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  1. Article ; Online: Anisotropic proximity-induced superconductivity and edge supercurrent in Kagome metal, K

    Wang, Yaojia / Yang, Shuo-Ying / Sivakumar, Pranava K / Ortiz, Brenden R / Teicher, Samuel M L / Wu, Heng / Srivastava, Abhay K / Garg, Chirag / Liu, Defa / Parkin, Stuart S P / Toberer, Eric S / McQueen, Tyrel / Wilson, Stephen D / Ali, Mazhar N

    Science advances

    2023  Volume 9, Issue 28, Page(s) eadg7269

    Abstract: Materials with Kagome nets are of particular importance for their potential combination of strong correlation, exotic magnetism, and electronic topology. ... ...

    Abstract Materials with Kagome nets are of particular importance for their potential combination of strong correlation, exotic magnetism, and electronic topology. KV
    Language English
    Publishing date 2023-07-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.adg7269
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Field-Modulated Anomalous Hall Conductivity and Planar Hall Effect in Co

    Yang, Shuo-Ying / Noky, Jonathan / Gayles, Jacob / Dejene, Fasil Kidane / Sun, Yan / Dörr, Mathias / Skourski, Yurii / Felser, Claudia / Ali, Mazhar Nawaz / Liu, Enke / Parkin, Stuart S P

    Nano letters

    2020  Volume 20, Issue 11, Page(s) 7860–7867

    Abstract: Time-reversal-symmetry-breaking Weyl semimetals (WSMs) have attracted great attention recently because of the interplay between intrinsic magnetism and topologically nontrivial electrons. Here, we present anomalous Hall and planar Hall effect studies on ... ...

    Abstract Time-reversal-symmetry-breaking Weyl semimetals (WSMs) have attracted great attention recently because of the interplay between intrinsic magnetism and topologically nontrivial electrons. Here, we present anomalous Hall and planar Hall effect studies on Co
    Language English
    Publishing date 2020-10-09
    Publishing country United States
    Document type Journal Article
    ISSN 1530-6992
    ISSN (online) 1530-6992
    DOI 10.1021/acs.nanolett.0c02219
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Giant, unconventional anomalous Hall effect in the metallic frustrated magnet candidate, KV

    Yang, Shuo-Ying / Wang, Yaojia / Ortiz, Brenden R / Liu, Defa / Gayles, Jacob / Derunova, Elena / Gonzalez-Hernandez, Rafael / Šmejkal, Libor / Chen, Yulin / Parkin, Stuart S P / Wilson, Stephen D / Toberer, Eric S / McQueen, Tyrel / Ali, Mazhar N

    Science advances

    2020  Volume 6, Issue 31, Page(s) eabb6003

    Abstract: The anomalous Hall effect (AHE) is one of the most fundamental phenomena in physics. In the highly conductive regime, ferromagnetic metals have been the focus of past research. Here, we report a giant extrinsic AHE in ... ...

    Abstract The anomalous Hall effect (AHE) is one of the most fundamental phenomena in physics. In the highly conductive regime, ferromagnetic metals have been the focus of past research. Here, we report a giant extrinsic AHE in KV
    Language English
    Publishing date 2020-07-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.abb6003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Book ; Online: Anomalous, anomalous Hall effect in the layered, Kagome, Dirac semimetal KV$_3$Sb$_5$

    Yang, Shuo-Ying / Wang, Yaojia / Ortiz, Brenden R. / Liu, Defa / Gayles, Jacob / Derunova, Elena / Gonzalez-Hernandez, Rafael / Smejkal, Libor / Chen, Yulin / Parkin, Stuart S. P. / Wilson, Stephen D. / Toberer, Eric S. / McQueen, Tyrel / Ali, Mazhar N.

    2019  

    Abstract: The electronic anomalous Hall effect (AHE), where charge carriers acquire a velocity component orthogonal to an applied electric field, is one of the most fundamental and widely studied phenomena in physics. There are several different AHE mechanisms ... ...

