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  1. Article ; Online: Quantum spin driven Yu-Shiba-Rusinov multiplets and fermion-parity-preserving phase transition in K

    Wang, Shu-Ze / Yu, Xue-Qing / Wei, Li-Xuan / Wang, Li / Cheng, Qiang-Jun / Peng, Kun / Cheng, Fang-Jun / Liu, Yu / Li, Fang-Sen / Ma, Xu-Cun / Xue, Qi-Kun / Song, Can-Li

    Science bulletin

    2024  

    Abstract: Magnetic impurities in superconductors are of increasing interest due to emergent Yu-Shiba-Rusinov (YSR) states and Majorana zero modes for fault-tolerant quantum computation. However, a direct relationship between the YSR multiple states and magnetic ... ...

    Abstract Magnetic impurities in superconductors are of increasing interest due to emergent Yu-Shiba-Rusinov (YSR) states and Majorana zero modes for fault-tolerant quantum computation. However, a direct relationship between the YSR multiple states and magnetic anisotropy splitting of quantum impurity spins remains poorly characterized. By using scanning tunneling microscopy, we systematically resolve individual transition-metal (Fe, Cr, and Ni) impurities induced YSR multiplets as well as their Zeeman effects in the K
    Language English
    Publishing date 2024-03-27
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2816140-3
    ISSN 2095-9281 ; 2095-9273
    ISSN (online) 2095-9281
    ISSN 2095-9273
    DOI 10.1016/j.scib.2024.03.052
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Direct Observation of Full-Gap Superconductivity and Pseudogap in Two-Dimensional Fullerides.

    Ren, Ming-Qiang / Han, Sha / Wang, Shu-Ze / Fan, Jia-Qi / Song, Can-Li / Ma, Xu-Cun / Xue, Qi-Kun

    Physical review letters

    2020  Volume 124, Issue 18, Page(s) 187001

    Abstract: Alkali-fulleride superconductors with a maximum critical temperature T_{c}∼40  K exhibit a similar electronic phase diagram to that of unconventional high-T_{c} superconductors. Here we employ cryogenic scanning tunneling microscopy to show that trilayer ...

    Abstract Alkali-fulleride superconductors with a maximum critical temperature T_{c}∼40  K exhibit a similar electronic phase diagram to that of unconventional high-T_{c} superconductors. Here we employ cryogenic scanning tunneling microscopy to show that trilayer K_{3}C_{60} displays fully gapped strong coupling s-wave superconductivity, accompanied by a pseudogap above T_{c}∼22  K and within vortices. A precise control of the electronic correlations and potassium doping enables us to reveal that superconductivity occurs near a superconductor-Mott-insulator transition and reaches maximum at half-filling. The s-wave symmetry retains over the entire phase diagram, which, in conjunction with an abrupt decline of the superconductivity below half-filling, indicates that alkali fullerides are predominantly phonon-mediated superconductors, although the electronic correlations also come into play.
    Language English
    Publishing date 2020-05-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.124.187001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Semiconductor-Metal Phase Transition and Emergent Charge Density Waves in 1

    Ren, Ming-Qiang / Han, Sha / Fan, Jia-Qi / Wang, Li / Wang, Pengdong / Ren, Wei / Peng, Kun / Li, Shujing / Wang, Shu-Ze / Zheng, Fa-Wei / Zhang, Ping / Li, Fangsen / Ma, Xucun / Xue, Qi-Kun / Song, Can-Li

    Nano letters

    2022  Volume 22, Issue 1, Page(s) 476–484

    Abstract: A charge density wave (CDW) is a collective quantum phenomenon in metals and features a wavelike modulation of the conduction electron density. A microscopic understanding and experimental control of this many-body electronic state in atomically thin ... ...

    Abstract A charge density wave (CDW) is a collective quantum phenomenon in metals and features a wavelike modulation of the conduction electron density. A microscopic understanding and experimental control of this many-body electronic state in atomically thin materials remain hot topics in materials physics. By means of material engineering, we realized a dimensionality and Zr intercalation induced semiconductor-metal phase transition in 1
    Language English
    Publishing date 2022-01-03
    Publishing country United States
    Document type Journal Article
    ISSN 1530-6992
    ISSN (online) 1530-6992
    DOI 10.1021/acs.nanolett.1c04372
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  4. Article ; Online: Value of reduced glomerular filtration rate assessment with cardiometabolic index: insights from a population-based Chinese cohort.

    Wang, Hao-Yu / Shi, Wen-Rui / Yi, Xin / Wang, Shu-Ze / Luan, Si-Yuan / Sun, Ying-Xian

    BMC nephrology

    2018  Volume 19, Issue 1, Page(s) 294

    Abstract: Background: Recent studies have suggested that cardiometabolic index (CMI), a novel estimate of visceral adipose tissue, could be of use in the evaluation of cardiovascular risk factors. However, the potential utility and clinical significance of CMI in ...

