Journal ArticleDOI
Electrostatic Modulation of Superconductivity in Ultrathin GdBa2Cu3O7-x Films
Chong H. Ahn,Stefano Gariglio,Patrycja Paruch,Thomas Tybell,Louis Antognazza,Jean-Marc Triscone +5 more
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TLDR
The polarization field of the ferroelectric oxide lead zirconate titanate was used to tune the critical temperature of the hightemperature superconducting cuprate gadolinium barium copper oxide in a reversible, nonvolatile fashion.Abstract:
The polarization field of the ferroelectric oxide lead zirconate titanate [Pb(ZrxTi1–x)O3] was used to tune the critical temperature of the hightemperature superconducting cuprate gadolinium barium copper oxide (GdBa2Cu3O7–x) in a reversible, nonvolatile fashion. For slightly underdoped samples, a uniform shift of several Kelvin in the critical temperature was observed, whereas for more underdoped samples, an insulating state was induced. This transition from superconducting to insulating behavior does not involve chemical or crystalline modification of the material.read more
Citations
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Tunable Quasi-Two-Dimensional Electron Gases in Oxide Heterostructures
TL;DR: A large electric-field response of quasi–two-dimensional electron gases generated at interfaces in epitaxial heterostructures grown from insulating oxides is reported, indicating that the conductivity of the electron gases can be modulated through a quantum phase transition from an insulating to a metallic state.
Journal ArticleDOI
Electric-field-induced superconductivity in an insulator
Kazunori Ueno,Shintaro Nakamura,Hidekazu Shimotani,Akira Ohtomo,Noriaki Kimura,Tsutomu Nojima,Haruyoshi Aoki,Yoshihiro Iwasa,Masashi Kawasaki +8 more
TL;DR: Electric-field-induced superconductivity in an insulator is reported by using an electric-double-layer gating in an organic electrolyte using a pristine SrTiO(3) single-crystal channel, indicating this method as promising for searching for unprecedented superconducting states.
Journal ArticleDOI
Ferroelectricity at the Nanoscale: Local Polarization in Oxide Thin Films and Heterostructures
Chong H. Ahn,Chong H. Ahn,Chong H. Ahn,Karin M. Rabe,Karin M. Rabe,Karin M. Rabe,Jean-Marc Triscone,Jean-Marc Triscone,Jean-Marc Triscone +8 more
TL;DR: Not only can the necessary high-quality ferroelectric films now be grown for new device capabilities, but ferroelectrics can be combined with other functional oxides, such as high-temperature superconductors and magnetic oxide, to create multifunctional materials and devices.
Journal ArticleDOI
Magnetoelectric coupling effects in multiferroic complex oxide composite structures.
TL;DR: This Progress Report presents an overview of recent developments in the field, with emphasis on magnetoelectric coupling effects in complex oxide multiferroic composite materials.
Journal ArticleDOI
Collective bulk carrier delocalization driven by electrostatic surface charge accumulation
Masaki Nakano,Keisuke Shibuya,Daisuke Okuyama,Takafumi Hatano,Shimpei Ono,Masashi Kawasaki,Yoshihiro Iwasa,Y. Tokura +7 more
TL;DR: This work prepared metal–insulator–semiconductor field-effect transistors based on vanadium dioxide and found that electrostatic charging at a surface drives all the previously localized charge carriers in the bulk material into motion, leading to the emergence of a three-dimensional metallic ground state.
References
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Journal ArticleDOI
Importance of phase fluctuations in superconductors with small superfluid density
V. J. Emery,Steven A. Kivelson +1 more
TL;DR: In this article, the phase of the order parameter is not important for determining the value of the transition temperature Tc and the change of many physical properties brought about by the transition, and the phase fluctuations, both classical and quantum, may have a significant influence on low-temperature properties.
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Continuous quantum phase transitions
TL;DR: In this paper, a scaling analysis of Josephson-junction arrays and quantum Hall-effect systems is presented, where the authors derive scaling forms for the finite-temperature behavior, which turns out to be described by the theory of finite size scaling.
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Magnetic, transport, and optical properties of monolayer copper oxides
TL;DR: In this paper, the authors review the results of a wide variety of experiments on materials such as weakly coupled antiferromagnetic insulators with very large Heisenberg exchange energies, which become high-temperature superconductors when charge carriers are added to the layers.
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A unified theory based on SO(5) symmetry of superconductivity and antiferromagnetism
TL;DR: The complex phase diagram of high-critical temperature (Tc) superconductors can be deduced from an SO(5) symmetry principle that unifies antiferromagnetism and d-wave superconductivity, resulting in a quantum nonlinear σ model that describes the phase diagram and the effective low-energy dynamics of the system.
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Quantum phase transitions in disordered two-dimensional superconductors.
TL;DR: It is argued that with increasing applied magnetic field, a disordered, superconducting thin film will undergo a zero-temperature transition into an insulating state and the field-induced vortices Bose condense at this superconductor-insulator transition.