Simultaneous current, force and dissipation measurements on the Si(111) 7×7 surface with an optimized qPlus AFM/STM technique

• Zsolt Majzik,
• Martin Setvín,
• Andreas Bettac,
• Albrecht Feltz,
• Vladimír Cháb and
• Pavel Jelínek

Beilstein J. Nanotechnol. 2012, 3, 249–259, doi:10.3762/bjnano.3.28

• sample opens a new horizon in the understanding of elemental processes of the electron transport on surfaces [30] and in clarifying the relationship between the short-range force and the tunneling current in metal contacts [31][32]. Unfortunately, in the case of quartz-based sensors with self-sensing

• . reported a so called “phantom force” phenomenon [30], in which an additional force arises due to a limited electron transport of injected charge in samples with low conductance. However, not much is known currently about its impact on the dissipation signal. In this section we analyze the effect of the

When “small” terms matter: Coupled interference features in the transport properties of cross-conjugated molecules

• Gemma C. Solomon,
• Justin P. Bergfield,
• Charles A. Stafford and
• Mark A. Ratner

Beilstein J. Nanotechnol. 2011, 2, 862–871, doi:10.3762/bjnano.2.95

• supernode [16], these results suggest that devices constructed from multiple cyclic units may be preferable. Conclusion The sensitivity of destructive interference features to perturbations can be seen as both a strength and a weakness of these effects for the control of electron transport in molecules. On

Current-induced dynamics in carbon atomic contacts

• Jing-Tao Lü,
• Tue Gunst,
• Per Hedegård and
• Mads Brandbyge

Beilstein J. Nanotechnol. 2011, 2, 814–823, doi:10.3762/bjnano.2.90

• ][20], their stability [21], and electron-transport properties [22][23][24]. Here we explore the current-induced forces and nanoscale Joule heating of the carbon chain system between electrically gated graphene electrodes. The paper is organized as follows. After a brief outline of the semiclassical

• steady-state electron transport without electron–phonon interaction [33], where AL/R are the density of state matrices for electronic states originating in the left/right electrodes, each with chemical potential μL/R [33], which differ for finite bias voltage, V, as μL − μR = eV, and nF(ω) = 1/(eω/kBT

Effect of the environment on the electrical conductance of the single benzene-1,4-diamine molecule junction

• Shigeto Nakashima,
• Yuuta Takahashi and
• Manabu Kiguchi

Beilstein J. Nanotechnol. 2011, 2, 755–759, doi:10.3762/bjnano.2.83

• coverage of the BDA molecule at metal electrodes and atomic and molecular motion of the single-molecule junction. Keywords: benzene-1,4-diamine; electric conductance; single-molecule junction; solvent; Introduction The electron transport properties through a single molecule bridging metal electrodes

• electrodes themselves. Wu et al. demonstrated that the aromatic π–π coupling between adjacent molecules affected the formation of the molecule junction and electron transport through the molecule junction [6]. Venkataraman’s group and our group independently evaluated the electron-transport properties of π

• -stacked systems [7][8]. We showed that the conductance of the π-stacked system decreased with the number of π molecules, and the decrease in conductance per unit of electron-transport distance was comparable to that of the conventional single-molecule junction. Dahlke et al. investigated the effect of the

Towards quantitative accuracy in first-principles transport calculations: The GW method applied to alkane/gold junctions

• Mikkel Strange and
• Kristian S. Thygesen

Beilstein J. Nanotechnol. 2011, 2, 746–754, doi:10.3762/bjnano.2.82

• results cannot be mimicked by DFT calculations employing a simple scissors operator. Keywords: alkanes; density functional theory; electron transport; gold junction; GW; Introduction The conductance of a molecule sandwiched between metallic electrodes is sensitive to the chemical and electronic

• junction geometry, a quantitatively accurate description of electron transport from first principles remains a formidable task. Numerous studies based on density functional theory (DFT) have shown a significant overestimation of conductance relative to experimental values [3][4][5][6][7][8][9][10][11][12

• approximation to study the role of exchange–correlation effects for the energy-level alignment and electron transport in short alkane chains coupled to gold electrodes through amine linker groups. The gold/alkane junction is a benchmark system for molecular charge transport and has been exhaustively

Interaction of spin and vibrations in transport through single-molecule magnets

• Falk May,
• Maarten R. Wegewijs and
• Walter Hofstetter

Beilstein J. Nanotechnol. 2011, 2, 693–698, doi:10.3762/bjnano.2.75

• Grünberg Institut and JARA - Fundamentals of Information Technology, Forschungszentrum Jülich, 52425 Jülich, Germany 10.3762/bjnano.2.75 Abstract We study electron transport through a single-molecule magnet (SMM) and the interplay of its anisotropic spin with quantized vibrational distortions of the

Transport through molecular junctions

• Jan M. van Ruitenbeek

Beilstein J. Nanotechnol. 2011, 2, 691–692, doi:10.3762/bjnano.2.74

• the problem and inherent to (single) molecular junctions. The study of such junctions requires the gathering of statistics covering many configurations. The field of study of electron transport through molecular junctions requires input from many subdisciplines and this interdisciplinary character

Simple theoretical analysis of the photoemission from quantum confined effective mass superlattices of optoelectronic materials

• Debashis De,
• Sitangshu Bhattacharya,
• S. M. Adhikari,
• A. Kumar,
• P. K. Bose and
• K. P. Ghatak

Beilstein J. Nanotechnol. 2011, 2, 339–362, doi:10.3762/bjnano.2.40

• effective mass when it is energy dependent. Under degenerate conditions, only the electrons at the Fermi surface of n-type semiconductors participate in the conduction process and hence, the effective momentum mass of the electrons (EMM), corresponding to the Fermi level, would be of interest in electron

• transport under such conditions. The Fermi energy is again determined by the carrier energy spectrum and the carrier concentration and therefore, these two features would determine the dependence of the EMM in degenerate materials on the degree of carrier degeneracy. In recent years, the EMM in such