Physical Review Letters

/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".

Gate-Tunable Topological Flat Bands in Trilayer Graphene Boron-Nitride Moiré Superlattices

2019-01-03T14:33:29+00:00January 3rd, 2019|Categories: Publications|Tags: |

Author(s): Bheema Lingam Chittari, Guorui Chen, Yuanbo Zhang, Feng Wang, and Jeil JungWe investigate the electronic structure of the flat bands induced by moiré superlattices and electric fields in nearly aligned ABC trilayer graphene (TLG) boron-nitride (BN) interfaces where Coulomb effects can lead to correlated gapped phases. Our calculations indicate that valley-spin resolved iso…[Phys. Rev. Lett. 122, 016401] Published Thu Jan 03, 2019

Published in: "Physical Review Letters".

Pressure-Induced Electronic and Structural Phase Evolution in the van der Waals Compound ${mathrm{FePS}}_{3}$

2018-12-28T14:33:21+00:00December 28th, 2018|Categories: Publications|

Author(s): C. R. S. Haines, M. J. Coak, A. R. Wildes, G. I. Lampronti, C. Liu, P. Nahai-Williamson, H. Hamidov, D. Daisenberger, and S. S. SaxenaTwo-dimensional materials have proven to be a prolific breeding ground of new and unstudied forms of magnetism and unusual metallic states, particularly when tuned between their insulating and metallic phases. Here we present work on a new metal-to-insulator transition system FePS3. This compound is…[Phys. Rev. Lett. 121, 266801] Published Fri Dec 28, 2018

Published in: "Physical Review Letters".

Ultraflatbands and Shear Solitons in Moiré Patterns of Twisted Bilayer Transition Metal Dichalcogenides

2018-12-28T14:33:19+00:00December 28th, 2018|Categories: Publications|

Author(s): Mit H. Naik and Manish JainUltraflatbands in twisted bilayers of two-dimensional materials have the potential to host strong correlations, including the Mott-insulating phase at half-filling of the band. Using first-principles density functional theory calculations, we show the emergence of ultraflatbands at the valence band …[Phys. Rev. Lett. 121, 266401] Published Fri Dec 28, 2018

Published in: "Physical Review Letters".

Interface-Governed Deformation of Nanobubbles and Nanotents Formed by Two-Dimensional Materials

2018-12-26T14:33:25+00:00December 26th, 2018|Categories: Publications|Tags: , |

Author(s): Zhaohe Dai, Yuan Hou, Daniel A. Sanchez, Guorui Wang, Christopher J. Brennan, Zhong Zhang, Luqi Liu, and Nanshu LuThe height and radius of bubble and tent shapes formed in graphene and MoS2 provide estimates of strain distribution in these 2D materials.[Phys. Rev. Lett. 121, 266101] Published Wed Dec 26, 2018

Published in: "Physical Review Letters".

Platform for Electrically Pumped Polariton Simulators and Topological Lasers

2018-12-21T14:33:41+00:00December 21st, 2018|Categories: Publications|Tags: |

Author(s): Holger Suchomel, Sebastian Klembt, Tristan H. Harder, Martin Klaas, Oleg A. Egorov, Karol Winkler, Monika Emmerling, Ronny Thomale, Sven Höfling, and Christian SchneiderTwo-dimensional electronic materials such as graphene and transition metal dichalgenides feature unique electrical and optical properties due to the conspirative effect of band structure, orbital coupling, and crystal symmetry. Synthetic matter, as accomplished by artificial lattice arrangements of …[Phys. Rev. Lett. 121, 257402] Published Fri Dec 21, 2018

Published in: "Physical Review Letters".

Nonlinear Atom-Plasmon Interactions Enabled by Nanostructured Graphene

2018-12-21T14:33:35+00:00December 21st, 2018|Categories: Publications|Tags: |

Author(s): Joel D. Cox and F. Javier García de AbajoElectrically tunable graphene plasmons are anticipated to enable strong light-matter interactions with resonant quantum emitters. However, plasmon resonances in graphene are typically limited to infrared frequencies, below those of optical excitations in robust quantum light sources and many biologi…[Phys. Rev. Lett. 121, 257403] Published Fri Dec 21, 2018

Published in: "Physical Review Letters".

Accelerated Search and Design of Stretchable Graphene Kirigami Using Machine Learning

2018-12-20T14:33:33+00:00December 20th, 2018|Categories: Publications|Tags: |

Author(s): Paul Z. Hanakata, Ekin D. Cubuk, David K. Campbell, and Harold S. ParkMaking kirigami-inspired cuts into a sheet has been shown to be an effective way of designing stretchable materials with metamorphic properties where the 2D shape can transform into complex 3D shapes. However, finding the optimal solutions is not straightforward as the number of possible cutting pat…[Phys. Rev. Lett. 121, 255304] Published Thu Dec 20, 2018

Published in: "Physical Review Letters".

Valley Subband Splitting in Bilayer Graphene Quantum Point Contacts

2018-12-20T14:33:28+00:00December 20th, 2018|Categories: Publications|Tags: |

Author(s): R. Kraft, I. V. Krainov, V. Gall, A. P. Dmitriev, R. Krupke, I. V. Gornyi, and R. DanneauWe report a study of one-dimensional subband splitting in a bilayer graphene quantum point contact in which quantized conductance in steps of 4e2/h is clearly defined down to the lowest subband. While our source-drain bias spectroscopy measurements reveal an unconventional confinement, we observe a …[Phys. Rev. Lett. 121, 257703] Published Thu Dec 20, 2018

Published in: "Physical Review Letters".

