125 citations · 530 across the 28 of their papers we have counts for
28 papers
Designing electronic magnetoelectric matter with organic quantum spin trimers
Yuko Hosokoshi, Christopher P. Aoyama, Zhuowei Zhang +17
Magnetoelectric (ME) phenomena are commonly driven by spin-lattice coupling. Here we demonstrate a different route based on frustrated quantum spin trimers that intrinsically inter…
Realization of a triangular spin necklace in a verdazyl-based Ni complex
Itsuki Shimamura, Risa Yagura, Takanori Kida +6
We successfully synthesized a verdazyl-based complex, (-Py-V)[Ni(NO)], in which Ni ions and verdazyl radicals form a one-dimensional, triangular spin necklace…
Gapless behavior in a two-leg spin ladder with bond randomness
Yu Tominaga, Itsuki Shimamura, Takanori Kida +5
We successfully synthesized [Cu(AcO)(-Py-V--F)]4CHCl, a verdazyl-based complex with a paddlewheel structure comprising two Cu atoms, which induces stro…
Quantum spin state stabilized by coupling with classical spins
Hironori Yamaguchi, Tsuyoshi Okubo, Akira Matsuo +5
We introduce a model compound featuring a spin-1/2 frustrated square lattice partially coupled by spin-5/2. A significant magnetization plateau exceeding 60 T could be observed, in…
Magnetic properties of a spin-1/2 octagonal lattice
Satoshi Morota, Takanori Kida, Masayuki Hagiwara +3
We successfully synthesized a verdazyl-based complex, (-Py-V--CN)[Cu(hfac)]. Molecular orbital calculations reveal that three types of antiferromagnetic (AF) interact…
Quantum gapped state in a spin-1/2 distorted honeycomb-based lattice with frustration
Hironori Yamaguchi, Satoshi Morota, Takanori Kida +5
We successfully synthesized (-Py-V)[Cu(hfac)], a verdazyl-based complex. Molecular orbital calculations revealed five types of intermolecular interactions between the radica…
Field-induced quantum phase in a frustrated zigzag-square lattice
Hironori Yamaguchi, Kazutoshi Shimamura, Yasuo Yoshida +10
This study presents the experimental realization of a spin-1/2 zigzag-square lattice in a verdazyl-based complex, namely (-Py-V-2,6-F)Cu(hfac). Molecular orbital cal…
Spin-Peierls transition to a Haldane phase
Hironori Yamaguchi, Hiroki Takahashi, Takashi Kawakami +4
We present an organic compound exhibiting a spin-Peierls (SP) transition to an effective spin-1 antiferromagnetic uniform chain, that is, the Haldane chain. The clear disappearance…
Observation of thermodynamics originating from a mixed-spin ferromagnetic chain
H. Yamaguchi, S. C. Furuya, S. Morota +6
We present a model compound that forms a mixed-spin ferromagnetic chain. Our material design, based on the organic radicals, affords a verdazyl-based complex (p-Py-V)2[Mn(hfac)2].…
Gapped ground state in a spin-1/2 frustrated square lattice
H. Yamaguchi, N. Uemoto, T. Okubo +7
We present a model compound with a spin-1/2 frustrated square lattice, in which three ferromagnetic (F) interactions and one antiferromagnetic (AF) compet. Considering the effectiv…
Quantum critical phenomena in a spin-1/2 frustrated square lattice with spatial anisotropy
H. Yamaguchi, Y. Iwasaki, Y. Kono +7
We present a model compound with a spin-1/2 spatially anisotropic frustrated square lattice, in which three antiferromagnetic interactions and one ferromagnetic interaction are com…
Experimental realization of Lieb-Mattis plateau in a quantum spin chain
H. Yamaguchi, T. Okita, Y. Iwasaki +7
We present a mixed spin-(1/2, 5/2) chain composed of a charge-transfer salt (4-Br--MePy-V)FeCl. We observe the entire magnetization curve up to saturation, which exhibits a…
