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Nature Physics offers a unique mix of news and reviews alongside top-quality research papers. Published monthly, in print and online, the journal reflects the entire spectrum of physics, pure and applied.
Ενημερώθηκε: πριν από 23 λεπτά 55 δευτερόλεπτα

Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal

Δευ, 30/07/2018 - 00:00

Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal

Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal, Published online: 30 July 2018; doi:10.1038/s41567-018-0234-5

Electrical transport measurements reveal that Co3Sn2S2 is probably a magnetic Weyl semimetal, and hosts the highest simultaneous anomalous Hall conductivity and anomalous Hall angle. This is driven by the strong Berry curvature near the Weyl points.

A little bit of everything

Δευ, 30/07/2018 - 00:00

A little bit of everything

A little bit of everything, Published online: 30 July 2018; doi:10.1038/s41567-018-0258-x

The properties of bismuth have long defied expectation, casting it just outside the bounds of almost every category. Now topology joins the list, as its electronic structure once deemed trivial turns out to have higher-order topology.

Giant anomalous Nernst effect and quantum-critical scaling in a ferromagnetic semimetal

Δευ, 30/07/2018 - 00:00

Giant anomalous Nernst effect and quantum-critical scaling in a ferromagnetic semimetal

Giant anomalous Nernst effect and quantum-critical scaling in a ferromagnetic semimetal, Published online: 30 July 2018; doi:10.1038/s41567-018-0225-6

A magnetic field and temperature gradient produce a large electric potential in a ferromagnet, indicating the possible presence of Weyl points. The specific structure of Weyl points gives the electrons quantum-critical properties.

Time-resolved collapse and revival of the Kondo state near a quantum phase transition

Δευ, 30/07/2018 - 00:00

Time-resolved collapse and revival of the Kondo state near a quantum phase transition

Time-resolved collapse and revival of the Kondo state near a quantum phase transition, Published online: 30 July 2018; doi:10.1038/s41567-018-0228-3

Using terahertz pulses, the quasiparticle dynamics of the heavy-fermion compound CeCu6−xAu are investigated in the vicinity of its quantum critical point.

Biexcitonic optical Stark effects in monolayer molybdenum diselenide

Δευ, 30/07/2018 - 00:00

Biexcitonic optical Stark effects in monolayer molybdenum diselenide

Biexcitonic optical Stark effects in monolayer molybdenum diselenide, Published online: 30 July 2018; doi:10.1038/s41567-018-0216-7

Light–matter interactions in monolayer MoSe2 can be dramatically modified by the interactions between the excitonic states, leading to a rich set of light-driven coherent phenomena.

Witness the fitness

Δευ, 30/07/2018 - 00:00

Witness the fitness

Witness the fitness, Published online: 30 July 2018; doi:10.1038/s41567-018-0245-2

Witness the fitness

Reconstructing the topology of optical polarization knots

Δευ, 30/07/2018 - 00:00

Reconstructing the topology of optical polarization knots

Reconstructing the topology of optical polarization knots, Published online: 30 July 2018; doi:10.1038/s41567-018-0229-2

Knotted lines representing torus knot and figure-eight knot are produced in the polarization profile of optical beams, leading to a topological characterization of the structure of the polarization field.

Transverse transport

Δευ, 30/07/2018 - 00:00

Transverse transport

Transverse transport, Published online: 30 July 2018; doi:10.1038/s41567-018-0240-7

The discovery of large anomalous electronic and thermal transport in candidate magnetic Weyl semimetals reveals another example of the striking features of topological materials.

The dark side of neutrons

Τρί, 24/07/2018 - 00:00

The dark side of neutrons

The dark side of neutrons, Published online: 24 July 2018; doi:10.1038/s41567-018-0261-2

The agent responsible for the accelerated expansion of the Universe is completely unknown. Delicate interference measurements of the quantum transitions of very slow neutrons bouncing on a flat table have constrained an interesting theoretical possibility.

Targeted assembly and synchronization of self-spinning microgears

Δευ, 23/07/2018 - 00:00

Targeted assembly and synchronization of self-spinning microgears

Targeted assembly and synchronization of self-spinning microgears, Published online: 23 July 2018; doi:10.1038/s41567-018-0227-4

Active colloidal particles are shown to be capable of aggregating into stable spinning clusters that constitute self-powered microgears. The demonstration reveals a new design principle for micromachinery using dissipative building blocks.

