## Contact

Swiss National Science Foundation (SNSF)

Wildhainweg 3P.O. Box

CH-3001 Bern

Phone +41 31 308 22 22

English title | Superconductivity and magnetism in strongly correlated electron systems |
---|---|

Applicant | Sigrist Manfred |

Number | 144248 |

Funding scheme | Project funding (Div. I-III) |

Research institution | Institut für Theoretische Physik ETH Zürich |

Institution of higher education | ETH Zurich - ETHZ |

Main discipline | Theoretical Physics |

Start/End | 01.10.2012 - 30.09.2015 |

Approved amount | 513'608.00 |

Discipline |
---|

Theoretical Physics |

Condensed Matter Physics |

unconventional superconductivity; strongly correlated electron systems; non-centrosymmetric superconductors; heavy Fermion physics; condensed matter theory; heterostructures

Lead |
---|

Lay summary |

This project is built upon the vision that materials with novel properties are of great importance for future scientific developments as well as technological applications. Implications of strong interactions among electrons are a the center of our studies as these are the cause of an immense variety of quantum materials' properties. In our theoretical approach, we target unconventional superconductors in three major directions, concerned with (1) topological properties as in the chiral p-wave superconductor Sr2RuO4, (2) the interplay of superconductivity and magnetism as occurring in the so-called Q-phase of the heavy electron system CeCoIn5 and (3) the influence of spin-orbit coupling as found in metals lacking inversion symmetry. A further part of our project will explore the influence of electron correlation in inhomogeneous systems, in particular, artificially grown heterostructures and superlattices which could be recently fabricated with high atomic precision in transition metal oxides and heavy Fermion compounds. The issue of superconductivity found in the heterostructures SrTiO3/LaAlO3, tunable gate voltage, is again a topic because non-centrosymmetricity and topological aspects play an important role here too, as they do in the superlattices of CeCoIn5/YbCoIn5, alternating layers of heavy electron and usual metals. Moreover, the theoretical analysis of numerous possible phases as well as transport properties at interfaces in heterostructures are a further important goal of our studies, as they may have potential for future quantum materials design. |

Direct link to Lay Summary | Last update: 21.02.2013 |

Name | Institute |
---|

Publication |
---|

Dissipationless Multiferroic Magnonics |

Evidence for Time-Reversal Symmetry Breaking of the Superconducting State near Twin-Boundary Interfaces in FeSe Revealed by Scanning Tunneling Spectroscopy |

Evolution of the filamentary 3-Kelvin phase in Pb-Ru-Sr2RuO4 Josephson junctions |

Leggett Modes and the Anderson-Higgs Mechanism in Superconductors without Inversion Symmetry |

Minimal Model of Spin-Transfer Torque and Spin Pumping Caused by the Spin Hall Effect |

Resonant scattering induced thermopower in one-dimensional disordered systems |

Spontaneous currents in a superconductor with s plus is symmetry |

Surface-State Spin Textures and Mirror Chern Numbers in Topological Kondo Insulators |

Topological Crystalline Superconductivity in Locally Noncentrosymmetric Multilayer Superconductors |

Weyl semimetal from spontaneous inversion symmetry breaking in pyrochlore oxides |

Chiral d-wave superconductivity in SrPtAs |

Current inversion at the edges of a chiral p-wave superconductor |

Effect of the RuO6 Octahedron Rotation at the Sr2RuO4 Surface on Topological Property |

Effect of the RuO6 Octahedron Rotation at the Sr2RuO4 Surface on Topological Property |

Electrical permittivity driven metal-insulator transition in heterostructures of nonpolar Mott and band insulators |

Electrical permittivity driven metal-insulator transition in heterostructures of nonpolar Mott and band insulators |

Ginzburg-Landau Description of Twin Boundaries in Noncentrosymmetric Superconductors |

Josephson effect and triplet-singlet ratio of noncentrosymmetric superconductors |

Limiting mechanism for critical current in topologically frustrated Josephson junctions |

Parity-Mixed Superconductivity in Locally Non-centrosymmetric System |

Quantum transport signatures of chiral edge states in Sr2RuO4 |

Signatures of the helical phase in the critical fields at twin boundaries of noncentrosymmetric superconductors |

Spin superfluidity in coplanar multiferroics |

Superconductors with Staggered Non-centrosymmetricity |

Topological invariants, surface states, and interaction-driven phase transitions in correlated Kondo insulators with cubic symmetry |

Complex-Stripe Phases Induced by Staggered Rashba Spin-Orbit Coupling |

Evidence for superconductivity with broken time-reversal symmetry in locally noncentrosymmetric SrPtAs |

Numerical study of charge transport of overdoped La2-xSrxCuO4 within semiclassical Boltzmann transport theory |

Proximity effects in a topological-insulator/Mott-insulator heterostructure |

Spin currents and spontaneous magnetization at twin boundaries of noncentrosymmetric superconductors |

Spin-Orbit Coupling in Multilayer Superconductors with Charge Imbalance |

Thermoelectric effect of correlated metals: Band-structure effects and the breakdown of Mott's formula |

