B. Keimer

Publications642
h-index64
Citations18,027
Highly Influential Citations246
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From quantum matter to high-temperature superconductivity in copper oxides
TLDR
The discovery of high-temperature superconductivity in the copper oxides in 1986 triggered a huge amount of innovative scientific inquiry but unresolved issues include the astonishing complexity of the phase diagram, the unprecedented prominence of various forms of collective fluctuations, and the simplicity and insensitivity to material details of the ‘normal’ state at elevated temperatures.
Charge Order Driven by Fermi-Arc Instability in Bi2Sr2−xLaxCuO6+δ
TLDR
Together with earlier observations of electronic order in other cuprate families, these findings suggest the existence of a generic charge-ordered state in underdoped cuprates and uncover its intimate connection to the pseudogap regime.
Long-Range Incommensurate Charge Fluctuations in (Y,Nd)Ba2Cu3O6+x
A State of High Tc Superconductivity There are strong indications that high-temperature superconductivity in the cuprates is formed amid competing orders, but only two have been observed…
Emergent phenomena at oxide interfaces.
TLDR
Recent technical advances in the atomic-scale synthesis of oxide heterostructures have provided a fertile new ground for creating novel states at their interfaces, with characteristic feature is the reconstruction of the charge, spin and orbital states at interfaces on the nanometre scale.
Strain and composition dependence of orbital polarization in nickel oxide superlattices
A combined analysis of x-ray absorption and resonant reflectivity data was used to obtain the orbital polarization profiles of superlattices composed of four-unit-cell-thick layers of metallic LaNiO3…
Resonant x-ray scattering study of charge-density wave correlations in YBa 2 Cu 3 O 6 + x
We report the results a comprehensive study of charge density wave (CDW) correlations in untwinned YBCO6+x single crystals with 0.4 0.09) an enhancement of the signal when an external magnetic field…
Neutron scattering study of the magnetic phase diagram of underdoped YBa2Cu3O6+x
We present a neutron triple-axis and resonant spin-echo spectroscopy study of the spin correlations in untwinned YBa2Cu3O6+x single crystals with x=0.3, 0.35 and 0.45 as a function of temperature and…
Dimensionality Control of Electronic Phase Transitions in Nickel-Oxide Superlattices
The structure of metal-oxide superlattices is used to control the electronic order of the system. The competition between collective quantum phases in materials with strongly correlated electrons…
Orbital reflectometry of oxide heterostructures.
TLDR
It is shown that it is possible to derive quantitative, spatially resolved orbital polarization profiles from soft-X-ray reflectivity data, without resorting to model calculations, and is sensitive enough to resolve differences of ~3% in the occupation of Ni e(g) orbitals in adjacent atomic layers of a LaNiO( 3)-LaAlO(3) superlattice.
Orbital control of noncollinear magnetic order in nickel oxide heterostructures.
TLDR
R resonant x-ray diffraction data indicate a spiral state whose polarization plane can be controlled by adjusting the Ni d-orbital occupation via two independent mechanisms: epitaxial strain and spatial confinement of the valence electrons.
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