473 citations · 768 across the 12 of their papers we have counts for
12 papers
Atomic-scale visualization of surface-assisted orbital order
Howon Kim, Yasuo Yoshida, Chi-Cheng Lee +6
Orbital-related physics attracts growing interest in condensed matter research, but direct real-space access of the orbital degree of freedom is challenging. Here we report a first…
Dirac fermions in borophene
Baojie Feng, Osamu Sugino, Ro-Ya Liu +14
Honeycomb structures of group IV elements can host massless Dirac fermions with non-trivial Berry phases. Their potential for electronic applications has attracted great interest a…
Compressed sensing in scanning tunneling microscopy/spectroscopy for observation of quasi-particle interference
Yoshinori Nakanishi-Ohno, Masahiro Haze, Yasuo Yoshida +3
We applied a method of compressed sensing to the observation of quasi-particle interference (QPI) by scanning tunneling microscopy/spectroscopy to improve efficiency and save measu…
Experimental verification of the rotational sense and type of chiral spin spiral structure by spin-polarized scanning tunneling microscopy
Masahiro Haze, Yasuo Yoshida, Yukio Hasegawa
We report on experimental verification of the rotational sense and type of homogeneous chiral spin spiral order in a Mn monolayer on a W(110) substrate using spin-polarized scannin…
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…
Electronic and magnetic influences of a stacking fault in cobalt nanoscale islands on the Ag(111) surface
Keiji Doi, Emi Minamitani, Shunji Yamamoto +4
Utilizing spin-polarized scanning tunneling microscopy and spectroscopy, we found coexistence of perpendicularly and in-plane magnetized cobalt nanoscale islands on the Ag(111) sur…
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…
Thermally Assisted Penetration and Exclusion of Single Vortex in Mesoscopic Superconductors
Shi-Zeng Lin, Takahiro Nishio, Lev N. Bulaevskii +2
A single vortex overcoming the surface barrier in a mesoscopic superconductor with lateral dimensions of several coherence lengths and thickness of several nanometers provides an i…
A comparsion of force sensors for atomic force microscopy based on quartz tuning forks and length extensional resonators
Franz J. Giessibl, Florian Pielmeier, Toyoaki Eguchi +2
The force sensor is key to the performance of atomic force microscopy (AFM). Nowadays, most AFMs use micro-machined force sensors made from silicon, but piezoelectric quartz sensor…