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Moir\'e superlattices of van der Waals heterostructures provide a powerful new way to engineer the electronic structures of two-dimensional (2D) materials. Many novel quantum phenomena have emerged in different moir\'e heterostructures,…

Anisotropic electronic transport is a possible route towards nanoscale circuitry design, particularly in two-dimensional materials. Proposals to introduce such a feature in patterned graphene have to date relied on large-scale structural…

Mesoscale and Nanoscale Physics · Physics 2018-12-07 Soren Schou Gregersen , Jose H. Garcia , Antti-Pekka Jauho , Stephan Roche , Stephen R. Power

We present anisotropic, zero applied magnetic field, temperature dependent resistivity measurements on hexagonal, non-magnetic, YPtIn and LuAgGe single crystals. For these materials the in-plane resistivity, $\rho_{ab}$, is significantly…

Materials Science · Physics 2009-11-11 G. D. Samolyuk , S. L. Bud'ko , E. Morosan , V. P. Antropov , P. C. Canfield

A Stillinger-Weber interatomic potential is parameterized for phosphorene. It well reproduces the crystal structure, cohesive energy and phonon dispersion predicted by first-principles calculations. The thermal conductivity of phosphorene…

Mesoscale and Nanoscale Physics · Physics 2015-10-19 Wen Xu , Liyan Zhu , Yongqing Cai , Gang Zhang , Baowen Li

Strain is prominent in fabricated samples of two-dimensional semiconductors and it also serves as an exploitable tool for engineering their properties. However, quantifying strain and characterizing its spatially inhomogeneous distribution…

Materials Science · Physics 2014-09-01 Ruixiang Fei , Li Yang

The capacity and stability of constituent electrodes determine the performance of Li-ion batteries. In this study, density functional theory is employed to explore the potential application of recently synthesized two dimensional…

Mesoscale and Nanoscale Physics · Physics 2014-09-24 Shijun Zhao , Wei Kang

The Forster resonant energy transfer mechanism (FRET) is investigated in optically driven and electrically gated tunnel coupled quantum dot molecules. Two novel FRET induced optical signatures are found in the dressed excitonic spectrum.…

Mesoscale and Nanoscale Physics · Physics 2009-06-18 Juan E. Rolon , Sergio E. Ulloa

The dominant phonon wavevectors $q^{*}$ probed by the 2D Raman mode of graphene are highly anisotropic and rotate with the orientation of the polarizer:analyzer direction relative to the lattice. The corresponding electronic transitions…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 Rohit Narula , Nicola Bonini , Nicola Marzari , Stephanie Reich

The energy transport of acoustic phonons generated by the optical excitation of a quantum dot as well as the coherence properties of these phonons are studied theoretically both for the case of a pulsed excitation and for a continuous wave…

Mesoscale and Nanoscale Physics · Physics 2015-06-18 D. Wigger , S. Lüker , D. E. Reiter , V. M. Axt , P. Machnikowski , T. Kuhn

The newly emerging monolayer phosphorene was recently predicted to be a promising thermoelectric material. In this work, we propose to further enhance the thermoelectric performance of phosphorene by the strain-induced band convergence. The…

Mesoscale and Nanoscale Physics · Physics 2015-06-22 H. Y. Lv , W. J. Lu , D. F. Shao , Y. P. Sun

We study the transport properties of charge carriers in phosphorene with a mass term through double barriers. The solutions of the energy spectrum are obtained and the dependence of the eigenvalues on the barrier potentials and wave vectors…

Mesoscale and Nanoscale Physics · Physics 2022-05-11 Jilali Seffadi , Ilham Redouani , Youness Zahidi , Ahmed Jellal

We study the reflection and transmission properties of a system comprising two whispering-gallery mode resonators, each containing a Zeeman-split quantum dot and side-coupled to an optical fiber. Our results demonstrate that unidirectional…

Quantum Physics · Physics 2023-08-21 Gang Li , Ying-Qiao Zhang , Xing-Ri Jin

Achieving highly transmitting molecular junctions through resonant transport at low bias is key to the next-generation low-power molecular devices. Although, resonant transport in molecular junctions was observed by connecting a molecule…

Mesoscale and Nanoscale Physics · Physics 2023-08-09 Biswajit Pabi , Štepán Marek , Adwitiya Pal , Puja Kumari , Soumya Jyoti Ray , Arunabha Thakur , Richard Korytár , Atindra Nath Pal

We study transport properties of a phosphorene monolayer in the presence of single and multiple potential barriers of height $U_0$ and width $d$, using both continuum and microscopic lattice models, and show that the nature of electron…

Mesoscale and Nanoscale Physics · Physics 2017-06-28 Sangita De Sarkar , Amit Agarwal , K. Sengupta

By means of a multi-scale first-principles approach, a description of the local electronic structure of two-dimensional and narrow phosphorene sheets with various types of modifications is presented. First, a rational argument based on the…

Materials Science · Physics 2016-02-03 Alejandro Lopez-Bezanilla

The first order standard perturbation theory combined with ab initio projector augmented wave operator challenges the realization of the standard Sternheimer equation with linear computational efficiency. This efficiency motivates us to…

Materials Science · Physics 2018-10-05 Sushant Kumar Behera , Pritam Deb

Black phosphorus has been revisited recently as a new two-dimensional material showing potential applications in electronics and optoelectronics. Here we report the anisotropic in-plane thermal conductivity of suspended few-layer black…

Mesoscale and Nanoscale Physics · Physics 2015-10-20 Zhe Luo , Jesse Maassen , Yexin Deng , Yuchen Du , Richard P. Garrelts , Mark S. Lundstrom , Peide D. Ye , Xianfan Xu

The structural, magnetic and electronic properties of transition metal oxides reflect in atomic charge, spin and orbital degrees of freedom. Resonant x-ray scattering (RXS) allows us to perform an accurate investigation of all these…

Strongly Correlated Electrons · Physics 2015-05-14 G. Subías , Joaquín García , Blasco Javier , Javier Herrero-Martin , María Concepción Sanchez

The vibrational and electronic properties of 2-dimensinal (2D) materials can be efficiently tuned by external strain due to their good stretchability. Resonant Raman spectroscopy is a versatile tool to study the physics of phonons,…

Mesoscale and Nanoscale Physics · Physics 2019-06-05 Chaoyu Song , Fengren Fan , Ningning Xuan , Shenyang Huang , Chong Wang , Guowei Zhang , Fanjie Wang , Qiaoxia Xing , Yuchen Lei , Zhengzong Sun , Hua Wu , Hugen Yan

In a network of interacting quantum systems achieving fast coherent energy transfer is a challenging task. While quantum systems are susceptible to a wide range of environmental factors, in many physical settings their interactions with…

Quantum Physics · Physics 2014-05-09 James Lim , Mark Tame , Ki Hyuk Yee , Joong-Sung Lee , Jinhyoung Lee
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