Fishtail and vortex dynamics in the Ni-doped iron pnictide BaFe1.82Ni0.18As2

Scanning tunneling spectroscopy and vortex imaging in the iron pnictide superconductor BaFe1.8Co0.2As2.

We present an atomic resolution scanning tunneling spectroscopy study of superconducting BaFe1.8Co0.2As2 single crystals in magnetic fields up to 9 T. At zero field, a single gap with coherence peaks at Delta=6.25 meV is observed in the density of states. At 9 and 6 T, we image a disordered vortex lattice, consistent with isotropic, single flux quantum vortices. Vortex locations are uncorrelate...

Josephson effect between electron-doped and hole-doped iron pnictide single crystals

single crystals Xiaohang Zhang, Shanta R. Saha, Nicholas P. Butch, Kevin Kirshenbaum, Johnpierre Paglione, Richard L. Greene, Yong Liu, Liqin Yan, Yoon Seok Oh, Kee Hoon Kim, and Ichiro Takeuchi Department of Physics and CNAM, University of Maryland, College Park, Maryland 20742, USA Department of Physics and Astronomy, CSCMR & FPRD, Seoul National University, Seoul 151-747, Republic of Korea D...

Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron-Pnictide High-Tc Superconductors

Last year, 22 years after the discovery of high-Tc superconductivity in the cuprates, superconductivity was discovered up to 55K in a second family of materials: the iron-pnictides. This new discovery has generated tremendous excitement for several reasons. First, there is hope that the iron-pnictides will finally provide the foil necessary to understand the enormous yet puzzling body of resear...

Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron-Pnictide High-Tc Superconductors

the study of bright and surface discrete cavity solitons dynamics in saturable nonlinear media

امروزه سالیتون ها بعنوان امواج جایگزیده ای که تحت شرایط خاص بدون تغییر شکل در محیط منتشر می-شوند، زمینه مطالعات گسترده ای در حوزه اپتیک غیرخطی هستند. در این راستا توجه به پدیده پراش گسسته، که بعنوان عامل پهن شدگی باریکه نوری در آرایه ای از موجبرهای جفت شده، ظاهر می گردد، ضروری است، زیرا سالیتون های گسسته از خنثی شدن پراش گسسته در این سیستم ها بوسیله عوامل غیرخطی بوجود می آیند. گسستگی سیستم عامل...