245 citations · 2.7k across the 60 of their papers we have counts for
61 papers
Chiral Phonons in a Cubic Lattice
Hirokazu Tsunetsugu, Hiroaki Kusunose
We have developed a theory for the energy dispersion of chiral phonons in a simplest cubic lattice. Among all the phonon modes, only the optical triplet modes exhibit the intrinsic…
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…
Numerical Renormalization Group Study of Quadrupole Kondo Effect with the Crystal-field Excited State
Yuki Kaneko, Hirokazu Tsunetsugu
We have studied the quadrupolar Kondo effect for an impurity in cubic environment with taking account of a singlet excited state , which models a ion with a…
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…
Theory of Energy Dispersion of Chiral Phonon
Hirokazu Tsunetsugu, Hiroaki Kusunose
We have developed a microscopic theory on phonon energy dispersion in chiral crystals within a harmonic approximation. One of the main issues is about the splitting of sound veloci…
Nematicity Liquid in a Trimerized-Kagome Antiferromagnet
Ichiro Tanaka, Hirokazu Tsunetsugu
We theoretically study low-temperature properties of the antiferromagnetic Heisenberg model with half-integer spin on the Kagome lattice with large trimerization. We have deriv…