    Abstract Background: Recent studies have suggested that cardiometabolic index (CMI), a novel estimate of visceral adipose tissue, could be of use in the evaluation of cardiovascular risk factors. However, the potential utility and clinical significance of CMI in the detection of reduced estimated glomerular filtration rate (eGFR) remains uncertain. The purpose of this study was to investigate the usefulness of CMI in assessing reduced eGFR in the general Chinese population.
    Methods: This cross-sectional analysis included 11,578 participants (mean age: 53.8 years, 53.7% females) from Northeast China Rural Cardiovascular Health Study (NCRCHS) of general Chinese population (data collected from January 2013 to August 2013). CMI was calculated by triglyceride to high density lipoprotein cholesterol ratio multiply waist-to-height ratio. Reduced eGFR was defined as eGFR< 60 ml/min per 1.73m
    Results: The prevalence of reduced eGFR was 1.7% in males and 2.5% in females. CMI was notably more adverse in reduced eGFR groups, regardless of genders. In fully adjusted multivariate linear models, each 1 SD increment of CMI caused 3.150 ml/min per 1.73m
    Conclusions: Higher CMI was independently associated with greater burden of reduced eGFR, highlighting VAT distribution and dysfunction as a potential mechanism underlying the association of obesity with kidney damage and adverse cardiovascular outcomes. The findings from this study provided important insights regarding the potential usefulness and clinical relevance of CMI in the detection of reduced eGFR among general Chinese population.
    MeSH term(s) Adult ; Aged ; Cardiovascular Diseases/diagnosis ; Cardiovascular Diseases/epidemiology ; Cardiovascular Diseases/metabolism ; China/epidemiology ; Cholesterol, HDL/blood ; Cohort Studies ; Cross-Sectional Studies ; Female ; Glomerular Filtration Rate/physiology ; Humans ; Intra-Abdominal Fat/metabolism ; Male ; Middle Aged ; Obesity/diagnosis ; Obesity/epidemiology ; Obesity/metabolism ; Population Surveillance ; Renal Insufficiency/diagnosis ; Renal Insufficiency/epidemiology ; Renal Insufficiency/metabolism ; Triglycerides/blood ; Waist-Height Ratio
    Chemical Substances Cholesterol, HDL ; Triglycerides
    Language English
    Publishing date 2018-10-25
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2041348-8
    ISSN 1471-2369 ; 1471-2369
    ISSN (online) 1471-2369
    ISSN 1471-2369
    DOI 10.1186/s12882-018-1098-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Direct Visualization of Ambipolar Mott Transition in Cuprate CuO_{2} Planes.

    Zhong, Yong / Fan, Jia-Qi / Wang, Rui-Feng / Wang, ShuZe / Zhang, Xuefeng / Zhu, Yuying / Dou, Ziyuan / Yu, Xue-Qing / Wang, Yang / Zhang, Ding / Zhu, Jing / Song, Can-Li / Ma, Xu-Cun / Xue, Qi-Kun

    Physical review letters

    2020  Volume 125, Issue 7, Page(s) 77002

    Abstract: Identifying the essence of doped Mott insulators is one of the major outstanding problems in condensed matter physics and the key to understanding the high-temperature superconductivity in cuprates. We report real space visualization of Mott insulator- ... ...

    Abstract Identifying the essence of doped Mott insulators is one of the major outstanding problems in condensed matter physics and the key to understanding the high-temperature superconductivity in cuprates. We report real space visualization of Mott insulator-metal transition in Sr_{1-x}La_{x}CuO_{2+y} cuprate films that cover both the electron- and hole-doped regimes. Tunneling conductance measurements directly on the copper-oxide (CuO_{2}) planes reveal a systematic shift in the Fermi level, while the fundamental Mott-Hubbard band structure remains unchanged. This is further demonstrated by exploring the atomic-scale electronic response of CuO_{2} to substitutional dopants and intrinsic defects in a sister compound Sr_{0.92}Nd_{0.08}CuO_{2}. The results may be better explained in the framework of self-modulation doping, similar to that in semiconductor heterostructures, and form a basis for developing any microscopic theories for cuprate superconductivity.
    Language English
    Publishing date 2020-06-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.125.077002
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    In stock of ZB MED Bonn / Germany

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  6. Book ; Online: Molecular beam epitaxy growth and surface structure of Sr1-xNdxCuO2 cuprate films

    Fan, Jia-Qi / Wang, Shu-Ze / Yu, Xue-Qing / Wang, Rui-Feng / Xiong, Yan-Ling / Song, Can-Li / Ma, Xu-Cun / Xue, Qi-Kun

    2020  

    Abstract: We report on the epitaxial growth and surface structure of infinite-layer cuprate Sr1-xNdxCuO2 films on SrTiO3(001) substrates by combining ozone-assisted molecular beam epitaxy and in situ scanning tunneling microscopy. Careful substrate temperature and ...

