45 citations · 309 across the 32 of their papers we have counts for
32 papers
Extended strange metal regime in a pure nematic quantum critical superconductor
Kousuke Ishida, Kiyotaka Mukasa, Shusaku Imajo +12
High-temperature superconductivity often emerges from a strange metallic state, where the electrical resistivity exhibits a linear-in-temperature dependence over an anomalously ext…
High-field fate of the Kitaev quantum spin liquid in -RuCl
K. Imamura, R. Ohno, Y. C. Tsuzuki +15
Kitaev quantum spin liquids (KQSLs) host fractionalized excitations described by itinerant Majorana quasiparticles and gapped fluxes (visons), providing a platform for emerge…
Bridging ambient- and high-pressure superconductivity in LaLnNiO films
Motoki Osada, Chieko Terakura, Shusaku Imajo +9
The discovery of high critical-temperature superconductivity near 80 K in bilayer nickelates under high pressure has sparked extensive studies. While superconducti…
Magnetoelastic mapping of the high-field phase diagram in the topological cubic helimagnet SrFeO
Masaki Gen, Shun Okumura, Shusaku Imajo +9
The cubic perovskite SrFeO is a prototypical centrosymmetric itinerant magnet that hosts a quadruple- hedgehog-antihedgehog lattice and exhibits a complex magnet…
Search for magnetoacoustic quantum oscillations in the insulating phase of YbB
Ryosuke Kurihara, Atsuhiko Miyata, Koji Araki +9
A highly exotic phenomenon in solid-state physics is the observation of magnetic quantum oscillations in insulators. For instance, in the Kondo insulator YbB various groups…
Fate of Pomeranchuk effect in ultrahigh magnetic fields
Naofumi Matsuyama, So Yokomori, Toshihiro Nomura +8
The Pomeranchuk effect is a counterintuitive phenomenon where liquid helium-3 (3He) solidifies under specific pressures, not when cooled, but when heated. This behaviour originates…
Systematic evolution of superconducting pairing strength and Seebeck coefficients in correlated infinite-layer LaSrNiO
Motoki Osada, Shusaku Imajo, Yuji Seki +6
The recently discovered superconducting infinite-layer nickelates offer a novel platform to explore an exotic pairing mechanism in multi-band systems towards high-temperature super…
Unified Description of Spin-Lattice Coupling and Thermodynamics in the Pyrochlore Heisenberg Antiferromagnet
Masaki Gen, Hidemaro Suwa, Shusaku Imajo +6
We study an extended model to describe the spin-lattice coupling, incorporating individual vibrations of bonds and atomic sites alongside distance-dependent exchange interactions.…
Electronic Structure of Kramers Nodal-Line Semimetal YAuGe and Anomalous Hall Effect Induced by Magnetic Rare-Earth Substitution
Takashi Kurumaji, Jorge I. Facio, Natsuki Mitsuishi +11
Nodal-line semimetals are a class of topological materials hosting one dimensional lines of band degeneracy. Kramers nodal-line (KNL) metals/semimetals have recently been theoretic…
= 1/2 Hyperoctagon Lattice in Cobalt Oxalate Metal-Organic-Framework
Hajime Ishikawa, Shusaku Imajo, Hikaru Takeda +4
We report the magnetic properties of a cobalt oxalate metal-organic-framework featuring the hyperoctagon lattice. Our thermodynamic measurements reveal the = 1/2 sta…
Quantum liquid states of spin solitons in a ferroelectric spin-Peierls state
Shusaku Imajo, Atsushi Miyake, Ryosuke Kurihara +4
In this study, we performed high-magnetic-field magnetization, dielectric, and ultrasound measurements on an organic salt showing a ferroelectric spin-Peierls (FSP) state, which is…
Pseudogap formation in organic superconductors
Shusaku Imajo, Takuya Kobayashi, Yuki Matsumura +4
The condensation of paired fermions into superfluid states changes progressively depending on the coupling strength. At the midpoint of the crossover between Bardeen--Cooper--Schri…
