61 citations · 302 across the 18 of their papers we have counts for
18 papers
Imaging Josephson Vortices on Curved Junctions
Yuita Fujisawa, Anjana Krishnadas, Barnaby R. M. Smith +5
Understanding the nature of vortices in type-II superconductors is crucial for comprehending exotic superconductors and advancing the application of superconducting materials in fu…
Imaging emergent exotic quasiparticle state in a frustrated transition metal oxide
Yuita Fujisawa, Anjana Krishnadas, Chia-Hsiu Hsu +10
The existence of rich Fermiology in anomalous metal phase in exotic superconductors has attracted considerable interests, as exemplified in copper, iron-based, and intermetallic fr…
Anomalous vortex shape in a frustrated superconductor hosting chiral multicomponent order parameters
Yuita Fujisawa, Anjana Krishnadas, Tomonori Nakamura +12
Multicomponent chiral superconductors can host spatially separated superconducting components within a single Abrikosov vortex, leading to unconventional, anisotropic vortex shapes…
Large antiferromagnetic fluctuation enhancement of the thermopower at a critical doping in magnetic semimetal Cr1+dTe2
Atwa Mohamed, Yuita Fujisawa, Takatsugu Onishi +5
Cr1+dTe2 is a self-intercalated transition metal dichalcogenide that hosts tunable electronic filling and magnetism in its semimetallic band structure. Recent angle-resolved photoe…
Widely Tunable Berry curvature in the Magnetic Semimetal Cr1+dTe2
Y. Fujisawa, M. Pardo-Almanza, C. H. Hsu +8
Magnetic semimetals have increasingly emerged as lucrative platforms hosting spin-based topological phenomena in real and momentum spaces. Of particular interest is the emergence o…
Itinerant ferromagnetism mediated by giant spin polarization of metallic ligand band in van der Waals magnet Fe5GeTe2
K. Yamagami, Y. Fujisawa, B. Driesen +15
We investigate near-Fermi-energy (EF) element-specific electronic and spin states of ferromagnetic van der Waals (vdW) metal Fe5GeTe2. The soft x-ray angle-resolved photoemission s…
Evolution of the Fe-3 impurity band state as the origin of high Curie temperature in p-type ferromagnetic semiconductor (Ga,Fe)Sb
Takahito Takeda, Shoya Sakamoto, Kohsei Araki +8
(Ga,Fe)Sb is one of the promising ferromagnetic semiconductors for spintronic device applications because its Curie temperature () is above 300 K when the Fe…
Tailoring Magnetism in Self-intercalated Cr1+δTe2 Epitaxial Films
Y. Fujisawa, M. Pardo-Almanza, J. Garland +13
Magnetic transition metal dichalcogenide (TMD) films have recently emerged as promising candidates to host novel magnetic phases relevant to next-generation spintronic devices. How…
Fermionic Order by Disorder in a van der Waals Antiferromagnet
R. Okuma, D. Ueta, S. Kuniyoshi +11
CeTe3 is a unique platform to investigate the itinerant magnetism in a van der Waals (vdW) coupled metal. Despite chemical pressure being a promising route to boost quantum fluctua…
Three-dimensional electronic structure in ferromagnetic with breathing kagome bilayers
Hiroaki Tanaka, Yuita Fujisawa, Kenta Kuroda +9
A large anomalous Hall effect (AHE) has been observed in ferromagnetic with breathing kagome bilayers. To understand the underlying mechanism for this,…
Structural Modulation in LaO0.9F0.1BiSe2 Single Crystals Revealed by Scanning Tunneling Microscopy/Spectroscopy
N Ishida, S Demura, Y Fujisawa +3
We present scanning tunneling microscopy and spectroscopy measurements on a cleaved surface of the LaO0.9F0.1BiSe2 single crystals. Tunneling spectra show a finite local density of…
Effect of Lead Substitution on LaO0.5F0.5BiS2
S. Otsuki, S. Demura, Y. Sakai +2
We examined Lead (Pb) Substitution effect on a single crystal of a layered superconductor LaO0.5F0.5BiS2. Pb concentration dependence of the lattice constant showed slight anomaly…
Appearance of a Domain Structure and its Electronic states in Iron Doped 1-TaS Observed using Scanning Tunneling Microscopy and Spectroscopy
Yuita Fujisawa, Tatsunari Shimabukuro, Hiroyuki Kojima +5
In this paper, we report on scanning tunneling microscopy and spectroscopy (STM/STS) measurements on iron doped 1-TaFeS. A novel domain structure composed of the…
Observation of supermodulation in LaO0.5F0.5BiSe2 by scanning tunneling microscopy and spectroscopy
Satoshi Demura, Naoki Ishida, Yuita Fujisawa +1
We observed surface and electronic structure of LaO0.5F0.5BiSe2 single crystal by scanning tunneling microscopy/spectroscopy (STM/STS) at 4.2 K. Square lattice composed of Bi atoms…
Enhancement of Tc in BiS2 based superconductors NdO0.7F0.3BiS2 by substitution of Pb for Bi
S. Demura, Y. Fujisawa, S. Otsuki +3
We succeed in enhancement of a superconducting transition temperature (Tc) for NdO0.7F0.3BiS2 single crystal by partial substitution of Pb for Bi. The Tc increases with increasing…
Visualizing the Pt doping effect on surface and electronic structure in Ir_{1-x}Pt_{x}Te_{2} by scanning tunneling microscopy and spectroscopy
Y. Fujisawa, T. Machida, K. Igarashi +7
We report on the Pt doping effect on surface and electronic structure in IrPtTe by scanning tunneling microscopy (STM) and spectrosc…
Checkerboard stripe electronic state on cleaved surface of NdOFBiS probed by scanning tunneling microscope
T. Machida, Y. Fujisawa, M. Nagao +5
We present scanning tunneling microscopy measurements on a cleaved surface of the recently discovered superconductor NdOFBiS with a transition temperature ($T…
Visualization of the effect of structural supermodulation on electronic structure in IrTe by scanning tunneling spectroscopy
T. Machida, Y. Fujisawa, K. Igarashi +7
We report on the scanning tunneling spectroscopy experiments on single crystals of IrTe. A structural supermodulation and a local density-of-states (LDOS) modulation with a w…