Topologically Nontrivial Valley States in Bilayer Graphene Quantum Point Contacts

2018-12-20T14:33:24+00:00December 20th, 2018|Categories: Publications|Tags: |

Author(s): Hiske Overweg, Angelika Knothe, Thomas Fabian, Lukas Linhart, Peter Rickhaus, Lucien Wernli, Kenji Watanabe, Takashi Taniguchi, David Sánchez, Joachim Burgdörfer, Florian Libisch, Vladimir I. Fal’ko, Klaus Ensslin, and Thomas IhnWe present measurements of quantized conductance in electrostatically induced quantum point contacts in bilayer graphene. The application of a perpendicular magnetic field leads to an intricate pattern of lifted and restored degeneracies with increasing field: at zero magnetic field the degeneracy o…[Phys. Rev. Lett. 121, 257702] Published Thu Dec 20, 2018

Published in: "Physical Review Letters".

Theory of Phonon-Mediated Superconductivity in Twisted Bilayer Graphene

2018-12-17T20:33:33+00:00December 17th, 2018|Categories: Publications|Tags: |

Author(s): Fengcheng Wu, A. H. MacDonald, and Ivar MartinWe present a theory of phonon-mediated superconductivity in near magic angle twisted bilayer graphene. Using a microscopic model for phonon coupling to moiré band electrons, we find that phonons generate attractive interactions in both s- and d-wave pairing channels and that the attraction is strong…[Phys. Rev. Lett. 121, 257001] Published Mon Dec 17, 2018

Published in: "Physical Review Letters".

Prospects for the Detection of Electronic Preturbulence in Graphene

2018-12-05T16:33:39+00:00December 5th, 2018|Categories: Publications|Tags: |

Author(s): A. Gabbana, M. Polini, S. Succi, R. Tripiccione, and F. M. D. PellegrinoBased on extensive numerical simulations, accounting for electrostatic interactions and dissipative electron-phonon scattering, we propose experimentally realizable geometries capable of sustaining electronic preturbulence in graphene samples. In particular, preturbulence is predicted to occur at ex…[Phys. Rev. Lett. 121, 236602] Published Wed Dec 05, 2018

Published in: "Physical Review Letters".

Quantitative Transport Measurements of Fractional Quantum Hall Energy Gaps in Edgeless Graphene Devices

2018-11-28T16:35:01+00:00November 28th, 2018|Categories: Publications|Tags: , , |

Author(s): H. Polshyn, H. Zhou, E. M. Spanton, T. Taniguchi, K. Watanabe, and A. F. YoungOwing to their wide tunability, multiple internal degrees of freedom, and low disorder, graphene heterostructures are emerging as a promising experimental platform for fractional quantum Hall (FQH) studies. Here, we report FQH thermal activation gap measurements in dual graphite-gated monolayer grap…[Phys. Rev. Lett. 121, 226801] Published Wed Nov 28, 2018

Published in: "Physical Review Letters".

Chiral Spin Density Wave and $d+id$ Superconductivity in the Magic-Angle-Twisted Bilayer Graphene

2018-11-21T22:33:47+00:00November 21st, 2018|Categories: Publications|Tags: |

Author(s): Cheng-Cheng Liu, Li-Da Zhang, Wei-Qiang Chen, and Fan YangWe model the newly synthesized magic-angle-twisted bilayer graphene superconductor with two px,y-like Wannier orbitals on the superstructure honeycomb lattice, where the hopping integrals are constructed via the Slater-Koster formulism by symmetry analysis. The characteristics exhibited in this simp…[Phys. Rev. Lett. 121, 217001] Published Wed Nov 21, 2018

Published in: "Physical Review Letters".

Unique Gap Structure and Symmetry of the Charge Density Wave in Single-Layer ${mathrm{VSe}}_{2}$

2018-11-09T16:34:20+00:00November 9th, 2018|Categories: Publications|Tags: |

Author(s): P. Chen, Woei Wu Pai, Y.-H. Chan, V. Madhavan, M. Y. Chou, S.-K. Mo, A.-V. Fedorov, and T.-C. ChiangSingle layers of transition metal dichalcogenides (TMDCs) are excellent candidates for electronic applications beyond the graphene platform; many of them exhibit novel properties including charge density waves (CDWs) and magnetic ordering. CDWs in these single layers are generally a planar projectio…[Phys. Rev. Lett. 121, 196402] Published Fri Nov 09, 2018

Published in: "Physical Review Letters".

Moiré Valleytronics: Realizing Dense Arrays of Topological Helical Channels

2018-11-02T16:34:35+00:00November 2nd, 2018|Categories: Publications|Tags: , |

Author(s): Chen Hu, Vincent Michaud-Rioux, Wang Yao, and Hong GuoWe propose a general and robust platform, the moiré valleytronics, to realize high-density arrays of 1D topological helical channels in real materials at room temperature. We demonstrate the idea using a long-period 1D moiré pattern of graphene on hBN by first-principles calculation. Through calcula…[Phys. Rev. Lett. 121, 186403] Published Fri Nov 02, 2018

Published in: "Physical Review Letters".

Complex Low Energy Tetrahedral Polymorphs of Group IV Elements from First Principles

2018-10-26T16:33:24+00:00October 26th, 2018|Categories: Publications|Tags: , |

Author(s): Chaoyu He, Xizhi Shi, S. J. Clark, Jin Li, Chris J. Pickard, Tao Ouyang, Chunxiao Zhang, Chao Tang, and Jianxin ZhongThe energy landscape of carbon is exceedingly complex, hosting diverse and important metastable phases, including diamond, fullerenes, nanotubes, and graphene. Searching for structures, especially those with large unit cells, in this landscape is challenging. Here we use a combined stochastic search…[Phys. Rev. Lett. 121, 175701] Published Fri Oct 26, 2018

Published in: "Physical Review Letters".

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