Superconductivity at 12 K in LaIOs: a 5d metal with osmium honeycomb layer
Hajime Ishikawa, Takeshi Yajima, Daisuke Nishio-Hamane +3
We discovered superconductivity at = 12 K in a layered compound LaIOs with osmium honeycomb network. Despite heavy constituent elements unfavorable for phonon mediate…
Thermodynamic Properties of the Mott Insulator-Metal Transition in a Triangular Lattice System Without Magnetic Order
Emre Yesil, Shusaku Imajo, Satoshi Yamashita +5
The organic system, -[(BEDT-TTF)(BEDT-STF)]Cu(CN), showing the Mott transition between a nonmagnetic Mott insulating (NMI) state and a Fermi liquid (FL),…
Correlation-driven organic 3D topological insulator with relativistic fermions
Tetsuya Nomoto, Shusaku Imajo, Hiroki Akutsu +2
Exploring new topological phenomena and functionalities induced by strong electron correlation has been a central issue in modern condensed-matter physics. One example is a topolog…
Novel quantum phase of the chromium spinel oxide HgCrO in high magnetic fields
Shojiro Kimura, Shusaku Imajo, Masaki Gen +4
In this study, we have performed the magnetocaloric effect and the specific heat measurements of chromium spinel oxide HgCrO, wherein the magnetic Cr ions form a hig…
Persistence of fermionic spin excitations through a genuine Mott transition in -type organics
Shusaku Imajo, Naoko Kato, Robert J. Marckwardt +3
We investigate the continuous variation of electronic states from a Fermi liquid to a quantum spin liquid induced by chemical substitution in the organic dimer-Mott system of -[…
Magnetically hidden state on the ground floor of the magnetic Devil's staircase
Shusaku Imajo, Naofumi Matsuyama, Toshihiro Nomura +10
We investigated the low-temperature and high-field thermodynamic and ultrasonic properties of SrCu2(BO3)2, which exhibits various plateaux in its magnetization curve above 27~T, ca…
Enhanced superconducting pairing strength near a nonmagnetic nematic quantum critical point
K. Mukasa, K. Ishida, S. Imajo +14
The quest for high-temperature superconductivity at ambient pressure is a central issue in physics. In this regard, the relationship between unconventional superconductivity and th…
Emergent anisotropy in the Fulde-Ferrell-Larkin-Ovchinnikov state
Shusaku Imajo, Toshihiro Nomura, Yoshimitsu Kohama +1
Exotic superconductivity is formed by unconventional electron pairing and exhibits various unique properties that cannot be explained by the basic theory. The Fulde-Ferrell-Larkin-…
Extraordinary -Electron Superconductivity Emerging from a Quantum Spin Liquid
Shusaku Imajo, Shiori Sugiura, Hiroki Akutsu +6
Quantum spin liquids (QSLs), in which spins are highly entangled, have been considered a groundwork for generating exotic superconductivity.Despite numerous efforts, superconductiv…
Thermodynamic evidence for the formation of a Fulde-Ferrell-Larkin-Ovchinnikov phase in the organic superconductor -(BETS)GaCl
Shusaku Imajo, Takuya Kobayashi, Atsushi Kawamoto +2
In this work, the thermodynamic properties of the organic superconductor -(BETS)GaCl are investigated to study a high-field superconducting state known as the putative F…
Quantum transport of topological spin solitonsin a one-dimensional organic ferroelectric
Shusaku Imajo, Atsushi Miyake, Ryosuke Kurihara +4
We report the dielectric, magnetic, and ultrasonic properties of a one-dimensional organic salt TTF-QBrI. These indicate that TTF-QBrI shows a ferroelectric spin-Peierls (F…
Revealing three-dimensional quantum criticality by Sr-substitution in Han Purple
Stephan Allenspach, Pascal Puphal, Joosep Link +20
Classical and quantum phase transitions (QPTs), with their accompanying concepts of criticality and universality, are a cornerstone of statistical thermodynamics. An exemplary cont…