinberg, Hadar Agam, Oded Anahory, Yonathan Superconductivity Strongly Correlated Electrons The coexistence of multiple types of orders is a common thread in condensed matter physics and unconventional superconductors. The nature of superconducting orders may be unveiled by analyzing local perturbations such as vortices. For thin films, the vortex magnetic profile is characterized by the Pearl-length Λ, which is inversely proportional to the 2D superfluid density; hence, normally, also inversely proportional to the film thickness, d. Here we employ the scanning SQUID-on-tip microscopy to measure Λ in NbSe2 flakes with thicknesses ranging from N=3 to 53 layers. For N>10, we find the expected dependence Λ{\varpropto}1/d. However, six-layer films show a sharp increase of Λ deviating by a factor of three from the expected value. This value remains fixed for N=3 to 6. This unexpected behavior suggests the competition between two orders; one residing only on the first and last layers of the film while the other prevails in all layers. |
| title | Anomalous Thickness Dependence of the Vortex Pearl Length in Few-Layer NbSe2 |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2503.03815 |