    Abstract The electronic anomalous Hall effect (AHE), where charge carriers acquire a velocity component orthogonal to an applied electric field, is one of the most fundamental and widely studied phenomena in physics. There are several different AHE mechanisms known, and material examples are highly sought after, however in the highly conductive (skew scattering) regime the focus has centered around ferromagnetic metals. Here we report the observation of a giant extrinsic AHE in KV$_3$Sb$_5$, an exfoliable, Dirac semimetal with a Kagome layer of Vanadium atoms. Although there has been no reports of magnetic ordering down to 0.25 K, the anomalous Hall conductivity (AHC) reaches $\approx$ 15,507 $\Omega^{-1}$cm$^{-1}$ with an anomalous Hall ratio (AHR) of $\approx$ 1.8$ \%$; an order of magnitude larger than Fe. Defying expectations from skew scattering theory, KV$_3$Sb$_5$ shows an enhanced skew scattering effect that scales quadratically, not linearly, with the longitudinal conductivity ($\sigma_{xx}$), opening the possibility of reaching an anomalous Hall angle (AHA) of 90$^{\circ}$ in metals; an effect thought reserved for quantum anomalous Hall insulators. This observation raises fundamental questions about the AHE and opens a new frontier for AHE (and correspondingly SHE) exploration, stimulating investigation in a new direction of materials, including metallic geometrically frustrated magnets, spin-liquid candidates, and cluster magnets.
    Keywords Condensed Matter - Materials Science
    Subject code 621
    Publishing date 2019-12-27
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article: Giant anomalous Hall effect in a ferromagnetic Kagomé-lattice semimetal.

    Liu, Enke / Sun, Yan / Kumar, Nitesh / Müchler, Lukas / Sun, Aili / Jiao, Lin / Yang, Shuo-Ying / Liu, Defa / Liang, Aiji / Xu, Qiunan / Kroder, Johannes / Süß, Vicky / Borrmann, Horst / Shekhar, Chandra / Wang, Zhaosheng / Xi, Chuanying / Wang, Wenhong / Schnelle, Walter / Wirth, Steffen /
    Chen, Yulin / Goennenwein, Sebastian T B / Felser, Claudia

    Nature physics

    2018  Volume 14, Issue 11, Page(s) 1125–1131

    Abstract: Magnetic Weyl semimetals with broken time-reversal symmetry are expected to generate strong intrinsic anomalous Hall effects, due to their large Berry curvature. Here, we report a magnetic Weyl semimetal candidate, ... ...

    Abstract Magnetic Weyl semimetals with broken time-reversal symmetry are expected to generate strong intrinsic anomalous Hall effects, due to their large Berry curvature. Here, we report a magnetic Weyl semimetal candidate, Co
    Language English
    Publishing date 2018-07-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2206346-8
    ISSN 1745-2481 ; 1745-2473
    ISSN (online) 1745-2481
    ISSN 1745-2473
    DOI 10.1038/s41567-018-0234-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Book ; Online: Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal

    Liu, Enke / Sun, Yan / Kumar, Nitesh / Meuchler, Lukas / Sun, Aili / Jiao, Lin / Yang, Shuo-Ying / Liu, Defa / Liang, Aiji / Xu, Qiunan / Kroder, Johannes / Seuss, Vicky / Borrmann, Horst / Shekhar, Chandra / Wang, Zhaosheng / Xi, Chuanying / Wang, Wenhong / Schnelle, Walter / Wirth, Steffen /
    Chen, Yulin / Goennenwein, Sebastian T. B. / Felser, Claudia

    2017  

    Abstract: Magnetic Weyl semimetals with broken time-reversal symmetry are expected to generate strong intrinsic anomalous Hall effects, due to their large Berry curvature. Here, we report a magnetic Weyl semimetal candidate Co3Sn2S2 with a quasi-two-dimensional ... ...

    Abstract Magnetic Weyl semimetals with broken time-reversal symmetry are expected to generate strong intrinsic anomalous Hall effects, due to their large Berry curvature. Here, we report a magnetic Weyl semimetal candidate Co3Sn2S2 with a quasi-two-dimensional crystal structure consisting of stacked Kagome lattices. This lattice provides an excellent platform for hosting exotic quantum topological states. We observe a negative magnetoresistance that is consistent with the chiral anomaly expected from the presence of Weyl fermions close to the Fermi level. The anomalous Hall conductivity is robust against both increased temperature and charge conductivity, which corroborates the intrinsic Berry-curvature mechanism in momentum space. Owing to the low carrier density in this material and the significantly enhanced Berry curvature from its band structure, the anomalous Hall conductivity and the anomalous Hall angle simultaneously reach 1130 S cm-1 and 20%, respectively, an order of magnitude larger than typical magnetic systems. Combining the Kagome-lattice structure and the long-range out-of-plane ferromagnetic order of Co3Sn2S2, we expect that this material is an excellent candidate for observation of the quantum anomalous Hall state in the two-dimensional limit.

    Comment: 22 pages, 5 figures, and 1 supporting file
    Keywords Condensed Matter - Materials Science
    Subject code 539
    Publishing date 2017-12-18
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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    Inter-library loan at ZB MED

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