Tomoki Yamaguchi

activity

20172026

most citedVariety of order-by-disorder phases in the asymmetric

J_{1} - J_{2}

zigzag ladder: From the delta chain to the

J_{1} - J_{2}

chain

20 citations · 80 across the 8 of their papers we have counts for

collaborators

Showing cond-mat.str-elShow all

6 papers · 1 filter

cond-mat.str-el2021★ 3 cited

Anomalous fractional quantization in the kagomelike Heisenberg ladder: Emergence of the effective spin-1 chain

Tomoki Yamaguchi, Yukinori Ohta, Satoshi Nishimoto

We study a Kagome-like spin- $1/2$ Heisenberg ladder with competing ferromagnetic (FM) and antiferromagnetic (AFM) exchange interactions. Using the density-matrix renormalization gr…

cond-mat.str-el2021★ 17 cited

Slow dynamics of disordered zigzag chain molecules in layered LiVS2 under electron irradiation

Naoyuki Katayama, Keita Kojima, Tomoki Yamaguchi +8

Electronic instabilities in transition metal compounds often spontaneously form orbital molecules, which consist of orbital-coupled metal ions at low temperature. Recent local stru…

cond-mat.str-el2020★ 2 cited

Pressure-Induced Restoration of the Reversed Crystal-Field Splitting in $α$ -Sr $_{2}$ CrO $_{4}$

Ryo Takahashi, Tomoki Yamaguchi, Koudai Sugimoto +3

Motivated by an experimental finding that the successive phase transitions in $α$ -Sr $_{2}$ CrO $_{4}$ observed at ambient pressure ceases to exist under high pressures, we carry out the…

cond-mat.str-el2019★ 20 cited

Variety of order-by-disorder phases in the asymmetric $J_{1} - J_{2}$ zigzag ladder: From the delta chain to the $J_{1} - J_{2}$ chain

Tomoki Yamaguchi, Stefan-Ludwig Drechsler, Yukinori Ohta +1

We study an asymmetric $J_{1}$ - $J_{2}$ zigzag ladder consisting of two different spin- $\frac{1}{2}$ antiferromagnetic (AFM; $J_{2}$ , $γ J_{2} > 0$ ) Heisenberg legs coupled by zigzag-shaped fe…

cond-mat.str-el2018★ 18 cited

Exotic criticality in the dimerized spin-1 $X X Z$ chain with single-ion anisotropy

Satoshi Ejima, Tomoki Yamaguchi, Fabian H. L. Essler +3

We consider the dimerized spin-1 $X X Z$ chain with single-ion anisotropy $D$ . In absence of an explicit dimerization there are three phases: a large- $D$ , an antiferromagnetically or…

cond-mat.str-el2017★ 20 cited

Low-energy excitation spectra in the excitonic phase of cobalt oxides

Tomoki Yamaguchi, Koudai Sugimoto, Yukinori Ohta

We study the excitonic phase and low-energy excitation spectra of perovskite cobalt oxides. Constructing the five-orbital Hubbard model defined on the three-dimensional cubic latti…