Nature Physics

/Nature Physics

Author Correction: Even-denominator fractional quantum Hall states at an isospin transition in monolayer graphene

2018-10-29T16:35:25+00:00October 29th, 2018|Categories: Publications|Tags: |

Author Correction: Even-denominator fractional quantum Hall states at an isospin transition in monolayer grapheneAuthor Correction: Even-denominator fractional quantum Hall states at an isospin transition in monolayer graphene, Published online: 29 October 2018; doi:10.1038/s41567-018-0344-0Author Correction: Even-denominator fractional quantum Hall states at an isospin transition in monolayer graphene

Published in: "Nature Physics".

Excess resistivity in graphene superlattices caused by umklapp electron–electron scattering

2018-10-15T16:38:58+00:00October 15th, 2018|Categories: Publications|Tags: |

Excess resistivity in graphene superlattices caused by umklapp electron–electron scatteringExcess resistivity in graphene superlattices caused by umklapp electron–electron scattering, Published online: 15 October 2018; doi:10.1038/s41567-018-0278-6An increase in electrical resistance caused by the fundamental process of electrons scattering off of each other (umklapp scattering) is observed in graphene superlattice devices. This will limit the electrical properties of such devices.

Published in: "Nature Physics".

Biexcitonic optical Stark effects in monolayer molybdenum diselenide

2018-07-30T16:34:21+00:00July 30th, 2018|Categories: Publications|Tags: |

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

Published in: "Nature Physics".

Publisher Correction: Long-distance spin transport through a graphene quantum Hall antiferromagnet

2018-07-09T18:33:56+00:00July 9th, 2018|Categories: Publications|Tags: |

Publisher Correction: Long-distance spin transport through a graphene quantum Hall antiferromagnetPublisher Correction: Long-distance spin transport through a graphene quantum Hall antiferromagnet, Published online: 09 July 2018; doi:10.1038/s41567-018-0237-2Publisher Correction: Long-distance spin transport through a graphene quantum Hall antiferromagnet

Published in: "Nature Physics".

Superlight inverse Doppler effect

2018-07-09T16:34:20+00:00July 9th, 2018|Categories: Publications|Tags: |

Superlight inverse Doppler effectSuperlight inverse Doppler effect, Published online: 09 July 2018; doi:10.1038/s41567-018-0209-6The authors theoretically investigate a novel form of a Doppler effect in homogeneous systems with positive refractive index that occurs under certain conditions. It is suggested that this Doppler effect can be experimentally separated from other Doppler effects by using polaritons such as those found in graphene.

Published in: "Nature Physics".

Electrically switchable Berry curvature dipole in the monolayer topological insulator WTe<sub>2</sub>

2018-07-02T16:34:57+00:00July 2nd, 2018|Categories: Publications|Tags: |

Electrically switchable Berry curvature dipole in the monolayer topological insulator WTe2Electrically switchable Berry curvature dipole in the monolayer topological insulator WTe<sub>2</sub>, Published online: 02 July 2018; doi:10.1038/s41567-018-0189-6Optoelectronic experiments show that a monolayer of WTe2 is a material that simultaneously has topological electronic states and electron wavefunctions with a dipole in their Berry curvature.

Published in: "Nature Physics".

Even-denominator fractional quantum Hall states at an isospin transition in monolayer graphene

2018-07-02T16:34:56+00:00July 2nd, 2018|Categories: Publications|Tags: |

Even-denominator fractional quantum Hall states at an isospin transition in monolayer grapheneEven-denominator fractional quantum Hall states at an isospin transition in monolayer graphene, Published online: 02 July 2018; doi:10.1038/s41567-018-0190-0Quantum Hall states are observed in monolayer graphene at even-denominator fractional filling of the lowest Landau level. This is linked to transitions in the spin and valley structure of the ground state.

Published in: "Nature Physics".

United in a monolayer

2018-07-02T16:34:55+00:00July 2nd, 2018|Categories: Publications|

United in a monolayerUnited in a monolayer, Published online: 02 July 2018; doi:10.1038/s41567-018-0196-7Recent experiments demonstrate that effects arising from quantum geometrical phases and band structure topology can coexist in two-dimensional materials, and can be addressed via optoelectronic experiments.

Published in: "Nature Physics".