Topological and edge state properties of a three-band model for Sr2RuO4 |

Model for Magnetic Flux Patterns Induced by the Influence of In-Plane Magnetic Fields on Spatially Inhomogeneous Superconducting Interfaces of LaAlO3-SrTiO3 Bilayers |

Pair-density wave states through spin-orbit coupling in multilayer superconductors |

Group / person | Country |
---|

Types of collaboration |
---|

Prof. Youichi Yanase | Japan (Asia) |

- Publication |

Dr. Yoshiki Imai | Japan (Asia) |

- Publication |

Prof. Yoshiteru Maeno | Japan (Asia) |

- Publication |

Prof. Jun Goryo | Japan (Asia) |

- Publication |

Prof. Andrey Chubukov | United States of America (North America) |

- Publication |

Prof. Ying Liu | United States of America (North America) |

- in-depth/constructive exchanges on approaches, methods or results |

Prof. Yuji Matsuda | Japan (Asia) |

- in-depth/constructive exchanges on approaches, methods or results - Publication |

Prof. Norio Kawakami | Japan (Asia) |

- Publication |

Dr. Michel Kenzelmann | Switzerland (Europe) |

- in-depth/constructive exchanges on approaches, methods or results - Publication |

Prof. Ronny Thomale | Germany (Europe) |

- Publication |

Dr. Dirk Manske | Germany (Europe) |

- Publication |

Prof. Kazushi Aoyama | Japan (Asia) |

- Publication |

Prof. Daniel F. Agterberg | United States of America (North America) |

- in-depth/constructive exchanges on approaches, methods or results - Publication |

Prof. Jean-Marc Triscone | Switzerland (Europe) |

- in-depth/constructive exchanges on approaches, methods or results |

Title | Type of contribution | Title of article or contribution | Date | Place | Persons involved |
---|

Strongly Correlated Topological Insulators: SmB6 and Beyond | Talk given at a conference | Surface-state spin textures and mirror Chern numbers in topological Kondo insulators | 02.06.2015 | Ann Arbor, United States of America | Legner Markus; |

Colloquium at Würzburg University | Individual talk | Unconventional Superconductivity - A matter of Symmetry and Topology | 29.05.2015 | Würzburg, Germany | Sigrist Manfred; |

Symposium on Strongly Correlated Electron Systems | Talk given at a conference | Unconventional Superconductivity - A complex Story with many Twists | 09.05.2015 | Tokyo, Japan | Sigrist Manfred; |

Trends in the Theory of Correlated Materials 2014 | Talk given at a conference | Topological phases and surface states in a cubic Kondo insulator | 05.10.2014 | Tokyo, Japan | Legner Markus; |

Trends in the Theory of Correlated Materials 2014 | Talk given at a conference | Doping induced band shifts and Lifshitz transitions in heavy-fermion metals | 05.10.2014 | Tokyo, Japan | Benlagra Adel; |

IRONIC - Strong Correlations and Unconventional Superconductivity | Talk given at a conference | Artificially Structured Superconductors - Loops, Boundaries and Interfaces | 22.09.2014 | Santa Barbara, United States of America | Sigrist Manfred; |

Seminar at Tohoku University | Individual talk | Aspects of non-centrosymmetricity and topology in novel superconductors | 24.07.2014 | Sendai, Japan | Sigrist Manfred; |

International Conference MultiSuper 2014 | Talk given at a conference | True and nearly Multi-Component Superconductors | 24.06.2014 | Camerino, Italy | Sigrist Manfred; |

ERC Mini-Workshop on Topological Kondo Insulators | Talk given at a conference | opological phases and surface states in a cubic Kondo insulator | 16.06.2014 | Würzburg, Germany | Legner Markus; |

MaP Graduate Symposium 2014 | Poster | Limiting mechanism for critical current in topologically frustrated Josephson junctions | 05.06.2014 | Zürich, Switzerland | Etter Sarah; |

ICTP-ECAR Inauguration Conference, | Talk given at a conference | From Superfluid 3He to Topological Superconductors | 05.05.2014 | Izmir, Turkey | Sigrist Manfred; |

Theory Winter School on "Topological Phases of Condensed Matter" | Poster | Topological phases and correlation effects in a cubic Kondo insulator | 06.01.2014 | Tallahassee, United States of America | Legner Markus; |

Trends in the Theory of Correlated Materials 2013 | Talk given at a conference | Finite Temperature spectra and quasiparticle interferences in Kondo lattices: from light electrons to heavy quasiparticles | 02.10.2013 | Lausanne, Switzerland | Benlagra Adel; |

The International Conference on Strongly Correlated Electron Systems 2013 | Talk given at a conference | Superconductors with staggered non-centrosymmetricity | 05.08.2013 | Tokyo, Japan | Sigrist Manfred; |

The International Conference on Strongly Correlated Electron Systems 2013 | Poster | Doping-induced band shifts and Lifshitz transitions in heavy-fermion metals | 03.08.2013 | Tokyo, Japan | Benlagra Adel; |

