https://scholars.lib.ntu.edu.tw/handle/123456789/606477
標題: | Abrikosov vortex corrections to effective magnetic field enhancement in epitaxial graphene | 作者: | St. Marie L.R Liu C.-I Hu I.-F Hill H.M Saha D Elmquist R.E CHI-TE LIANG Newell D.B Barbara P Hagmann J.A Rigosi A.F. |
關鍵字: | Graphene; Low temperature effects; Magnetic fields; Niobium compounds; Superconducting devices; Superconducting materials; Temperature; Titanium compounds; Abrikosov vortices; Device fabrications; Ginzburg Landau theory; London penetration depth; Low-temperature applications; Magnetic field enhancements; Transient phenomenon; Type II superconductors; Vortex flow | 公開日期: | 2021 | 卷: | 104 | 期: | 8 | 來源出版物: | Physical Review B | 摘要: | Here, we report the effects of enhanced magnetic fields resulting from type-II superconducting NbTiN slabs adjacent to narrow Hall bar devices fabricated from epitaxial graphene. Observed changes in the magnetoresistances were found to have minimal contributions from device inhomogeneities, magnet hysteresis, electron density variations along the devices, and transient phenomena. We hypothesize that Abrikosov vortices, present in type-II superconductors, contribute to these observations. By determining the London penetration depth, coupled with elements of Ginzburg-Landau theory, one can approximate an upper bound on the effect that vortex densities at low fields (<1T) have on the reported observations. These analyses offer insights into device fabrication and how to utilize the Meissner effect for any low-field and low-temperature applications using superconductors. ? 2021 American Physical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114151278&doi=10.1103%2fPhysRevB.104.085435&partnerID=40&md5=0026f8b10b09c3383635221d19b74b74 https://scholars.lib.ntu.edu.tw/handle/123456789/606477 |
ISSN: | 24699950 | DOI: | 10.1103/PhysRevB.104.085435 |
顯示於: | 物理學系 |
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