Complex magnetic order in nickelate slabs

Δευ, 23/07/2018 - 00:00

Complex magnetic order in nickelate slabs

Complex magnetic order in nickelate slabs, Published online: 23 July 2018; doi:10.1038/s41567-018-0218-5

Surprising phenomena are known to occur when magnetic systems are confined to low-dimensional geometries. A resonant X-ray scattering study of NdNiO3 slabs reveals a crossover between different magnetic ground states as a function of thickness.

Acoustic Rabi oscillations between gravitational quantum states and impact on symmetron dark energy

Δευ, 23/07/2018 - 00:00

Acoustic Rabi oscillations between gravitational quantum states and impact on symmetron dark energy

Acoustic Rabi oscillations between gravitational quantum states and impact on symmetron dark energy, Published online: 23 July 2018; doi:10.1038/s41567-018-0205-x

A spectroscopic approach based on the Rabi resonance method is used to probe the quantum states of ultracold neutrons—and thus their interaction with the gravitational potential of the Earth.

A machine from machines

Δευ, 23/07/2018 - 00:00

A machine from machines

A machine from machines, Published online: 23 July 2018; doi:10.1038/s41567-018-0247-0

Building spinning microrotors that self-assemble and synchronize to form a gear sounds like an impossible feat. However, it has now been achieved using only a single type of building block — a colloid that self-propels.

The physics of infinity

Δευ, 23/07/2018 - 00:00

The physics of infinity

The physics of infinity, Published online: 23 July 2018; doi:10.1038/s41567-018-0238-1

David Hilbert famously argued that infinity cannot exist in physical reality. The consequence of this statement — still under debate today — has far-reaching implications.

Experimental evidence for ultrafast intermolecular relaxation processes in hydrated biomolecules

Δευ, 23/07/2018 - 00:00

Experimental evidence for ultrafast intermolecular relaxation processes in hydrated biomolecules

Experimental evidence for ultrafast intermolecular relaxation processes in hydrated biomolecules, Published online: 23 July 2018; doi:10.1038/s41567-018-0214-9

The authors study intermolecular Coulomb decay that occurs in a sample of THF and water in a reaction microscope employing triple-coincidence measurements of two ions and one electron. They find that ICD is a previously unconsidered effect between water and other organic molecules that are hydrogen-bonded, with ICD outpacing proton transfer.

Doping the holographic Mott insulator

Δευ, 23/07/2018 - 00:00

Doping the holographic Mott insulator

Doping the holographic Mott insulator, Published online: 23 July 2018; doi:10.1038/s41567-018-0217-6

A generalized Mott-insulating state is found theoretically starting from a holographic model. The state has features in common with the conventional variety, and upon doping shares striking similarities with the stripe phases found in cuprates.

Publisher Correction: Maximal spontaneous photon emission and energy loss from free electrons

Δευ, 23/07/2018 - 00:00

Publisher Correction: Maximal spontaneous photon emission and energy loss from free electrons

Publisher Correction: Maximal spontaneous photon emission and energy loss from free electrons, Published online: 23 July 2018; doi:10.1038/s41567-018-0252-3

Publisher Correction: Maximal spontaneous photon emission and energy loss from free electrons

Author Correction: Pair-breaking quantum phase transition in superconducting nanowires

Τετ, 18/07/2018 - 00:00

Author Correction: Pair-breaking quantum phase transition in superconducting nanowires

Author Correction: Pair-breaking quantum phase transition in superconducting nanowires, Published online: 18 July 2018; doi:10.1038/s41567-018-0251-4

Author Correction: Pair-breaking quantum phase transition in superconducting nanowires

Entropic effects in cell lineage tree packings

Δευ, 16/07/2018 - 00:00

Entropic effects in cell lineage tree packings

Entropic effects in cell lineage tree packings, Published online: 16 July 2018; doi:10.1038/s41567-018-0202-0

The organization of small clusters of connected cells confined to an egg chamber during early development can be mapped onto a tree packing problem. Entropically preferred packing configurations are shown to arise more readily in experiment.

Maximal spontaneous photon emission and energy loss from free electrons

Δευ, 16/07/2018 - 00:00

Maximal spontaneous photon emission and energy loss from free electrons

Maximal spontaneous photon emission and energy loss from free electrons, Published online: 16 July 2018; doi:10.1038/s41567-018-0180-2

Calculating the amount of radiation that can ultimately be extracted from free electrons near an arbitrary material structure is a challenge. Now, an upper limit to the spontaneous photon emission of electrons is demonstrated, regardless of geometry.

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