Projekt

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Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen

Titel Englisch Superconductivity and magnetism in strongly correlated electron systems
Gesuchsteller/in Sigrist Manfred
Nummer 126459
Förderungsinstrument Projektförderung (Abt. I-III)
Forschungseinrichtung Institut für Theoretische Physik ETH Zürich
Hochschule ETH Zürich - ETHZ
Hauptdisziplin Theoretische Physik
Beginn/Ende 01.10.2009 - 30.09.2012
Bewilligter Betrag 510'454.00
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Alle Disziplinen (2)

Disziplin
Theoretische Physik
Physik der kondensierten Materie

Keywords (7)

condensed matter theory; strongly correlated electron systems; unconventional superconductivity; non-centrosymmetric superconductors; artificially structured correlated electron system; magnetism; metamagnetism

Lay Summary (Englisch)

Lead
Lay summary
The physics of strongly correlated electrons is one of the most outstanding topics of modern condensed matter physics, because encompasses an immense variety of intriguing states of matter which pose a most formidable challenge to our theoretical understanding of systems with many coupled degree of freedom. The richness of these types of systems are visible in their often highly complex phase diagrams reflecting the subtle competition between various ordered and quantum disordered states. In our project we study among the many exotic phases, in particular, unconventional superconductors characterized by intrinsic symmetries different from ordinary superconductors such as lead or mercury. This includes the development of phenomenological and microscopic theories to identify and understand novel superconductors as well as to predict novel testable properties. Another part of our studies is devoted to quantum phase transitions between different phases, the occurrence of novel phases associated with quantum phase transitions as a function of external parameters such as temperature, magnetic field or pressure. This project also incorporates research towards so-called functional materials with designed properties. For this purpose we investigate here mainly the electronic properties of artificially structured correlated electron systems where we expect to find novel, potentially tunable electronic phases near interfaces between different materials. All these studies involve to a large extent also the development of new theoretical and computational methods to tackle these demanding tasks.
Direktlink auf Lay Summary Letzte Aktualisierung: 21.02.2013

