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Emergent charge order near the doping-induced Mott-insulating quantum phase transition in SrRuO
Justin Leshen, Mariam Kavai, Ioannis Giannakis +5
We investigate the double layered Sr(RuMn)O and its doping-induced quantum phase transition (QPT) from a metal to an antiferromagnetic (AFM) Mott in…
Skyrmion phase and competing magnetic orders on a breathing kagome lattice
Max Hirschberger, Taro Nakajima, Shang Gao +13
Magnetic skyrmion textures are realized mainly in non-centrosymmetric, e.g. chiral or polar, magnets. Extending the field to centrosymmetric bulk materials is a rewarding challenge…
A protonated brownmillerite electrolyte for superior low-temperature proton conductivity
Nianpeng Lu, Yujia Wang, Shuang Qiao +18
Design novel solid oxide electrolyte with enhanced ionic conductivity forms one of the Holy Grails in the field of materials science due to its great potential for wide range of en…
Controlling the helicity of magnetic skyrmions in a -Mn-type high-temperature chiral magnet
K. Karube, K. Shibata, J. S. White +8
Magnetic helices and skyrmions in noncentrosymmetric magnets are representative examples of chiral spin textures in solids. Their spin swirling direction, often termed as the magne…
Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet
K. Karube, J. S. White, D. Morikawa +9
Magnetic skyrmions are vortex-like topological spin textures often observed to form a triangular-lattice skyrmion crystal in structurally chiral magnets with Dzyaloshinskii-Moriya…
Kinetic approach to superconductivity hidden behind a competing order
H. Oike, M. Kamitani, Y. Tokura +1
Exploration for superconductivity is one of the research frontiers in condensed matter physics. In strongly correlated electron systems, the emergence of superconductivity is often…
Impact of electrodes on the extraction of shift current from a ferroelectric semiconductor SbSI
M. Nakamura, H. Hatada, Y. Kaneko +3
Noncentrosymmetric bulk crystals generate photocurrent without any bias voltage. One of the dominant mechanisms, shift current, comes from a quantum interference of electron wave f…
Increased lifetime of metastable skyrmions by doping
M. T. Birch, R. Takagi, S. Seki +12
Previous observations of metastable magnetic skyrmions have shown that close to the equilibrium pocket the metastable state has a short lifetime, and therefore rapid cooling is req…
Impact of antiferromagnetic order on Landau level splitting of quasi-two-dimensional Dirac fermions in EuMnBi
H. Masuda, H. Sakai, M. Tokunaga +7
We report spin-split Landau levels of quasi-two-dimensional Dirac fermions in a layered antiferromagnet EuMnBi, as revealed by interlayer resistivity measurements in a tilted m…
Negative-pressure-induced helimagnetism in ferromagnetic cubic perovskites SrBaCoO
H. Sakai, S. Yokoyama, A. Kuwabara +9
Helimagnetic materials are identified as promising for novel spintronic applications. Since helical spin order is manifested as a compromise of competing magnetic exchange interact…
Topological quantum phase transition in magnetic topological insulator upon magnetization rotation
Minoru Kawamura, Masataka Mogi, Ryutaro Yoshimi +5
We report a continuous phase transition between quantum-anomalous-Hall and trivial-insulator phases in a magnetic topological insulator upon magnetization rotation. The Hall conduc…
Disentangling charge and structural contributions during coherent atomic motions studied by ultrafast resonant x-ray diffraction
L. Rettig, A. Caviezel, S. O. Mariager +20
We report on the ultrafast dynamics of charge order and structural response during the photoinduced suppression of charge and orbital order in a mixed-valence manganite. Employing…
Emergent topological spin structures in a centrosymmetric cubic perovskite
S. Ishiwata, T. Nakajima, J. -H. Kim +18
The skyrmion crystal (SkX) characterized by a multiple-q helical spin modulation has been reported as a unique topological state that competes with the single-q helimagnetic order…
Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet
Takashi Kurumaji, Taro Nakajima, Max Hirschberger +7
Geometrically frustrated magnets provide abundant opportunities for discovering complex spin textures, which sometimes yield unconventional electromagnetic responses in correlated…
Emergence of topological Hall effect in half-metallic manganite thin films by tuning perpendicular magnetic anisotropy
M. Nakamura, D. Morikawa, X. Z. Yu +4
Magnetic materials hosting topological spin textures like magnetic skyrmion exhibit nontrivial Hall effect, namely, topological Hall effect (THE). In this study, we demonstrate the…
Spectral dynamics of topological shift-current in ferroelectric semiconductor SbSI
M. Sotome, M. Nakamura, J. Fujioka +8
Photoexcitation in solids brings about transitions of electrons/holes between different electronic bands. If the solid lacks an inversion symmetry, these electronic transitions sup…
Electric-field control of anomalous and topological Hall effects in oxide bilayer thin films
Yuki Ohuchi, Jobu Matsuno, Naoki Ogawa +4
One of the key technologies in spintronics is to tame spin-orbit coupling (SOC) that links spin and motion of electrons, giving rise to intriguing magneto-transport properties in i…