Emergent critical phenomenon in spin-1/2 ferromagnetic-leg ladders: Quasi-one-dimensional Bose--Einstein condensate
Y. Kono, S. Kittaka, H. Yamaguchi +2
We examine the magnetic-field-induced criticality of phase boundary near saturation field in the spin-1/2 ferromagnetic (FM)-leg ladder 3-Cl-4-F-V [=3-(3-chloro-4-…
=1/2 ferromagnetic Heisenberg chain in a verdazyl-based complex
N. Uemoto, Y. Kono, S. Kittaka +6
We present a model compound for the =1/2 ferromagnetic Heisenberg chain composed of the verdazyl-based complex Zn(hfac)4-Cl--Py-V-(4-F). MO calc…
Field-induced quantum magnetism in the verdazyl-based charge-transfer salt -MePy-V-(-Br)FeCl
Y. Iwasaki, T. Kida, M. Hagiwara +6
We successfully synthesized a verdazyl-based charge-transfer salt -MePy-V-(-Br)FeCl, which has an =1/2 on the radical -MePy-V-(-Br) and an $…
Field-enhanced quantum fuctuation in S=1/2 frustrated square lattice
H. Yamaguchi, Y. Sasaki, T. Okubo +9
We present a new model compound with the S = 1/2 frustrated square lattice composed of the charge-transfer salt (o-MePy-V)PF6. Ab initio calculations indicate the formation of an S…
Quasi-one-dimensional Bose-Einstein Condensation in the Spin-1/2 Ferromagnetic-leg Ladder 3-I-V
Y. Kono, S. Kittaka, H. Yamaguchi +2
Quantum criticality of the spin-1/2 ferromagnetic-leg ladder 3-I-V [=3-(3-iodophenyl)-1,5-diphenylverdazyl] has been examined with respect to the antiferromagnetic to paramagnetic…
Three-dimensional Bose-Einstein Condensation in the Spin-1/2 Ferromagnetic-leg Ladder 3-Br-4-F-V
Y. Kono, H. Yamaguchi, Y. Hosokoshi +1
The critical exponent of the phase boundary has been examined on the three-dimensional incommensurate ordering phase in the spin-1/2 ferromagnetic-leg ladder 3-Br-4-F-V [=3-(3-brom…
Randomness-induced quantum spin liquid on honeycomb lattice
H. Yamaguchi, M. Okada, Y. Kono +5
We present a quantu spin liquid state in a spin-1/2 honeycomb lattice with randomness in the exchange interaction. That is, we successfully introduce randomness into the organic ra…
Magnetic properties of quasi-two-dimensional = 1/2 Heisenberg antiferromagnet with distorted square lattice
Hironori Yamaguchi, Yusuke Tamekuni, Yoshiki Iwasaki +4
We successfully synthesize single crystals of the verdazyl radical -2,3,5-Cl-V. molecular orbital calculations indicate that the two dominant antiferromagnetic…
Anomalous magnetization of =2 ferromagnetic-antiferromagnetic alternating chain with Ising anisotropy
H. Yamaguchi, Y. Shinpuku, Y. Kono +7
We present the first experimental realization of an ferromagnetic-antiferromagnetic (F-AF) alternating chain in a new Mn-verdazyl complex [Mn(hfac)](-Py-V) [hfa…
= 1/2 ferromagnetic-antiferromagnetic alternating Heisenberg chain in a zinc-verdazyl complex
Hironori Yamaguchi, Yasuhiro Shinpuku, Tokuro Shimokawa +6
We successfully synthesized the zinc-verdazyl complex [Zn(hfac)](-Py-V) [hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate; -Py-V = 3-(2-pyridyl)-1,5-diphenylverdazyl],…
Field-induced incommensurate phase in the strong-rung spin ladder with ferromagnetic legs
H. Yamaguchi, H. Miyagai, M. Yoshida +12
We report magnetization, specific heat, and NMR measurements of 3-Br-4-F-V [=3-(3-bromo-4-fluorophenyl)-1,5-diphenylverdazyl], a strong-rung S=1/2 Heisenberg spin ladder with ferro…
Fine-Tuning of Magnetic Interactions in Organic Spin Ladders
Hironori Yamaguchi, Hirotsugu Miyagai, Tokuro Shimokawa +10
We have succeeded in synthesizing two types of new organic radical crystals 3-I-V [= 3- (3-iodophenyl)-1,5-diphenylverdazyl] and 3-Br-4-F-V [= 3-(3-bromo-4-fluorophenyl)-1,5- diphe…