Verantw. Gesuchsteller/in und weitere Gesuchstellende

Mitarbeitende

Publikationen

Publikation
Possible pairing symmetries in SrPtAs with a local lack of inversion center
Goryo Jun, Fischer Mark H., Sigrist Manfred (2012), Possible pairing symmetries in SrPtAs with a local lack of inversion center, in Physcial Review B, 86, 100507-100507.
Essential Configuration of Pb/Ru/Sr2RuO4 Junctions Exhibiting Anomalous Superconducting Interference
Nakamura T, Sumi T, Yonezawa S, Terashima T, Sigrist M, Kaneyasu H, Maeno Y (2012), Essential Configuration of Pb/Ru/Sr2RuO4 Junctions Exhibiting Anomalous Superconducting Interference, in JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 81(6), 064708-064708.
Role of strong spin-orbit coupling in the superconductivity of the hexagonal pnictide SrPtAs
Youn SJ, Fischer MH, Rhim SH, Sigrist M, Agterberg DF (2012), Role of strong spin-orbit coupling in the superconductivity of the hexagonal pnictide SrPtAs, in PHYSICAL REVIEW B, 85(22), 220505-220505.
Electronic and magnetic properties in strongly correlated heterostructures
Ueda S, Kawakami N, Sigrist M (2012), Electronic and magnetic properties in strongly correlated heterostructures, in PHYSICAL REVIEW B, 85(23), 235112-235112.
Properties of edge states in a spin-triplet two-band superconductor
Imai Y, Wakabayashi K, Sigrist M (2012), Properties of edge states in a spin-triplet two-band superconductor, in PHYSICAL REVIEW B, 85(17), 174532-174532.
Locally Non-centrosymmetric Superconductivity in Multilayer Systems
Maruyama D, Sigrist M, Yanase Y (2012), Locally Non-centrosymmetric Superconductivity in Multilayer Systems, in JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 81(3), 034702- 034702.
Coexistence of Ferromagnetism and Superconductivity in Noncentrosymmetric Materials with Cubic Symmetry
Neupert T, Sigrist M (2011), Coexistence of Ferromagnetism and Superconductivity in Noncentrosymmetric Materials with Cubic Symmetry, in JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80(11), 114712-114712.
Superconductivity and local noncentrosymmetricity in crystal lattices
Fischer MH, Loder F, Sigrist M (2011), Superconductivity and local noncentrosymmetricity in crystal lattices, in PHYSICAL REVIEW B, 84(18), 184533-184533.
Ginzburg-Landau Analysis for the Antiferromagnetic Order in the Fulde-Ferrell-Larkin-Ovchinnikov Superconductor
Yanase Y, Sigrist M (2011), Ginzburg-Landau Analysis for the Antiferromagnetic Order in the Fulde-Ferrell-Larkin-Ovchinnikov Superconductor, in JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80(9), 094702-094702.
Extending the Gutzwiller approximation for liquid He-3 by including intersite correlations
Muller D, Pilgram S, Rice TM, Sigrist M (2011), Extending the Gutzwiller approximation for liquid He-3 by including intersite correlations, in ANNALEN DER PHYSIK, 523(8-9), 732-740.
Microscopic model for the semiconductor-to-ferromagnetic-metal transition in FeSi1-xGex Alloys
Yang KY, Yamashita Y, Lauchli AM, Sigrist M, Rice TM (2011), Microscopic model for the semiconductor-to-ferromagnetic-metal transition in FeSi1-xGex Alloys, in EPL, 95(4), 47007-47007.
Topological competition of superconductivity in Pb/Ru/Sr2RuO4 junctions
Nakamura T, Nakagawa R, Yamagishi T, Terashima T, Yonezawa S, Sigrist M, Maeno Y (2011), Topological competition of superconductivity in Pb/Ru/Sr2RuO4 junctions, in PHYSICAL REVIEW B, 84(6), 060512(R)-060512(R).
Magnetic structure of the antiferromagnetic Fulde-Ferrell-Larkin-Ovchinnikov state
Yanase Y, Sigrist M (2011), Magnetic structure of the antiferromagnetic Fulde-Ferrell-Larkin-Ovchinnikov state, in JOURNAL OF PHYSICS-CONDENSED MATTER, 23(9), 094219-094219.
Extreme vortex pinning in the noncentrosymmetric superconductor CePt3 Si
Miclea CF, Mota AC, Nicklas M, Cardoso R, Steglich F, Sigrist M, Prokofiev A, Bauer E (2010), Extreme vortex pinning in the noncentrosymmetric superconductor CePt3 Si, in Physical Review B - Condensed Matter and Materials Physics, 81(1), 014527-014527.
Novel mixed-state thermal transport properties in ultra-clean URu 2Si2
Adachi H, Sigrist M (2010), Novel mixed-state thermal transport properties in ultra-clean URu 2Si2, in Physica C: Superconductivity and its Applications, 470(SUPPL.1), S579-S580.
Slave-boson mean-field study of the dimensional crossover in Sr 2RuO4
Fischer MH, Sigrist M (2010), Slave-boson mean-field study of the dimensional crossover in Sr 2RuO4, in Journal of Physics: Conference Series, 200(SECTION 1), 012034-012034.
Vortex shadow on surface of chiral p-wave superconductors
Yokoyama T, Iniotakis C, Tanaka Y, Sigrist M (2010), Vortex shadow on surface of chiral p-wave superconductors, in Physica C: Superconductivity and its Applications, 470(SUPPL.1), S888-S889.
Phase Transition in the 3-Kelvin Phase of Eutectic Sr2RuO4-Ru
Kaneyasu H, Hayashi N, Gut B, Makoshi K, Sigrist M (2010), Phase Transition in the 3-Kelvin Phase of Eutectic Sr2RuO4-Ru, in JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79(10), 104705-104705.
Dynamical Unbinding Transition in a Periodically Driven Mott Insulator
Hassler F, Ruegg A, Sigrist M, Blatter G (2010), Dynamical Unbinding Transition in a Periodically Driven Mott Insulator, in PHYSICAL REVIEW LETTERS, 104(22), 220402-220402.
Nucleation of Vortex State in Ru-Inclusion in Eutectic Ruthenium Oxide Sr2RuO4-Ru
Kaneyasu H, Sigrist M (2010), Nucleation of Vortex State in Ru-Inclusion in Eutectic Ruthenium Oxide Sr2RuO4-Ru, in JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79(5), 053706-053706.
Functional Superconductor Interfaces from Broken Time-Reversal Symmetry
Brydon PMR, Iniotakis C, Manske D, Sigrist M (2010), Functional Superconductor Interfaces from Broken Time-Reversal Symmetry, in PHYSICAL REVIEW LETTERS, 104(19), 197001-197001.
Z(2)-slave-spin theory for strongly correlated fermions
Ruegg A, Huber SD, Sigrist M (2010), Z(2)-slave-spin theory for strongly correlated fermions, in PHYSICAL REVIEW B, 81(15), 155118-155118.
Influence of the domain walls on the Josephson effect in Sr2RuO4
Bouhon A, Sigrist M (2010), Influence of the domain walls on the Josephson effect in Sr2RuO4, in NEW JOURNAL OF PHYSICS, 12, 043031-043031.
Effect of a staggered spin-orbit coupling on the occurrence of a nematic phase in Sr3Ru2O7
Fischer MH, Sigrist M (2010), Effect of a staggered spin-orbit coupling on the occurrence of a nematic phase in Sr3Ru2O7, in PHYSICAL REVIEW B, 81(6), 064435-064435.
Antiferromagnetic Order and pi-Triplet Pairing in the Fulde-Ferrell-Larkin-Ovchinnikov State
Yanase Y, Sigrist M (2009), Antiferromagnetic Order and pi-Triplet Pairing in the Fulde-Ferrell-Larkin-Ovchinnikov State, in JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 78(11), 114715-114715.
Origin of the checkerboard pattern in scanning tunneling microscopy maps of underdoped cuprate superconductors
Yang KY, Chen WQ, Rice TM, Zhang FC (2009), Origin of the checkerboard pattern in scanning tunneling microscopy maps of underdoped cuprate superconductors, in PHYSICAL REVIEW B, 80(17), 174505-174505.
Probing the dx2-y2-wave Pomeranchuk instability by ultrasound
Adachi Hiroto, Sigrist Manfred (2009), Probing the dx2-y2-wave Pomeranchuk instability by ultrasound, in PHYSICAL REVIEW B, 80(15), 155123-155123.
Quasiparticles in the pseudogap phase of underdoped cuprate
Yang KY, Yang HB, Johnson PD, Rice TM, Zhang FC (2009), Quasiparticles in the pseudogap phase of underdoped cuprate, in EPL, 86(3), 37002-37002.