Long-distance spin transport through a graphene quantum Hall antiferromagnet

2018-06-11T16:34:20+00:00June 11th, 2018|Categories: Publications|Tags: |

Long-distance spin transport through a graphene quantum Hall antiferromagnetLong-distance spin transport through a graphene quantum Hall antiferromagnet, Published online: 11 June 2018; doi:10.1038/s41567-018-0161-5Spins are transmitted over a distance of 5 μm through a piece of antiferromagnetic graphene. This shows that graphene can be a platform to explore the fundamental physics of spin transport in antiferromagnets for application in spintronics.

Published in: "Nature Physics".

Momentum-space indirect interlayer excitons in transition-metal dichalcogenide van der Waals heterostructures

2018-04-30T16:34:00+00:00April 30th, 2018|Categories: Publications|Tags: , , |

Momentum-space indirect interlayer excitons in transition-metal dichalcogenide van der Waals heterostructuresMomentum-space indirect interlayer excitons in transition-metal dichalcogenide van der Waals heterostructures, Published online: 30 April 2018; doi:10.1038/s41567-018-0123-yA new type of exciton is observed in transition-metal dichalcogenide heterobilayers that is indirect in both real space and momentum space. It consists of a paired electron in MoS2 at the K point and hole spread across MoS2 and WSe2 at the Γ point.

Published in: "Nature Physics".

Giant spin-splitting and gap renormalization driven by trions in single-layer WS<sub>2</sub>/h-BN heterostructures

2018-01-22T16:31:41+00:00January 22nd, 2018|Categories: Publications|Tags: , , |

Giant spin-splitting and gap renormalization driven by trions in single-layer WS2/h-BN heterostructuresGiant spin-splitting and gap renormalization driven by trions in single-layer WS<sub>2</sub>/h-BN heterostructures, Published online: 22 January 2018; doi:10.1038/s41567-017-0033-4A microfocused angle-resolved photoemission spectroscopy study of single layers of WS2 on hexagonal boron nitride reveals that, upon electron doping, trionic interactions cause a giant increase of the spin splitting in the valence band.

Published in: "Nature Physics".

Superconductivity in few-layer stanene

2018-01-15T18:31:54+00:00January 15th, 2018|Categories: Publications|Tags: |

Superconductivity in few-layer staneneSuperconductivity in few-layer stanene, Published online: 15 January 2018; doi:10.1038/s41567-017-0031-6Stanene is a single sheet of tin atoms. Here, it is shown that a few stacked layers of stanene can be a superconductor. Changing the thickness of the substrate modifies the form of superconductivity and critical temperature.

Published in: "Nature Physics".

Ligand-field helical luminescence in a 2D ferromagnetic insulator

2017-12-04T16:34:39+00:00December 4th, 2017|Categories: Publications|

Ligand-field helical luminescence in a 2D ferromagnetic insulatorLigand-field helical luminescence in a 2D ferromagnetic insulator, Published online: 04 December 2017; doi:10.1038/s41567-017-0006-7Atomically thin chromium tri-iodide is shown to be a 2D ferromagnetic insulator with an optical response dominated by ligand-field transitions, emitting circularly polarized photoluminescence with a helicity determined by the magnetization direction.

Published in: "Nature Physics".

Strongly anisotropic spin relaxation in graphene–transition metal dichalcogenide heterostructures at room temperature

2017-12-04T16:34:39+00:00December 4th, 2017|Categories: Publications|Tags: , |

Strongly anisotropic spin relaxation in graphene–transition metal dichalcogenide heterostructures at room temperatureStrongly anisotropic spin relaxation in graphene–transition metal dichalcogenide heterostructures at room temperature, Published online: 04 December 2017; doi:10.1038/s41567-017-0019-2Large spin–orbit coupling can be induced when graphene interfaces with semiconducting transition metal dichalcogenides, leading to strongly anisotropic spin dynamics. As a result, orientation-dependent spin relaxation is observed.

Published in: "Nature Physics".

When lost in a multiverse

2017-11-02T10:29:45+00:00November 2nd, 2017|Categories: Publications|Tags: |

When lost in a multiverseWhen lost in a multiverse, Published online: 02 November 2017; doi:10.1038/nphys4310NatureArticleSnippet(type=standfirst, markup=Wonder material graphene makes metrology practical and relaxed, says Andre Geim., isJats=true)

Published in: "Nature Physics".

