149 citations · 374 across the 16 of their papers we have counts for
16 papers
Robust topological surface states in skyrmion-host magnets Eu(Ga,Al)4: evidence for dual topology
Yuki Arai, Kosuke Nakayama, Takemi Kato +10
The interplay between real-space topology such as magnetic skyrmions and momentum-space topology characterized by topological surface states (TSSs) is predicted to realize novel ph…
Type-I and Type-II Saddle Points and a Topological Flat Band in a Bi-Pyrochlore Superconductor CsBi2
Yusei Morita, Yongkai Li, Yu-Hao Wei +12
The divergence of the electron density of states (DOS) plays an important role in enhancing many-body interactions and inducing various quantum phases in low-dimensional systems. H…
Interatomic spin-orbit interaction in a -orbital helical atomic chain
Takemitsu Kato, Yasuhiro Utsumi, Ora Entin-Wohlman +1
We derive the interatomic spin-orbit interaction (SOI) from a helical atomic chain composed of -orbitals with intra-atomic SOI, which exhibits a helical state--a potential origi…
Experimental electronic structure of the mineral superconductor covellite CuS
Alexandre Antezak, Takemi Kato, Pedro Rezende Gonçalves +5
Covellite (CuS) is the first known natural mineral superconductor. Despite its simple chemical formula, covellite exhibits a rich crystal structure at the origin of several remarka…
Evolution of Band Structure in a Kagome Superconductor Cs(V1-xCrx)3Sb5: Toward Universal Understanding of CDW and Superconducting Phase Diagrams
Shuto Suzuki, Takemi Kato, Yongkai Li +10
Kagome superconductors AV3Sb5 (A = K, Rb, Cs) exhibit a characteristic superconducting and charge-density wave (CDW) phase diagram upon carrier doping and chemical substitution. Ho…
Electronic and Spin States at Edges of Finite -orbital Helical Atomic Chain
Takemitsu Kato, Yasuhiro Utsumi, Ora Entin-Wohlman +1
In connection to the chiral-induced spin-selectivity (CISS) effect, we theoretically analyze the electronic and spin states of edges of a finite -orbital helical atomic chain wi…
Surface-termination-dependent electronic states in kagome superconductors AV3Sb5 (A = K, Rb, Cs) studied by micro-ARPES
Takemi Kato, Yongkai Li, Min Liu +9
Recently discovered kagome superconductors AV3Sb5 (A = K, Rb, Cs) exhibit exotic bulk and surface physical properties such as charge-density wave (CDW) and chirality, whereas their…
Charge order with unusual star-of-David lattice in monolayer NbTe2
Taiki Taguchi, Katsuaki Sugawara, Hirofumi Oka +8
Interplay between fermiology and electron correlation is crucial for realizing exotic quantum phases. Transition-metal dichalcogenide (TMD) 1T-TaS2 has sparked a tremendous attenti…
Polarity-dependent charge-density wave in a kagome superconductor CsV3Sb5
Takemi Kato, Yongkai Li, Kosuke Nakayama +7
Polar surface and interface play a pivotal role for realizing exotic properties of materials, and a search for such polar states is of crucial importance for expanding materials' f…
Spin-filtering in a -orbital helical atomic chain
Yasuhiro Utsumi, Takemitsu Kato, Ora Entin-Wohlman +1
We theoretically analyze spin filtering in two-terminal systems, induced by the spin-orbit interaction (SOI), as a possible origin of the ``chirality-induced spin selectivity'' (CI…
Three-dimensional energy gap and origin of charge-density wave in kagome superconductor KV3Sb5
Takemi Kato, Yongkai Li, Tappei Kawakami +8
Kagome lattices offer a fertile ground to explore exotic quantum phenomena associated with electron correlation and band topology. The recent discovery of superconductivity coexist…
Fermiology and Origin of Tc Enhancement in a Kagome Superconductor Cs(V1-xNbx)3Sb5
Takemi Kato, Yongkai Li, Kosuke Nakayama +9
Kagome metals AV3Sb5 (A = K, Rb, and Cs) exhibit a characteristic superconducting ground state coexisting with charge-density wave (CDW), whereas the mechanisms of the superconduct…
Carrier Injection and Manipulation of Charge-Density Wave in Kagome Superconductor CsV3Sb5
Kosuke Nakayama, Yongkai Li, Takemi Kato +5
Kagome metals AV3Sb5 (A = K, Rb, and Cs) exhibit a unique superconducting ground state coexisting with charge-density wave (CDW), whereas how these characteristics are affected by…
Electronic states of multilayer VTe2: quasi-one-dimensional Fermi surface and implications to charge-density waves
T. Kawakami, K. Sugawara, T. Kato +4
We have performed angle-resolved photoemission spectroscopy on epitaxial VTe2 films to elucidate the relationship between the fermiology and charge-density waves (CDW). We found th…
Multiple Energy Scales and Anisotropic Energy Gap in the Charge-Density-Wave Phase of Kagome Superconductor CsV3Sb5
Kosuke Nakayama, Yongkai Li, Takemi Kato +5
Kagome metals AV3Sb5 (A = K, Rb, and Cs) exhibit superconductivity at 0.9-2.5 K and charge-density wave (CDW) at 78-103 K. Key electronic states associated with the CDW and superco…
Modulation of Dirac electrons in epitaxial Bi2Se3 ultrathin films on van-der-Waals ferromagnet Cr2Si2Te6
Takemi Kato, Katsuaki Sugawara, Naohiro Ito +7
We investigated the Dirac-cone state and its modulation when an ultrathin film of topological insulator Bi2Se3 was epitaxially grown on a van-der-Waals ferromagnet Cr2Si2Te6 (CST)…