    Abstract We report on the epitaxial growth and surface structure of infinite-layer cuprate Sr1-xNdxCuO2 films on SrTiO3(001) substrates by combining ozone-assisted molecular beam epitaxy and in situ scanning tunneling microscopy. Careful substrate temperature and flux control has been used to achieve single-phase, stoichiometric, and c-axis oriented films. The surface of the films is usually characterized by a mixed CuO2 surface and gridlike superstructure. The superstructure exhibits a periodicity of 3.47 nm that corresponds to a coincidence lattice between the overlayer peroxide SrO2 and underlying CuO2 plane, and gives rise to a conductance spectrum that is distinct from the Mott-Hubbard band structure of CuO2. At a higher Nd composition x > 0.1, a (2 x 2) surface characteristic of the hole-doped CuO2 emerges, which we ascribe to the intake of apical oxygens in the intervening Sr planes.

    Comment: 5 pages, 4 figures
    Keywords Condensed Matter - Superconductivity ; Condensed Matter - Materials Science
    Subject code 530
    Publishing date 2020-08-13
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Book ; Online: Coexistence of full-gap superconductivity and pseudogap in two-dimensional fullerides

    Ren, Ming-Qiang / Han, Sha / Wang, Shu-Ze / Fan, Jia-Qi / Song, Can-Li / Ma, Xu-Cun / Xue, Qi-Kun

    2019  

    Abstract: Alkali-fulleride superconductors with a maximum critical temperature Tc of 40 K exhibit similar electronic phase diagram with unconventional high-Tc superconductors where the superconductivity resides proximate to a magnetic Mott-insulating state. ... ...

    Abstract Alkali-fulleride superconductors with a maximum critical temperature Tc of 40 K exhibit similar electronic phase diagram with unconventional high-Tc superconductors where the superconductivity resides proximate to a magnetic Mott-insulating state. However, distinct from cuprate compounds, which superconduct through two-dimensional (2D) CuO2 planes, alkali fullerides are attributed to the three-dimensional (3D) members of high-Tc family. Here, we employ scanning tunneling microscopy to show that trilayer K3C60 displays fully gapped strong coupling s-wave superconductivity that coexists spatially with a cuprate-like pseudogap state above Tc = 22 K and within vortices. A precise control of electronic correlations and doping reveals that superconductivity occurs near a superconductor-Mott insulator transition and reaches maximum at half-filling. The s-wave symmetry retains over the entire phase diagram, which, in conjunction with an abrupt decline of superconductivity below half-filling, demonstrates that alkali fullerides are predominantly phonon-mediated superconductors, although the multiorbital electronic correlations also come into play.

    Comment: 10 pages, 5 figures, supplementary materials
    Keywords Condensed Matter - Superconductivity ; Condensed Matter - Materials Science ; Condensed Matter - Strongly Correlated Electrons
    Subject code 530
    Publishing date 2019-11-20
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Book ; Online: Direct visualization of ambipolar Mott transition in cuprate CuO2 planes

    Zhong, Yong / Fan, Jia-Qi / Wang, Ruifeng / Wang, ShuZe / Zhang, Xuefeng / Zhu, Yuying / Dou, Ziyuan / Yu, Xue-Qing / Wang, Yang / Zhang, Ding / Zhu, Jing / Song, Can-Li / Ma, Xu-Cun / Xue, Qi-Kun

    2019  

    Abstract: Identifying the essence of doped Mott insulators is one of the major outstanding problems in condensed matter physics and the key to understanding the high-temperature superconductivity in cuprates. We report real space visualization of Mott transition ... ...

    Abstract Identifying the essence of doped Mott insulators is one of the major outstanding problems in condensed matter physics and the key to understanding the high-temperature superconductivity in cuprates. We report real space visualization of Mott transition in Sr1-xLaxCuO2+y cuprate films that cover the entire electron- and hole-doped regimes. Tunneling conductance measurements directly on the cooper-oxide (CuO2) planes reveal a systematic shift in the Fermi level, while the fundamental Mott-Hubbard band structure remains unchanged. This is further demonstrated by exploring atomic-scale electronic response of CuO2 to substitutional dopants and intrinsic defects in a sister compound Sr0.92Nd0.08CuO2. The results could be better explained in the framework of self-modulation doping, similar to that in semiconductor heterostructures, and form a basis for developing any microscopic theories for cuprate superconductivity.

    Comment: 5 pages, 4 figures, See Supplemental Material at https://journals.aps.org/prl/supplemental/10.1103/PhysRevLett.125.077002
    Keywords Condensed Matter - Superconductivity ; Condensed Matter - Materials Science ; Condensed Matter - Strongly Correlated Electrons
    Subject code 530
    Publishing date 2019-04-28
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

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