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Bilayer graphene with an interlayer potential difference has an energy gap and, when the potential difference varies spatially, topologically protected one-dimensional states localized along the difference's zero-lines. When disorder is…

Mesoscale and Nanoscale Physics · Physics 2011-08-11 Zhenhua Qiao , Jeil Jung , Qian Niu , Allan H. MacDonald

Currently, solid interfaces composed of two-dimensional materials (2D) in contact with metal surfaces (m-surf) have been the subject of intense research, where the borophene bilayer (BBL) has been considered a prominent material for the…

Materials Science · Physics 2023-11-21 Wanderlã L. Scopel , F. Crasto de Lima , Pedro H. Souza , José E. Padilha , Roberto H. Miwa

We investigate charge transport in C$_{60}$-based single-molecule junctions with graphene electrodes employing a combination of density functional theory (DFT) electronic structure calculations and Landauer transport theory. In particular,…

Mesoscale and Nanoscale Physics · Physics 2017-01-12 Susanne Leitherer , Pedro B. Coto , Konrad Ullmann , Heiko B. Weber , Michael Thoss

Electronic transport properties for single-molecule junctions have been widely measured by several techniques, including mechanically controllable break junctions, electromigration break junctions or by means of scanning tunneling…

Mesoscale and Nanoscale Physics · Physics 2020-07-22 Ferdinand Evers , Richard Korytár , Sumit Tewari , Jan M. van Ruitenbeek

We investigate the transport properties of charge carriers in AB bilayer graphene through a triple electrostatic barrier. We calculate the transmission and reflection using the continuity conditions at the interfaces of the triple barrier…

Mesoscale and Nanoscale Physics · Physics 2022-11-30 Mouhamadou Hassane Saley , Abderrahim El Mouhafid , Ahmed Jellal , Ahmed Siari

We present ab-initio calculations for the in plane conductivity of Co/Cu multilayer slabs. The electronic structure of the multilayer slabs is calculated by means of density functional theory within a screened KKR scheme. Transport…

Materials Science · Physics 2009-11-07 P. Zahn , N. Papanikolaou , F. Erler , I. Mertig

In this computational work based on density functional theory we study the electronic and electron transport properties of asymmetric multi-layer MoSSe junctions, known as Janus junctions. Focusing on 4-layer systems, we investigate the…

Materials Science · Physics 2021-06-30 Shuanglong Liu , James N. Fry , Hai-Ping Cheng

We present a comprehensive study of the properties of the off-resonant conductance spectrum in oligomer nanojunctions between graphitic electrodes. By employing first-principle-based methods and the Landauer approach of quantum transport,…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Giorgos Fagas , Agapi Kambili

On the basis of the Keldysh method of non-equilibrium systems, we develop a theory of electron tunneling in normal-metal/superconductor junctions. By using the tunneling Hamiltonian model (being appropriate for the tight-binding systems),…

Superconductivity · Physics 2009-10-31 Xin-Zhong Yan , Hongwei Zhao , Chia-Ren Hu

We compute the transmission probability through rectangular potential barriers and p-n junctions in the presence of a magnetic and electric fields in bilayer graphene taking into account contributions from the full four bands of the energy…

Mesoscale and Nanoscale Physics · Physics 2016-05-06 Ahmed Jellal , Ilham Redouani , Hocine Bahlouli

Landauer's formula is the standard theoretical tool to examine ballistic transport in nano- and meso-scale junctions, but it necessitates that any variation of the junction with time must be slow compared to characteristic times of the…

Mesoscale and Nanoscale Physics · Physics 2016-04-25 Daniel Gruss , Kirill A. Velizhanin , Michael Zwolak

We generalize the Landauer formula to describe the dissipative electron transport through a superconducting point contact. The finite-temperature, linear-in-bias, dissipative DC conductance is expressed in terms of the phase- and…

Superconductivity · Physics 2019-08-14 Sergey S. Pershoguba , Thomas Veness , Leonid I. Glazman

The resistance of multilayers with interface roughness on a length scale which is large compared to the atomic spacing is computed in several cases via the Boltzmann equation. This type of roughness is common in magnetic multilayers. When…

Materials Science · Physics 2010-01-12 Jason Alicea , Selman Hershfield

In Bernal stacked bilayer graphene interlayer coupling significantly affects the electronic bandstructure compared to monolayer graphene. Here we present magnetotransport experiments on high-quality $n$-doped bilayer MoS$_{2}$. By measuring…

Mesoscale and Nanoscale Physics · Physics 2019-09-18 Riccardo Pisoni , Tim Davatz , Kenji Watanabe , Takashi Taniguchi , Thomas Ihn , Klaus Ensslin

The linear Boltzmann equation describes the macroscopic transport of a gas of non-interacting point particles in low-density matter. It has wide-ranging applications, including neutron transport, radiative transfer, semiconductors and ocean…

Mathematical Physics · Physics 2015-02-17 Jens Marklof , Andreas Strömbergsson

We investigate quantum transport through strongly disordered barriers, made of a material with exceptionally high resistivity that behaves as an Anderson insulator or a ``bad metal'' in the bulk, by analyzing the distribution of Landauer…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Branislav K. Nikolic , Ralitsa L. Dragomirova

We calculate the tunneling magnetoresistance (TMR) of Fe|ZnSe|Fe|ZnSe|Fe (001) double magnetic tunnel junctions as a function of the in-between Fe layer's thickness, and compare these results with those of Fe|ZnSe|Fe simple junctions. The…

Materials Science · Physics 2013-05-29 Jeronimo Peralta Ramos , Ana Maria Llois

We study ballistic interfacial thermal transport across atomic junctions. Exact expressions for phonon transmission coefficients are derived for thermal transport in one-junction and two-junction chains, and verified by numerical…

Materials Science · Physics 2011-03-02 Lifa Zhang , Pawel Keblinski , Jian-Sheng Wang , Baowen Li

Properties of one-dimensional (1D) arrays of low Ohmic tunnel junctions (i.e. junctions with resistances comparable to, or less than, the quantum resistance $R_{\rm q}\equiv h/e^2\approx 25.8$ k$\Omega$) have been studied experimentally and…

Mesoscale and Nanoscale Physics · Physics 2016-08-31 Sh. Farhangfar , R. S. Poikolainen , J. P. Pekola , D. S. Golubev , A. D. Zaikin

We have combined the Boltzmann transport equation with an {\it ab initio} approach to compute the thermoelectric coefficients of semiconductors. Electron-phonon, ionized impurity, and electron-plasmon scattering rates have been taken into…

Materials Science · Physics 2018-10-26 Z. Wang , S. Wang , S. Obukhov , N. Vast , J. Sjakste , V. Tyuterev , N. Mingo