Anomalous dispersion of microcavity trion-polaritons

2017-10-30T18:30:28+00:00October 30th, 2017|Categories: Publications|Tags: |

Anomalous dispersion of microcavity trion-polaritonsNature Physics, Published online: 30 October 2017; doi:10.1038/nphys4303A study of the strong coupling of different exciton species in two-dimensional molybdenum diselenide in a cavity uncovers the rich many-body physics and may lead to new devices.

Published in: "Nature Physics".

Sign reversal of the order parameter in (Li<sub>1−<i>x</i></sub>Fe<sub><i>x</i></sub>)OHFe<sub>1−<i>y</i></sub>Zn<sub><i>y</i></sub>Se

2017-10-24T18:30:26+00:00October 24th, 2017|Categories: Publications|Tags: |

Sign reversal of the order parameter in (Li1−xFex)OHFe1−yZnySeNature Physics, Published online: 23 October 2017; doi:10.1038/nphys4299A scanning tunnelling microscopy study of an intercalated iron selenide-based superconductor reveals a sign change in its superconducting gap function, providing indirect evidence for the origin of the pairing mechanism in this system.

Published in: "Nature Physics".

Stripes developed at the strong limit of nematicity in FeSe film

2017-10-05T14:30:46+00:00October 5th, 2017|Categories: Publications|Tags: |

Nature Physics 13, 957 (2017). doi:10.1038/nphys4186 Authors: Wei Li, Yan Zhang, Peng Deng, Zhilin Xu, S.-K. Mo, Ming Yi, Hao Ding, M. Hashimoto, R. G. Moore, D.-H. Lu, Xi Chen, Z.-X. Shen & Qi-Kun Xue A single monolayer of iron selenide grown on strontium titanate shows an impressive enhancement of superconductivity compared with the bulk, as well as a novel Fermi surface topology, extreme two-dimensionality, and the possibility of phonon-enhanced electron pairing. For films thicker than one unit cell, however, the electronic structure is markedly different, with a drastically suppressed superconductivity and strong nematicity appearing. The physics driving this extraordinary dichotomy of superconducting behaviour is far from clear. Here, we use low-temperature scanning tunnelling microscopy to study multilayers of iron selenide grown by molecular beam epitaxy, and find a stripe-type charge ordering instability that develops beneath the nematic state. The charge ordering is visible and pinned in the vicinity of impurities. And as it emerges in the strong limit of nematicity, it suggests that a magnetic fluctuation with a rather small wavevector may be competing with the ordinary collinear antiferromagnetic ordering in multilayer films. The existence of stripes in iron-based superconductors, which resemble the stripe order in cuprates, not only suggests that electronic anisotropy and correlation are playing an important role, but also provides a platform for probing the complex interactions between nematicity, charge ordering, magnetism and superconductivity in high-temperature superconductors.

Published in: "Nature Physics".

Direct optical detection of Weyl fermion chirality in a topological semimetal

2017-09-05T10:30:23+00:00September 5th, 2017|Categories: Publications|

Nature Physics 13, 842 (2017). doi:10.1038/nphys4146 Authors: Qiong Ma, Su-Yang Xu, Ching-Kit Chan, Cheng-Long Zhang, Guoqing Chang, Yuxuan Lin, Weiwei Xie, Tomás Palacios, Hsin Lin, Shuang Jia, Patrick A. Lee, Pablo Jarillo-Herrero & Nuh Gedik A Weyl semimetal is a novel topological phase of matter, in which Weyl fermions arise as pseudo-magnetic monopoles in its momentum space. The chirality of the Weyl fermions, given by the sign of the monopole charge, is central to the Weyl physics, since it directly serves as the sign of the topological number and gives rise to exotic properties such as Fermi arcs and the chiral anomaly. Here, we directly detect the chirality of the Weyl fermions by measuring the photocurrent in response to circularly polarized mid-infrared light. The resulting photocurrent is determined by both the chirality of Weyl fermions and that of the photons. Our results pave the way for realizing a wide range of theoretical proposals for studying and controlling the Weyl fermions and their associated quantum anomalies by optical and electrical means. More broadly, the two chiralities, analogous to the two valleys in two-dimensional materials, lead to a new degree of freedom in a three-dimensional crystal with potential novel pathways to store and carry information.

Published in: "Nature Physics".

Some say, that 2D Research is the best website in the world.