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  1. Article ; Online: Violation of emergent rotational symmetry in the hexagonal Kagome superconductor CsV

    Fukushima, Kazumi / Obata, Keito / Yamane, Soichiro / Hu, Yajian / Li, Yongkai / Yao, Yugui / Wang, Zhiwei / Maeno, Yoshiteru / Yonezawa, Shingo

    Nature communications

    2024  Volume 15, Issue 1, Page(s) 2888

    Abstract: Superconductivity is caused by electron pairs that are canonically isotropic, whereas some exotic superconductors are known to exhibit non-trivial anisotropy stemming from unconventional pairings. However, superconductors with hexagonal symmetry, the ... ...

    Abstract Superconductivity is caused by electron pairs that are canonically isotropic, whereas some exotic superconductors are known to exhibit non-trivial anisotropy stemming from unconventional pairings. However, superconductors with hexagonal symmetry, the highest rotational symmetry allowed in crystals, exceptionally have strong constraint that is called emergent rotational symmetry (ERS): anisotropic properties should be very weak especially near the critical temperature T
    Language English
    Publishing date 2024-04-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-024-47043-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: [Case of Intraoperative Supratentorial Subdural Hematoma during Microvascular Decompression in a Elderly Person].

    Kumagai, Masaki / Ishiguro, Mitsunori / Yonezawa, Shingo / Hara, Shigeru / Fukazawa, Seiji

    No shinkei geka. Neurological surgery

    2020  Volume 48, Issue 3, Page(s) 261–265

    MeSH term(s) Aged ; Hematoma, Subdural/surgery ; Hematoma, Subdural, Acute/surgery ; Humans ; Microvascular Decompression Surgery
    Language Japanese
    Publishing date 2020-04-11
    Publishing country Japan
    Document type Case Reports ; Journal Article
    ZDB-ID 197053-7
    ISSN 1882-1251 ; 0301-2603
    ISSN (online) 1882-1251
    ISSN 0301-2603
    DOI 10.11477/mf.1436204172
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 1834: Show issues Location:
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    Zs.MO 268: Show issues

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  3. Article ; Online: Uniaxial-strain control of nematic superconductivity in Sr

    Kostylev, Ivan / Yonezawa, Shingo / Wang, Zhiwei / Ando, Yoichi / Maeno, Yoshiteru

    Nature communications

    2020  Volume 11, Issue 1, Page(s) 4152

    Abstract: Nematic states are characterized by rotational symmetry breaking without translational ordering. Recently, nematic superconductivity, in which the superconducting gap spontaneously lifts the rotational symmetry of the lattice, has been discovered. In ... ...

    Abstract Nematic states are characterized by rotational symmetry breaking without translational ordering. Recently, nematic superconductivity, in which the superconducting gap spontaneously lifts the rotational symmetry of the lattice, has been discovered. In nematic superconductivity, multiple superconducting domains with different nematic orientations can exist, and these domains can be controlled by a conjugate external stimulus. Domain engineering is quite common in magnets but has not been achieved in superconductors. Here, we report control of the nematic superconductivity and their domains of Sr
    Language English
    Publishing date 2020-08-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-020-17913-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: The Diagnosis and Management of Acute Stroke with Emergent Large Vessel Occlusion Screen.

    Imai, Naoya / Ishiguro, Mitsunori / Yonezawa, Shingo / Nonaka, Yuko / Hara, Shigeru / Fukazawa, Seiji

    Journal of neuroendovascular therapy

    2021  Volume 15, Issue 12, Page(s) 800–804

    Abstract: Objective: Endovascular therapy (EVT) is a well-documented treatment for acute occlusion of major cerebral arteries. We carried out in-hospital triage using the emergency large vessel occlusion (ELVO) screen, a pre-hospital scale for acute stroke, to ... ...

