Now showing items 1-8 of 8

    • Bounds on nanoscale nematicity in single-layerFeSe/SrTiO3 

      Huang, Dennis; Webb, Tatiana A.; Fang, Shiang; Song, Can-Li; Chang, Cui-Zu; Moodera, Jagadeesh S.; Kaxiras, Efthimios; Hoffman, Jennifer Eve (American Physical Society (APS), 2016)
      We use scanning tunneling microscopy (STM) and quasiparticle interference (QPI) imaging to investigate the low-energy orbital texture of single-layer FeSe/SrTiO3. We develop a T -matrix model of multiorbital QPI to disentangle ...
    • Dopant clustering, electronic inhomogeneity, and vortex pinning in iron-based superconductors 

      Song, Can-Li; Yin, Yi; Zech, Martin; Williams, Tess; Yee, Michael Manchun; Chen, Gen-Fu; Luo, Jian-Lin; Wang, Nan-Lin; Hudson, E. W.; Hoffman, Jennifer Eve (American Physical Society (APS), 2013)
      We use scanning tunneling microscopy to map the surface structure, nanoscale electronic inhomogeneity, and vitreous vortex phase in the hole-doped superconductor Sr0.75K0.25Fe2As2 with Tc=32 K. We find that the low-T cleaved ...
    • Dumbbell Defects in FeSe Films: A Scanning Tunneling Microscopy and First-Principles Investigation 

      Huang, Dennis; Webb, Tatiana A.; Song, Can-Li; Chang, Cui-Zu; Moodera, Jagadeesh S.; Kaxiras, Efthimios; Hoffman, Jennifer Eve (American Chemical Society (ACS), 2016)
      The properties of iron-based superconductors (Fe-SCs) can be varied dramatically with the introduction of dopants and atomic defects. As a pressing example, FeSe, parent phase of the highest-Tc Fe-SC, exhibits prevalent ...
    • Imaging the Electron-Boson Coupling in Superconducting FeSe Films Using a Scanning Tunneling Microscope 

      Song, Can-Li; Wang, Yi-Lin; Jiang, Ye-Ping; Li, Zhi; Wang, Lili; He, Ke; Chen, Xi; Hoffman, Jennifer Eve; Ma, Xu-Cun; Xue, Qi-Kun (American Physical Society (APS), 2014)
      Scanning tunneling spectroscopy has been used to reveal signatures of a bosonic mode in the local quasiparticle density of states of superconducting FeSe films. The mode appears below Tc as a “dip-hump” feature at energy ...
    • Nanoscale Surface Element Identification and Dopant Homogeneity in the High-\(T_c\) Superconductor \(Pr_xC_{1-x}Fe_2As_2\) 

      Zeljkovic, Ilija; Huang, Dennis; Song, Can-Li; Lv, Bing; Chu, Ching-Wu; Hoffman, Jenny Eve (American Physical Society, 2013)
      We use scanning tunneling microscopy to determine the surface structure and dopant distribution in \(Pr_xCa_{1-x}Fe_2As_2\), the highest-\(T_c\) member of the 122 family of iron-based superconductors. We identify the cleaved ...
    • Nanoscale surface element identification and dopant homogeneity in the high-\(T_{c}\) superconductor \(Pr_xCa_{1−x}Fe_2As_2\) 

      Zeljkovic, Ilija; Huang, Dennis; Song, Can-Li; Lv, Bing; Chu, Ching-Wu; Hoffman, Jennifer Eve (American Physical Society (APS), 2013)
      We use scanning tunneling microscopy to determine the surface structure and dopant distribution in \(Pr_xCa_{1−x}Fe_2As_2\), the highest-Tc member of the 122 family of iron-based superconductors. We identify the cleaved ...
    • Revealing the Empty-State Electronic Structure of Single-Unit-Cell FeSe/SrTiO3 

      Huang, Dennis; Song, Can-Li; Webb, Tatiana A.; Fang, Shiang; Chang, Cui-Zu; Moodera, Jagadeesh S.; Kaxiras, Efthimios; Hoffman, Jennifer Eve (American Physical Society (APS), 2015)
      We use scanning tunneling spectroscopy to investigate the filled and empty electronic states of superconducting single-unit-cell FeSe deposited on SrTiO3(001). We map the momentum-space band structure by combining quasiparticle ...
    • Suppression of Superconductivity by Twin Boundaries In FeSe 

      Hoffman, Jenny Eve; Song, Can-Li; Wang, Yi-Lin; Jiang, Ye-Ping; Wang, Lili; He, Ke; Chen, Xi; Ma, Xu-Cun; Xue, Qi-Kun (American Physical Society, 2012)
      Low-temperature scanning tunneling microscopy and spectroscopy are employed to investigate twin boundaries in stoichiometric FeSe films grown by molecular beam epitaxy. Twin boundaries can be unambiguously identified by ...