Physical Review Letters

/Physical Review Letters

Elaboration of Nanomagnet Arrays: Organization and Magnetic Properties of Mass-Selected FePt Nanoparticles Deposited on Epitaxially Grown Graphene on Ir(111)

2019-03-14T20:34:45+00:00March 14th, 2019|Categories: Publications|Tags: |

Author(s): Pierre Capiod, Laurent Bardotti, Alexandre Tamion, Olivier Boisron, Clément Albin, Véronique Dupuis, Gilles Renaud, Philippe Ohresser, and Florent TournusThe moiré pattern created by the epitaxy of a graphene sheet on an iridium substrate can be used as a template for the growth of 2D atomic or cluster arrays. We observed for the first time a coherent organization of hard magnetic preformed FePt nanoparticles on the 2D lattice of graphene on Ir(111)….[Phys. Rev. Lett. 122, 106802] Published Thu Mar 14, 2019

Published in: "Physical Review Letters".

Direct Cation Exchange in Monolayer ${mathrm{MoS}}_{2}$ via Recombination-Enhanced Migration

2019-03-14T14:35:57+00:00March 14th, 2019|Categories: Publications|Tags: |

Author(s): Shi-Ze Yang, Weiwei Sun, Yu-Yang Zhang (张余洋), Yongji Gong, Mark P. Oxley, Andrew R. Lupini, Pulickel M. Ajayan, Matthew F. Chisholm, Sokrates T. Pantelides, and Wu Zhou (周武)In addition to their unique optical and electronic properties, two-dimensional materials provide opportunities to directly observe atomic-scale defect dynamics. Here we use scanning transmission electron microscopy to observe substitutional Re impurities in monolayer MoS2 undergo direct exchanges wi…[Phys. Rev. Lett. 122, 106101] Published Mon Mar 11, 2019

Published in: "Physical Review Letters".

Metallic Phase and Temperature Dependence of the $ν=0$ Quantum Hall State in Bilayer Graphene

2019-03-05T16:34:51+00:00March 5th, 2019|Categories: Publications|Tags: |

Author(s): Jing Li, Hailong Fu, Zhenxi Yin, Kenji Watanabe, Takashi Taniguchi, and Jun ZhuThe ν=0 quantum Hall state of bilayer graphene is a fertile playground to realize many-body ground states with various broken symmetries. Here we report the experimental observations of a previously unreported metallic phase. The metallic phase resides in the phase space between the previously ident…[Phys. Rev. Lett. 122, 097701] Published Tue Mar 05, 2019

Published in: "Physical Review Letters".

Magnetoterahertz Response and Faraday Rotation from Massive Dirac Fermions in the Topological Crystalline Insulator ${mathrm{Pb}}_{0.5}{mathrm{Sn}}_{0.5}mathrm{Te}$

2019-03-04T14:34:41+00:00March 4th, 2019|Categories: Publications|

Author(s): Bing Cheng, P. Taylor, P. Folkes, Charles Rong, and N. P. ArmitagePb1−xSnxTe has been shown to be an interesting tunable topological crystalline insulator system. We present a magnetoterahertz spectroscopic study of thin films of Pb0.5Sn0.5Te. The complex Faraday rotation angle and optical conductivity in the circular basis are extracted without any additional ass…[Phys. Rev. Lett. 122, 097401] Published Mon Mar 04, 2019

Published in: "Physical Review Letters".

Negative Friction Coefficients in Superlubric Graphite–Hexagonal Boron Nitride Heterojunctions

2019-02-21T14:36:48+00:00February 21st, 2019|Categories: Publications|Tags: |

Author(s): Davide Mandelli, Wengen Ouyang, Oded Hod, and Michael UrbakhNegative friction coefficients, where friction is reduced upon increasing normal load, are predicted for superlubric graphite–hexagonal boron nitride heterojunctions. The origin of this counterintuitive behavior lies in the load-induced suppression of the moiré superstructure out-of-plane distortion…[Phys. Rev. Lett. 122, 076102] Published Thu Feb 21, 2019

Published in: "Physical Review Letters".

Charge Order in the Holstein Model on a Honeycomb Lattice

2019-02-20T00:39:19+00:00February 19th, 2019|Categories: Publications|

Author(s): Y.-X. Zhang, W.-T. Chiu, N. C. Costa, G. G. Batrouni, and R. T. ScalettarThe effect of electron-electron interactions on Dirac fermions, and the possibility of an intervening spin-liquid phase between the semimetal and antiferromagnetic (AF) regimes, has been a focus of intense quantum simulation effort over the last five years. We use determinant quantum Monte Carlo sim…[Phys. Rev. Lett. 122, 077602] Published Tue Feb 19, 2019

Published in: "Physical Review Letters".