    Abstract Objective: Endovascular therapy (EVT) is a well-documented treatment for acute occlusion of major cerebral arteries. We carried out in-hospital triage using the emergency large vessel occlusion (ELVO) screen, a pre-hospital scale for acute stroke, to diagnose EVT cases and considered its efficacy.
    Methods: We investigated stroke cases examined within 24 hours of onset in a 6-month period beginning on March 15, 2019. The results of ELVO screen were retrospectively considered with the presence of atrial fibrillation and treatment of EVT.
    Results: A total of 146 cases were included. Of the 65 positive ELVO screen cases, 33 (51%) had large vessel occlusion (LVO). Of the 81 negative ELVO screen cases, 11 (14%) had LVO (sensitivity, 75%; specificity, 69%; positive predictive value, 51%; negative predictive value, 86%; accuracy, 71%; P <0.001). Among LVO cases, 16 of the 33 (48%) positive ELVO screen cases and 2 of the 11 (18%) negative ELVO screen cases were treated by EVT. Complications of atrial fibrillation were significantly more common in positive ELVO screen cases (P = 0.001). EVT was carried out in nearly half of the positive ELVO screen cases of atrial fibrillation, being a significantly higher rate (10 of 24 cases, 42%; P = 0.02).
    Conclusion: The accuracy of EVT use increased in positive ELVO screen cases, particularly in those with atrial fibrillation. In-hospital triage using ELVO screen, a pre-hospital scale, significantly aided in selecting patients requiring EVT.
    Language English
    Publishing date 2021-04-22
    Publishing country Japan
    Document type Journal Article
    ISSN 2186-2494
    ISSN (online) 2186-2494
    DOI 10.5797/jnet.oa.2020-0168
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Book ; Online: Diamagnetic-like response from localised heating of a paramagnetic material

    Mattoni, Giordano / Yonezawa, Shingo / Maeno, Yoshiteru

    2020  

    Abstract: In the search of material properties out-of-equilibrium, the non-equilibrium steady states induced by electric current are an appealing research direction where unconventional states may emerge. However, the unavoidable Joule heating caused by flowing ... ...

    Abstract In the search of material properties out-of-equilibrium, the non-equilibrium steady states induced by electric current are an appealing research direction where unconventional states may emerge. However, the unavoidable Joule heating caused by flowing current calls for the development of new measurement protocols, with a particular attention to the physical properties of the background materials involved. Here, we demonstrate that localised heating can give rise to a large, spurious diamagnetic-like signal. This occurs due to the local reduction of the background magnetisation caused by the heated sample, provided that the background material has a Curie-like susceptibility. Our experimental results, along with numerical calculations, constitute an important building block for performing accurate magnetic measurements under the flow of electric current.
    Keywords Condensed Matter - Materials Science ; Physics - Instrumentation and Detectors
    Subject code 621
    Publishing date 2020-04-09
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Book ; Online: Role of local temperature in the current-driven metal-insulator transition of Ca2RuO4

    Mattoni, Giordano / Yonezawa, Shingo / Nakamura, Fumihiko / Maeno, Yoshiteru

    2020  

    Abstract: It was recently reported that a continuous electric current is a powerful control parameter to trigger changes in the electronic structure and metal-insulator transitions (MITs) in Ca2RuO4. However, the spatial evolution of the MIT and the implications ... ...

    Abstract It was recently reported that a continuous electric current is a powerful control parameter to trigger changes in the electronic structure and metal-insulator transitions (MITs) in Ca2RuO4. However, the spatial evolution of the MIT and the implications of the unavoidable Joule heating have not been clarified yet, often hindered by the difficulty to asses the local sample temperature. In this work, we perform infrared thermal imaging on single-crystal Ca2RuO4 while controlling the MIT by electric current. The change in emissivity at the phase transition allows us to monitor the gradual formation and expansion of metallic phase upon increasing current. Our local temperature measurements indicate that, within our experimental resolution, the MIT always occurs at the same local transition temperatures, irrespectively if driven by temperature or by current. Our results highlight the importance of local heating, phase coexistence, and microscale inhomogeneity when studying strongly correlated materials under the flow of electric current.
    Keywords Condensed Matter - Materials Science ; Condensed Matter - Strongly Correlated Electrons
    Subject code 530
    Publishing date 2020-07-14
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Retraction.

    Sow, Chanchal / Yonezawa, Shingo / Kitamura, Sota / Oka, Takashi / Kuroki, Kazuhiko / Nakamura, Fumihiko / Maeno, Yoshiteru

    Science (New York, N.Y.)

