473 citations · 853 across the 12 of their papers we have counts for
6 papers · 1 filter
Spectroscopic signature of the Stark-shifted Tamm-type surface state of La(0001)
Dominik Schreyer, Howon Kim, Roland Wiesendanger
We have studied the Tamm-type surface state of La(0001) by tunneling spectroscopy within a wide range of tunneling currents from 0.1 nA to 8000 nA, thereby tuning the electric-fiel…
Site-dependent conduction channel transmission in atomic-scale superconducting junctions
Howon Kim, Yukio Hasegawa
Using scanning tunneling microscopy, we reproducibly obtained electrical conductance spectra of superconductor- superconductor atomic point contacts formed on various atomic sites…
Site-dependent evolution of electrical conductance from tunneling to atomic point contact
Howon Kim, Yukio Hasegawa
Using scanning tunneling microscopy (STM), we investigated the evolution of electrical conductance between a Pb tip and Pb(111) surface from tunneling to atomic point contact at a…
Disorder-induced suppression of superconductivity in the Si(111)-()-In surface: Scanning tunneling microscopy study
Shunsuke Yoshizawa, Howon Kim, Yukio Hasegawa +1
The critical effect of disorder on the two-dimensional (2D) surface superconductor Si(111)-()-In is clarified by comparing two regions with different degree…
Imaging Josephson Vortices on the Surface Superconductor Si(111)-(root7xroot3)-In using a Scanning Tunneling Microscope
Shunsuke Yoshizawa, Howon Kim, Takuto Kawakami +5
We have studied the superconducting Si(111)-(root7xroot3)-In surface using a 3He-based low-temperature scanning tunneling microscope (STM). Zero-bias conductance (ZBC) images taken…
Enhancement and termination of the superconducting proximity effect due to atomic-scale defects visualized by scanning tunneling microscopy
Howon Kim, Shi-Zeng Lin, Matthias J. Graf +2
Using low-temperature scanning tunneling microscopy and spectroscopy, we have studied the proximity effect at the interfaces between superconducting Pb island structures and metall…