98 citations · 535 across the 34 of their papers we have counts for
34 papers
Quantum phase with spontaneous translational symmetry breaking in an extended diamond chain
Hironori Yamaguchi, Shunsuke C. Furuya, Yu Tominaga +2
We report the experimental realization of a spin-1/2 extended diamond chain in a verdazyl-Cu complex, where competing interactions and lattice distortions give rise to exotic quant…
Generation of magnetic chiral solitons, skyrmions, and hedgehogs with electric fields
Teruya Nakagawara, Minoru Kanega, Shunsuke C. Furuya +1
Electric-field controls of Dzyaloshinskii-Moriya interactions (DMIs) have recently been discussed from the microscopic viewpoint. Since the DMI plays a critical role in generating…
Spin pumping into quantum spin chains
Shunsuke C. Furuya, Mamoru Matsuo, Takeo Kato
We theoretically investigate spin pumping into a quantum easy-plane ferromagnetic spin chain system. This quantum spin chain is effectively described by the Tomonaga-Luttinger (TL)…
Generation of third-harmonic spin oscillation from strong spin precession induced by terahertz magnetic near fields
Zhenya Zhang, Fumiya Sekiguchi, Takahiro Moriyama +9
The ability to drive a spin system to state far from the equilibrium is indispensable for investigating spin structures of antiferromagnets and their functional nonlinearities for…
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].…
Gapless chirality liquid with symmetry-protected edge spins
Shunsuke C. Furuya, Katsuhiro Morita
We report that a spin-1/2 tetrahedral Heisenberg chain realizes a gapless symmetry-protected topological (gSPT) phase characterized by the coexistence of the Tomonaga-Luttinger-liq…
Gapless symmetry-protected topological phase of quantum antiferromagnets on anisotropic triangular strip
Yuichiro Hidaka, Shunsuke C. Furuya, Atsushi Ueda +1
We study a three-leg spin-1/2 ladder with geometrically frustrated interleg interactions. We call this model an anisotropic triangular-strip (ATS) model. We numerically and field-t…
Electric-field control of magnetic anisotropies: applications to Kitaev spin liquids and topological spin textures
Shunsuke C. Furuya, Masahiro Sato
Magnetic anisotropies often originate from the spin-orbit coupling and determine magnetic ordering patterns. We develop a microscopic theory for DC electric-field controls of magne…
Quantized edge magnetizations and their symmetry protection in one-dimensional quantum spin systems
Shunsuke C. Furuya, Masahiro Sato
The bulk electric polarization works as a nonlocal order parameter that characterizes topological quantum matters. Motivated by a recent paper [H. Watanabe \textit{et al.}, Phys. R…
Control of superexchange interactions with DC electric fields
Shunsuke C. Furuya, Kazuaki Takasan, Masahiro Sato
We discuss DC electric-field controls of superexchange interactions. We first present generic results about antiferromagnetic and ferromagnetic superexchange interactions valid in…
Anomalies of kagome antiferromagnets on magnetization plateaus
Shunsuke C. Furuya, Yusuke Horinouchi, Tsutomu Momoi
We discuss the ground-state degeneracy of spin- kagome-lattice quantum antiferromagnets on magnetization plateaus by employing two complementary methods: the adiabatic flux in…
Anisotropy-induced soliton excitation in magnetized strong-rung spin ladders
Yu. V. Krasnikova, S. C. Furuya, V. N. Glazkov +3
We report low temperature electron spin resonance experimental and theoretical studies of an archetype strong-rung spin ladder material (CHN)CuBr.…
Field-induced dimer orders in quantum spin chains
Shunsuke C. Furuya
Field-induced excitation gaps in quantum spin chains are an interesting phenomenon related to confinements of topological excitations. In this paper, I present a novel type of this…
Translation constraints on quantum phases with twisted boundary conditions
Shunsuke C. Furuya, Yusuke Horinouchi
Bulk properties of quantum phases should be independent of a specific choice of boundary conditions as long as the boundary respects the symmetries. Based on this physically reason…
Polarization amplitude near quantum critical points
Shunsuke C. Furuya, Masaaki Nakamura
We discuss the polarization amplitude of quantum spin systems in one dimension. In particular, we closely investigate it in gapless phases of those systems based on the two-dimensi…
Ground-State Phase Diagram of an Anisotropic S=1/2 Ladder with Different Leg Interactions
Takashi Tonegawa, Toshiya Hikihara, Kiyomi Okamoto +2
We explore the ground-state phase diagram of the two-leg ladder with different leg interactions. The and components of the leg interactions between nearest-neighbo…
Topological transition between competing orders in quantum spin chains
Shintaro Takayoshi, Shunsuke C. Furuya, Thierry Giamarchi
We study quantum phase transitions between competing orders in one-dimensional spin systems. We focus on systems that can be mapped to a dual-field double sine-Gordon model as a bo…
Extraction of topological information in Tomonaga-Luttinger liquids
Masaaki Nakamura, Shunsuke C. Furuya
We discuss expectation values of the twist operator appearing in the Lieb-Schultz-Mattis theorem (or the polarization operator for periodic systems) in excited states of the on…
Electron spin resonance for the detection of long-range spin nematic order
Shunsuke C. Furuya, Tsutomu Momoi
In this paper we propose that electron spin resonance (ESR) measurements enable us to detect the long-range spin nematic order. We show that the frequency of the paramagnetic reson…
Topological quantum phase transition in the Ising-like antiferromagnetic spin chain BaCoVO
Q. Faure, S. Takayoshi, S. Petit +13
Since the seminal ideas of Berezinskii, Kosterlitz and Thouless, topological excitations are at the heart of our understanding of a whole novel class of phase transitions. In most…
Angular dependence of electron spin resonance for detecting quadrupolar liquid state of frustrated spin chains
Shunsuke C. Furuya
Spin nematic phase is a phase of frustrated quantum magnets with a quadrupolar order of electron spins. Since the spin nematic order is usually masked in experimentally accessible…
Dimensional modulation of spontaneous magnetic order in quasi-two-dimensional quantum antiferromagnets
Shunsuke C. Furuya, Maxime Dupont, Sylvain Capponi +2
Spontaneous symmetry breaking is deeply related to dimensionality of system. The Neel order going with spontaneous breaking of symmetry is safely allowed at any temperature…
ESR modes in a Strong-Leg Ladder in the Tomonaga-Luttinger Liquid Phase
M. Ozerov, M. Maksymenko, J. Wosnitza +6
Magnetic excitations in the strong-leg quantum spin ladder compound (CHN)CuBr (known as DIMPY) in the field-induced Tomonaga-Luttinger spin liquid phase are stud…
Negative Coulomb Drag in Coupled Quantum Wires
Shunsuke C. Furuya, Hiroyasu Matsuura, Masao Ogata
We present a theory of negative Coulomb drag in capacitively coupled quantum wires based on the commensurability of the electron density and the long-range nature of the Coulomb in…