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Jung S, Jang H, Kim J, Park J, Lee S, Seo S, Bauer ED, Park T. A Quenched Disorder in the Quantum-Critical Superconductor CeCoIn 5. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2304837. [PMID: 37985882 PMCID: PMC10767398 DOI: 10.1002/advs.202304837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 10/20/2023] [Indexed: 11/22/2023]
Abstract
Emergent inhomogeneous electronic phases in metallic quantum systems are crucial for understanding high-Tc superconductivity and other novel quantum states. In particular, spin droplets introduced by nonmagnetic dopants in quantum-critical superconductors (QCSs) can lead to a novel magnetic state in superconducting phases. However, the role of disorders caused by nonmagnetic dopants in quantum-critical regimes and their precise relation with superconductivity remain unclear. Here, the systematic evolution of a strong correlation between superconductive intertwined electronic phases and antiferromagnetism in Cd-doped CeCoIn5 is presented by measuring current-voltage characteristics under an external pressure. In the low-pressure coexisting regime where antiferromagnetic (AFM) and superconducting (SC) orders coexist, the critical current (Ic ) is gradually suppressed by the increasing magnetic field, as in conventional type-II superconductors. At pressures higher than the critical pressure where the AFM order disappears, Ic remarkably shows a sudden spike near the irreversible magnetic field. In addition, at high pressures far from the critical pressure point, the peak effect is not suppressed, but remains robust over the whole superconducting region. These results indicate that magnetic islands are protected around dopant sites despite being suppressed by the increasingly correlated effects under pressure, providing a new perspective on the role of quenched disorders in QCSs.
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Affiliation(s)
- Soon‐Gil Jung
- Department of Physics EducationSunchon National UniversitySuncheon57922South Korea
| | - Harim Jang
- Department of PhysicsSungkyunkwan UniversitySuwon16419South Korea
| | - Jihyun Kim
- Department of PhysicsSungkyunkwan UniversitySuwon16419South Korea
| | - Jin‐Hong Park
- Department of PhysicsSungkyunkwan UniversitySuwon16419South Korea
| | - Sangyun Lee
- Los Alamos National LaboratoryAlamosNM87545USA
| | - Soonbeom Seo
- Department of PhysicsChangwon National UniversityChangwon51140South Korea
| | | | - Tuson Park
- Center for Quantum Materials and Superconductivity (CQMS)Department of PhysicsSungkyunkwan UniversitySuwon16419South Korea
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Direct measurement of the evolution of magnetism and superconductivity toward the quantum critical point. Proc Natl Acad Sci U S A 2022; 119:e2209549119. [PMID: 36442120 PMCID: PMC9894194 DOI: 10.1073/pnas.2209549119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Nontrivial quantum states can be realized in the vicinity of the quantum critical point (QCP) in many strongly correlated electron systems. In particular, an emergence of unconventional superconductivity around the QCP strongly suggests that the quantum critical fluctuations play a central role in the superconducting pairing mechanism. However, a clear signature of the direct coupling between the superconducting pairing states and the quantum criticality has not yet been elucidated by the microscopic probes. Herein, we present muon spin rotation/relaxation and neutron diffraction measurements in the superconducting dome of CeCo(In1 - xZnx)5. It was found that a magnetically ordered state develops at x≥ 0.03, coexisting with the superconductivity. The magnitude of the ordered magnetic moment is continuously reduced with decreasing x, and it disappears below x∼ 0.03, indicating a second-order phase transition and the presence of the QCP at this critical Zn concentration. Furthermore, the magnetic penetration depth diverges toward the QCP. These facts provide evidence for the intimate coupling between quantum criticality and Cooper pairing.
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Wlodarczyk D, Amilusik M, Kosyl KM, Chrunik M, Lawniczak-Jablonska K, Strankowski M, Zajac M, Tsiumra V, Grochot A, Reszka A, Suchocki A, Giela T, Iwanowski P, Bockowski M, Przybylinska H. Synthesis Attempt and Structural Studies of Novel A 2CeWO 6 Double Perovskites (A 2+ = Ba, Ca) in and outside of Ambient Conditions. ACS OMEGA 2022; 7:18382-18408. [PMID: 35694470 PMCID: PMC9178617 DOI: 10.1021/acsomega.2c00669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 04/21/2022] [Indexed: 05/25/2023]
Abstract
This comprehensive work showcases two novel, rock-salt-type minerals in the form of amphoteric cerium-tungstate double perovskite and ilmenite powders created via a high-temperature solid-state reaction in inert gases. The presented studies have fundamental meaning and will mainly focus on a detailed synthesis description of undoped structures, researching their possible polymorphism in various conditions and hinting at some nontrivial physicochemical properties like charge transfer for upcoming optical studies after eventual doping with selectively chosen rare-earth ions. The formerly mentioned, targeted A2BB'X6 group of compounds contains mainly divalent alkali cations in the form of XIIA = Ba2+, Ca2+ sharing, here, oxygen-arranged clusters (IIX = O2-) with purposely selected central ions from f-block VIB = Ce4/3+ and d-block VIB' = W4/5/6+ since together they often possess some exotic properties that could be tuned and implemented into futuristic equipment like sensors or energy converters. Techniques like powder XRD, XPS, XAS, EPR, Raman, and FTIR spectroscopies alongside DSC and TG were involved with an intent to thoroughly describe any possible changes within these materials. Mainly, to have a full prospect of any desirable or undesirable phenomena before diving into more complicated subjects like: energy or charge transfer in low temperatures; to reveal whether or not the huge angular tilting generates large enough dislocations within the material's unit cell to change its initial properties; or if temperature and pressure stimuli are responsible for any phase transitions and eventual, irreversible decomposition.