    2020  Volume 368, Issue 6489, Page(s) 376

    Language English
    Publishing date 2020-03-25
    Publishing country United States
    Document type Letter ; Retraction of Publication
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.abc0469
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 27: Show issues Location:
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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
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    Zs.MG 77: Show issues

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  8. Article ; Online: Retraction: In Situ Control of Diamagnetism by Electric Current in Ca_{3}(Ru_{1-x}Ti_{x})_{2}O_{7} [Phys. Rev. Lett. 122, 196602 (2019)].

    Sow, Chanchal / Numasaki, Ryo / Mattoni, Giordano / Yonezawa, Shingo / Kikugawa, Naoki / Uji, Shinya / Maeno, Yoshiteru

    Physical review letters

    2020  Volume 124, Issue 16, Page(s) 169902

    Abstract: Retraction of DOI: 10.1103/PhysRevLett.122.196602. ...

    Abstract Retraction of DOI: 10.1103/PhysRevLett.122.196602.
    Language English
    Publishing date 2020-05-08
    Publishing country United States
    Document type Journal Article ; Retraction of Publication
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.124.169902
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    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

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  9. Book ; Online: Peak in the superconducting transition temperature of the nonmagnetic topological line-nodal material CaSb$_2$ under pressure

    Kitagawa, Shunsaku / Ishida, Kenji / Ikeda, Atsutoshi / Kawaguchi, Mayo / Yonezawa, Shingo / Maeno, Yoshiteru

    2021  

    Abstract: Investigating the pressure dependence of the superconducting (SC) transition temperature $T_{\rm c}$ is crucial for understanding the SC mechanism. Herein, we report on the pressure dependence of $T_{\rm c}$ in the nonmagnetic topological line-nodal ... ...

    Abstract Investigating the pressure dependence of the superconducting (SC) transition temperature $T_{\rm c}$ is crucial for understanding the SC mechanism. Herein, we report on the pressure dependence of $T_{\rm c}$ in the nonmagnetic topological line-nodal material CaSb$_2$, based on measurements of electric resistance and alternating current magnetic susceptibility. $T_{\rm c}$ initially increases with increasing pressure and peaks at $\sim$ 3.1~GPa. With a further increase in pressure, $T_{\rm c}$ decreases and finally becomes undetectable at 5.9~GPa. Because no signs of phase transition or Lifshitz transition are observed in the normal state, the peculiar peak structure of $T_{\rm c}$ suggests that CaSb$_2$ has an unconventional SC character.

    Comment: 5 pages, 5 figures
    Keywords Condensed Matter - Superconductivity ; Condensed Matter - Materials Science
    Publishing date 2021-08-20
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: In Situ Control of Diamagnetism by Electric Current in Ca_{3}(Ru_{1-x}Ti_{x})_{2}O_{7}.

    Sow, Chanchal / Numasaki, Ryo / Mattoni, Giordano / Yonezawa, Shingo / Kikugawa, Naoki / Uji, Shinya / Maeno, Yoshiteru

    publication RETRACTED

    Physical review letters

    2019  Volume 122, Issue 19, Page(s) 196602

    Abstract: Nonequilibrium steady state conditions induced by a dc current can alter the physical properties of strongly correlated electron systems. In this regard, it was recently shown that dc current can trigger novel electronic states, such as current-induced ... ...

    Abstract Nonequilibrium steady state conditions induced by a dc current can alter the physical properties of strongly correlated electron systems. In this regard, it was recently shown that dc current can trigger novel electronic states, such as current-induced diamagnetism, which cannot be realized in equilibrium conditions. However, reversible control of diamagnetism has not been achieved yet. Here, we demonstrate reversible in situ control between a Mott insulating state and a diamagnetic semimetal-like state by a dc current in the Ti-substituted bilayer ruthenate Ca_{3}(Ru_{1-x}Ti_{x})_{2}O_{7} (x=0.5%). By performing simultaneous magnetic and resistive measurements, we map out the temperature vs current-density phase diagram in the nonequilibrium steady state of this material. The present results open up the possibility of creating novel electronic states in a variety of strongly correlated electron systems under dc current.
    Language English
    Publishing date 2019-05-24
    Publishing country United States
    Document type Journal Article ; Retracted Publication
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.122.196602
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

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