Charge-Density-Wave Transitions of Dirac Fermions Coupled to Phonons

2019-02-20T00:39:17+00:00February 19th, 2019|Categories: Publications|

Author(s): Chuang Chen, Xiao Yan Xu, Zi Yang Meng, and Martin HohenadlerThe spontaneous generation of charge-density-wave order in a Dirac fermion system via the natural mechanism of electron-phonon coupling is studied in the framework of the Holstein model on the honeycomb lattice. Using two independent and unbiased quantum Monte Carlo methods, the phase diagram as a f…[Phys. Rev. Lett. 122, 077601] Published Tue Feb 19, 2019

Published in: "Physical Review Letters".

Fractionalization Waves in Two-Dimensional Dirac Fermions: Quantum Imprint from One Dimension

2019-02-15T04:34:47+00:00February 15th, 2019|Categories: Publications|

Author(s): Seth M. Davis and Matthew S. FosterParticle fractionalization is believed to orchestrate the physics of many strongly correlated systems, yet its direct experimental detection remains a challenge. We propose a simple measurement for an ultracold matter system, in which correlations in initially decoupled 1D chains are imprinted via q…[Phys. Rev. Lett. 122, 065302] Published Thu Feb 14, 2019

Published in: "Physical Review Letters".

Normal and Anomalous Diffusion in Soft Lorentz Gases

2019-02-14T20:34:49+00:00February 14th, 2019|Categories: Publications|

Author(s): Rainer Klages, Sol Selene Gil Gallegos, Janne Solanpää, Mika Sarvilahti, and Esa RäsänenMotivated by electronic transport in graphenelike structures, we study the diffusion of a classical point particle in Fermi potentials situated on a triangular lattice. We call this system a soft Lorentz gas, as the hard disks in the conventional periodic Lorentz gas are replaced by soft repulsive s…[Phys. Rev. Lett. 122, 064102] Published Thu Feb 14, 2019

Published in: "Physical Review Letters".

Bright Luminescence from Indirect and Strongly Bound Excitons in h-BN

2019-02-12T20:34:36+00:00February 12th, 2019|Categories: Publications|Tags: |

Author(s): Léonard Schué, Lorenzo Sponza, Alexandre Plaud, Hakima Bensalah, Kenji Watanabe, Takashi Taniguchi, François Ducastelle, Annick Loiseau, and Julien BarjonA quantitative analysis of the excitonic luminescence efficiency in hexagonal boron nitride (h-BN) is carried out by cathodoluminescence in the ultraviolet range and compared with zinc oxide and diamond single crystals. A high quantum yield value of ∼50% is found for h-BN at 10 K comparable to that …[Phys. Rev. Lett. 122, 067401] Published Tue Feb 12, 2019

Published in: "Physical Review Letters".

Near Ground-State Cooling of Two-Dimensional Trapped-Ion Crystals with More than 100 Ions

2019-02-07T18:34:25+00:00February 7th, 2019|Categories: Publications|

Author(s): Elena Jordan, Kevin A. Gilmore, Athreya Shankar, Arghavan Safavi-Naini, Justin G. Bohnet, Murray J. Holland, and John J. BollingerA laser scheme cools more than a hundred vibrational modes of a 2D crystal to close to their quantum mechanical ground state.[Phys. Rev. Lett. 122, 053603] Published Thu Feb 07, 2019

Published in: "Physical Review Letters".

Resonance Microwave Measurements of an Intrinsic Spin-Orbit Coupling Gap in Graphene: A Possible Indication of a Topological State

2019-02-01T15:23:26+00:00February 1st, 2019|Categories: Publications|Tags: , |

Author(s): J. Sichau, M. Prada, T. Anlauf, T. J. Lyon, B. Bosnjak, L. Tiemann, and R. H. BlickIn 2005, Kane and Mele [Phys. Rev. Lett. 95, 226801 (2005)] predicted that at sufficiently low energy, graphene exhibits a topological state of matter with an energy gap generated by the atomic spin-orbit interaction. However, this intrinsic gap has not been measured to this date. In this Letter, we…[Phys. Rev. Lett. 122, 046403] Published Fri Feb 01, 2019

Published in: "Physical Review Letters".