Spin Orbit Entanglement: Exotic States of Quantum Matter in Electronic Systems | Poster | The entanglement spectrum for a translationally invariant bipartitioning and its relation to quantum geometry | 22.07.2013 | Dresden, Germany | Legner Markus; |

SPS Annual Meeting 2014 | Poster | Limiting mechanism for critical current in topologically frustrated Josephson junctions | 30.06.2013 | Fribourg, Switzerland | Etter Sarah; |

Swiss Workshop on Materials with Novel Electronic Properties | Poster | The entanglement spectrum for a translationally invariant bipartitioning and its relation to quantum geometry | 24.06.2013 | Les Diablerets, Switzerland | Legner Markus; |

Swiss Workshop on Materials with Novel Electronic Properties | Talk given at a conference | Novel Superconductors from a MaNEP perspective | 24.06.2013 | Les Diablerets, Switzerland | Sigrist Manfred; |

Swiss Workshop on Materials with Novel Electronic Properties | Poster | Finite Temperature spectra and quasiparticle interferences in Kondo lattices: from light electrons to heavy quasiparticles | 24.06.2013 | Les Diablerets, Switzerland | Benlagra Adel; |

Gordon Research Conference (GRC) on Superconductivity | Poster | Topologically frustrated Josephson junctions in chiral superconductors | 11.05.2013 | Les Diablerets, Switzerland | Etter Sarah; |

Seminar at Kyoto University | Individual talk | New features of broken time reversal symmetry in unconventional superconductors | 15.02.2013 | Kyoto, Japan | Sigrist Manfred; |

Global Center of Excellence Conference | Talk given at a conference | Exotic Superconductors - a Matter of Symmetry and Topology | 12.02.2013 | Kyoto, Japan | Sigrist Manfred; |

International Workshop on Topological quantum matters, strongly correlated electrons, and quantum information | Talk given at a conference | Sr2RuO4 and CePt3Si - some features of topological superconductors | 10.01.2013 | Shanghai, China | Sigrist Manfred; |

Seminar at CEA Grenoble | Individual talk | Aspects of Topology and Symmetry in Unconventional Superconductors | 31.10.2012 | Grenoble, France | Sigrist Manfred; |

International Workshop on ”Correlated Electrons at Surfaces and Interfaces” (FOR 1162) | Talk given at a conference | Transport und magnetic properties of heterostructures with strong electron correlations | 01.10.2012 | Würzburg, Germany | Sigrist Manfred; |

Title | Year |
---|

EPL poster prize at the annual Swiss Physical Society meeting 2014 | 2014 |

Number | Title | Start | Funding scheme |
---|

163186 | Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen | 01.10.2015 | Project funding (Div. I-III) |

131809 | Research in Theoretical, Mathematical and Computational Physics | 01.10.2010 | Project funding (Div. I-III) |

126459 | Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen | 01.10.2009 | Project funding (Div. I-III) |

163186 | Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen | 01.10.2015 | Project funding (Div. I-III) |

136299 | Thermoeletric oxides TEO | 01.11.2011 | Sinergia |

Strongly interacting electrons are responsible for a nearly unlimited variety of intriguing states of matter. This project targets a number of open questions which are to a large part concerned with low-temperature phases, mainly unconventional superconductivity and complex states of localized or itinerant electrons in metals and insulators.I. Unconventional superconductivity: This project addresses several classes of unconventional superconductors. Recent experiments show unusual features in the superconductor Sr2RuO4 which are most likely of topological nature, resulting from the chiral p-wave symmetry of the Cooper pairing state. These are the anomalous Josephson effect between Pb and Sr2RuO4 connected via Ru-metal inclusions and the observation of half-quantized vortices in mesoscopic loops. The heavy Fermion superconductor CeCoIn5 shows an unusual low-temperature high-magnetic field phase within the superconducting phase diagram characterized by the coexistence between superconductivity and incommensurate magnetism, the so-called Q-phase. Moreover, the field of superconductivity in non-centrosymmetric materials has been extended recently towards new classes of materials besides the Ce-based heavy Fermion compounds, including superconductors with so-called locally non-centrosymmetric structures which could also have important implications for a other classes of superconductors such as doped topological insulators, pnictide and cuprate superconductors.II. Systems with strongly correlated electrons: The number of artificially structured systems of transition metal oxides is rising at a fast pace. This yields the basis for numerous new electronic phases and unusual transport properties. Most prominent is here the field-tunable superconducting phase at SrTiO3/LaAlO3 interfaces which apparently coexists with ferromagnetism. This has been recently joined by artificially structured CeCoIn5/YbCoIn5 superlattices which show surprising superconducting properties. Here new concepts concerning superconductivity and other electronic phases have to be developed. Interesting are questions concerning non-centrosymmetricity of interfaces and the combination of various ordered and disordered phases.Our project targets important questions on these subjects which in many cases are discussed in close collaboration with the relevant experimental research groups.

Swiss National Science Foundation (SNSF)

Wildhainweg 3P.O. Box

CH-3001 Bern

Phone +41 31 308 22 22

Enter and manage your applications

Enter your e-mail address to receive the SNSF Newsletter regularly

© SNSF 2018