Zusammenarbeit

Gruppe / Person Land
Formen der Zusammenarbeit
University of Tokyo Japan (Asien)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
Cornell University Vereinigte Staaten von Amerika (Nordamerika)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
Saitama University Japan (Asien)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten

Wissenschaftliche Veranstaltungen

Aktiver Beitrag

Titel Art des Beitrags Titel des Artikels oder Beitrages Datum Ort Beteiligte Personen
QCNP 2012 26.09.2012 Dresden, Deutschland
Japan-Swiss Workshop on "Current Topics in Theory of Correlated Materials'' 11.09.2012 Wako-shi, Japan
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SuperFOX12 19.06.2012 Como, Italien
Condensed Matter Physics in the City 11.06.2012 London, UK
Topological Quantum Phases 2012 17.05.2012 Nagoya, Japan
2012 Hangzhou Workshop on Quantum Matter 02.04.2012 Hangzhou, China
nternationalWorkshop”MAMA-ProTheo: Multifunctional Advanced Materials: Probe and Theory” 19.03.2012 Vietri sul Mare, Italien
Workshop on ”Functionality form heterostructures” 10.10.2011 Obergurgl, Österreich


Auszeichnungen

Titel Jahr
Fellow of the American Physical Society 2011

Verbundene Projekte

Nummer Titel Start Förderungsinstrument
144248 Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen 01.10.2012 Projektförderung (Abt. I-III)
163186 Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen 01.10.2015 Projektförderung (Abt. I-III)
117736 Supraleitung und Magnetismus in stark korrelierten Elektronensystemen 01.10.2007 Projektförderung (Abt. I-III)

Abstract

This project covers several topics in the field of strongly correlated electron systems, with its main focus on unconventional superconductivity, quantum phase transitions and the electronic properties of artificially structured transition metal oxides. The research on unconventional superconductivity addresses several long-standing conceptional questions as well as the interpretation of very recent experimental findings. The focus will be on the chiral p-wave phase for Sr2RuO4 and on the mixed-partiy phase in non-centrosymmetric superconductors. Concerning quantum phase transitions we will mainly be interested in the properties of the puzzling low-temperature phase associated with the metamagnetic transition (a special form of quantum phase transition) in ultra-clean samples of Sr3Ru2O7. The recent developments in fabricating atomically precise superstructures of transition metal oxides motivates us to study theoretically the correlation effects on the electronic reconstruction in the vicinity of interfaces between different materials.
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