32 citations · 116 across the 11 of their papers we have counts for
11 papers
Superzone gap formation induced by ferroic orders
Takayuki Ishitobi
We demonstrate that a superzone gap, typically associated with antiferroic ordering, can also emerge from ferroic orders in systems with sublattice degrees of freedom. By analyzing…
Three-stage Phase Transitions and Field-induced Phases in CeCoSi:A Landau Theory
Takayuki Ishitobi
We investigate both the nonmagnetic and magnetic ordered phases of CeCoSi using Landau theory. Our analysis predicts three successive phase transitions at zero magnetic field. A qu…
Inverse Single-sided Magnet
Takayuki Ishitobi
A single-sided magnet generates a magnetic field on only one side while canceling it on the opposite side, a feature that has enabled diverse applications in both fundamental scien…
Purely Electronic Chirality without Structural Chirality
Takayuki Ishitobi, Kazumasa Hattori
We introduce the concept of purely electronic chirality (PEC), which arises in the absence of structural chirality. In condensed matter physics and chemistry, chirality has convent…
Orbital moiré and quadrupolar triple-q physics in a triangular lattice
K. Hattori, T. Ishitobi, H. Tsunetsugu
We numerically study orders of planer type quadrupoles on a triangular lattice with nearest-neighbor isotropic and anisotropic interactions. This type of qua…
Electronic origin of ferroic quadrupole moment under antiferroic quadrupole orders and finite magnetic moment in systems
Haruhiro Kubo, Takayuki Ishitobi, Kazumasa Hattori
We study the electronic origin of parasitic ferroic quadrupole moments in antiferroic quadrupole orders by extending a model studied in G. Chen et al., Phys. Rev. B 82, 174440 (201…
Quadrupole partial orders and triple- states on the face-centered cubic lattice
Kazumasa Hattori, Takayuki Ishitobi, Hirokazu Tsunetsugu
We study quadrupole orders in a face-centered cubic lattice. The quadrupole moments under cubic symmetry possess a unique cubic invariant in their free energy in the un…
Triple- partial magnetic orders induced by quadrupolar interactions: Triforce order scenario for UNiB
Takayuki Ishitobi, Kazumasa Hattori
We theoretically investigate possible symmetry-broken states in , constructing a localized pseudo triplet crystalline-electric field model. For a long time, its low-t…
Triple- quadrupole-octupole order scenario for PrVAl
Takayuki Ishitobi, Kazumasa Hattori
We propose novel triple- multipole orders as possible candidates for the two distinct low-temperature symmetry broken phases in quadrupolar system PrVAl. An ana…
Quadrupole Orders on the fcc Lattice
Hirokazu Tsunetsugu, Takayuki Ishitobi, Kazumasa Hattori
We theoretically study electric quadrupole orders in f-electron systems on the fcc lattice. Qudrupole degrees of freedom and originate in the non-Kramers doublet…
Magnetoelectric Effects and Charge-Imbalanced Solenoids: Antiferro Quadrupole Orders in a Diamond Structure
Takayuki Ishitobi, Kazumasa Hattori
We study magnetoelectric (magneto-current) effects in a diamond structure under antiferro quadrupole (AFQ) orders. The AFQ orders break the spacial inversion symmetry and cause the…