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Affiliation(s)
- Damian Wlodarczyk
- Institute
of Physics, Polish Academy of Sciences, Ave. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Mikolaj Amilusik
- Institute
of High Pressure, Polish Academy of Sciences, Sokolowska 29/37, PL-01142 Warsaw, Poland
| | - Katarzyna M. Kosyl
- Institute
of Physics, Polish Academy of Sciences, Ave. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Maciej Chrunik
- Military
University of Technology, Gen. Sylwestra Kaliskiego 2, PL-00908 Warsaw, Poland
| | | | - Michal Strankowski
- Chemical
Faculty, Gdansk University of Technology, G. Narutowicza 11/12, PL-80233 Gdansk, Poland
| | - Marcin Zajac
- Solaris
Synchrotron NSRC, Jagiellonian University, Czerwone Maki 98, PL-30392 Cracow, Poland
| | - Volodymyr Tsiumra
- Institute
of Physics, Polish Academy of Sciences, Ave. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Aneta Grochot
- Institute
of Physics, Polish Academy of Sciences, Ave. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Anna Reszka
- Institute
of Physics, Polish Academy of Sciences, Ave. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Andrzej Suchocki
- Institute
of Physics, Polish Academy of Sciences, Ave. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Tomasz Giela
- Solaris
Synchrotron NSRC, Jagiellonian University, Czerwone Maki 98, PL-30392 Cracow, Poland
| | - Przemyslaw Iwanowski
- Institute
of Physics, Polish Academy of Sciences, Ave. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Michal Bockowski
- Institute
of High Pressure, Polish Academy of Sciences, Sokolowska 29/37, PL-01142 Warsaw, Poland
| | - Hanka Przybylinska
- Institute
of Physics, Polish Academy of Sciences, Ave. Lotnikow 32/46, PL-02668 Warsaw, Poland
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Gyenis A, da Silva Neto EH, Sutarto R, Schierle E, He F, Weschke E, Kavai M, Baumbach RE, Thompson JD, Bauer ED, Fisk Z, Damascelli A, Yazdani A, Aynajian P. Quasi-particle interference of heavy fermions in resonant x-ray scattering. SCIENCE ADVANCES 2016; 2:e1601086. [PMID: 27757422 PMCID: PMC5065254 DOI: 10.1126/sciadv.1601086] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 09/16/2016] [Indexed: 06/06/2023]
Abstract
Resonant x-ray scattering (RXS) has recently become an increasingly important tool for the study of ordering phenomena in correlated electron systems. Yet, the interpretation of RXS experiments remains theoretically challenging because of the complexity of the RXS cross section. Central to this debate is the recent proposal that impurity-induced Friedel oscillations, akin to quasi-particle interference signals observed with a scanning tunneling microscope (STM), can lead to scattering peaks in RXS experiments. The possibility that quasi-particle properties can be probed in RXS measurements opens up a new avenue to study the bulk band structure of materials with the orbital and element selectivity provided by RXS. We test these ideas by combining RXS and STM measurements of the heavy fermion compound CeMIn5 (M = Co, Rh). Temperature- and doping-dependent RXS measurements at the Ce-M4 edge show a broad scattering enhancement that correlates with the appearance of heavy f-electron bands in these compounds. The scattering enhancement is consistent with the measured quasi-particle interference signal in the STM measurements, indicating that the quasi-particle interference can be probed through the momentum distribution of RXS signals. Overall, our experiments demonstrate new opportunities for studies of correlated electronic systems using the RXS technique.
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Affiliation(s)
- András Gyenis
- Joseph Henry Laboratories and Department of Physics, Princeton University, Princeton, NJ 08544, USA
| | - Eduardo H. da Silva Neto
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
- Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
- Quantum Materials Program, Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada
| | - Ronny Sutarto
- Canadian Light Source, Saskatoon, Saskatchewan S7N 2V3, Canada
| | - Enrico Schierle
- Helmholtz-Zentrum Berlin fürMaterialien und Energie, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Feizhou He
- Helmholtz-Zentrum Berlin fürMaterialien und Energie, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Eugen Weschke
- Helmholtz-Zentrum Berlin fürMaterialien und Energie, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Mariam Kavai
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, NY 13902, USA
| | | | | | - Eric D. Bauer
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Zachary Fisk
- Department of Physics and Astronomy, University of California, Irvine, Irvine, CA 92697, USA
| | - Andrea Damascelli
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
- Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Ali Yazdani
- Joseph Henry Laboratories and Department of Physics, Princeton University, Princeton, NJ 08544, USA
| | - Pegor Aynajian
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, NY 13902, USA
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