Doping-Induced Second-Harmonic Generation in Centrosymmetric Graphene from Quadrupole Response

2019-01-28T14:34:38+00:00January 28th, 2019|Categories: Publications|Tags: |

Author(s): Yu Zhang, Di Huang, Yuwei Shan, Tao Jiang, Zhihong Zhang, Kaihui Liu, Lei Shi, Jinluo Cheng, John E. Sipe, Wei-Tao Liu, and Shiwei WuA monolayer of graphene yields strong second-harmonic generation when electrically doped and excited at oblique incidence.[Phys. Rev. Lett. 122, 047401] Published Mon Jan 28, 2019

Published in: "Physical Review Letters".

Spin-Polarization Control Driven by a Rashba-Type Effect Breaking the Mirror Symmetry in Two-Dimensional Dual Topological Insulators

2019-01-25T14:44:20+00:00January 25th, 2019|Categories: Publications|

Author(s): Carlos Mera Acosta and Adalberto FazzioThree-dimensional topological insulators protected by both the time reversal (TR) and mirror symmetries were recently predicted and observed. Two-dimensional materials featuring this property and their potential for device applications have been less explored. We find that, in these systems, the spi…[Phys. Rev. Lett. 122, 036401] Published Fri Jan 25, 2019

Published in: "Physical Review Letters".

Competing Fractional Quantum Hall and Electron Solid Phases in Graphene

2019-01-18T14:35:08+00:00January 18th, 2019|Categories: Publications|Tags: |

Author(s): Shaowen Chen, Rebeca Ribeiro-Palau, Kang Yang, Kenji Watanabe, Takashi Taniguchi, James Hone, Mark O. Goerbig, and Cory R. DeanGraphene shows a many-body phase arising from competition between an electron solid and the fractional quantum Hall effect.[Phys. Rev. Lett. 122, 026802] Published Fri Jan 18, 2019

Published in: "Physical Review Letters".

Kohn-Luttinger Superconductivity in Twisted Bilayer Graphene

2019-01-18T14:35:02+00:00January 18th, 2019|Categories: Publications|Tags: |

Author(s): J. González and T. StauberWe show that the recently observed superconductivity in twisted bilayer graphene (TBG) can be explained as a consequence of the Kohn-Luttinger (KL) instability which leads to an effective attraction between electrons with originally repulsive interaction. Usually, the KL instability takes place at e…[Phys. Rev. Lett. 122, 026801] Published Fri Jan 18, 2019

Published in: "Physical Review Letters".

Quantum Effects in a Mechanically Modulated Single-Photon Emitter

2019-01-14T16:33:49+00:00January 14th, 2019|Categories: Publications|Tags: |

Author(s): Mehdi Abdi and Martin B. PlenioRecent observation of quantum emitters in monolayers of hexagonal boron nitride (h-BN) has provided a novel platform for optomechanical experiments where the single-photon emitters can couple to the motion of a freely suspended h-BN membrane. Here, we propose a scheme where the electronic degree of …[Phys. Rev. Lett. 122, 023602] Published Mon Jan 14, 2019

Published in: "Physical Review Letters".

Quantum Effects in a Mechanically Modulated Single-Photon Emitter

2019-01-14T16:33:48+00:00January 14th, 2019|Categories: Publications|Tags: |

Author(s): Mehdi Abdi and Martin B. PlenioRecent observation of quantum emitters in monolayers of hexagonal boron nitride (h-BN) has provided a novel platform for optomechanical experiments where the single-photon emitters can couple to the motion of a freely suspended h-BN membrane. Here, we propose a scheme where the electronic degree of …[Phys. Rev. Lett. 122, 023602] Published Mon Jan 14, 2019

Published in: "Physical Review Letters".

Quantum Paraelastic Two-Dimensional Materials

2019-01-09T14:35:12+00:00January 9th, 2019|Categories: Publications|Tags: |

Author(s): Tyler B. Bishop, Erin E. Farmer, Afsana Sharmin, Alejandro Pacheco-Sanjuan, Pierre Darancet, and Salvador Barraza-LopezWe study the elastic energy landscape of two-dimensional tin oxide (SnO) monolayers and demonstrate a transition temperature of Tc=8.5±1.8  K using ab initio molecular dynamics (MD) that is close to the value of the elastic energy barrier J derived from T=0  K density functional theory calculations….[Phys. Rev. Lett. 122, 015703] Published Wed Jan 09, 2019

Published in: "Physical Review Letters".

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