Highly conductive molecular junctions were formed by direct binding of benzene molecules between two Pt electrodes. Measurements conductance, isotopic shift in inelastic spectroscopy, and shot noise compared with calculations provide indications for a stable junction where the molecule is preserved intact bonded to leads via carbon atoms. The has conductance comparable that metallic atomic (around 0.1-1G0), number transmission channels are controlled molecule's orientation at different...

Point contact spectroscopy on a H(2)O molecule bridging Pt electrodes reveals clear crossover between enhancement and reduction of the conductance due to electron-vibration interaction. As single-channel models predict such at transmission probability tau=0.5, we used shot noise measurements analyze observed least two channels across junction where dominant channel has tau=0.51 +/- 0.01 conductance, which is consistent with predictions for models.

Abstract Key spin transport phenomena, including magnetoresistance and transfer torque, cannot be activated without spin-polarized currents, in which one electron is dominant. At the nanoscale, relevant length-scale for modern spintronics, current generation rather limited due to unwanted contributions from poorly frontier states ferromagnetic electrodes, or too short length-scales efficient splitting by spin-orbit interaction magnetic fields. Here, we show that currents can generated...

The interaction of individual electrons with vibrations has been extensively studied. However, the nature electron-vibration in presence many-body electron correlations such as a Kondo state not fully investigated. Here, we present transport measurements on Copper-phthalocyanine molecule, suspended between two silver electrodes break-junction setup. Our reveal both zero bias and satellite conductance peaks, which are identified resonances similar temperature. relation peaks to is...

We demonstrate a general procedure for determining the conduction channels of quantum conductors from shot noise measurements. This numerical approach allows multichannel analysis which was previously limited to superconductors. Channel Ag and Au atomic contacts reveals remarkable behavior in fully open one by with increasing conductance. These results allow us unambiguously distinguish between free-electron tight-binding descriptions conductance monovalent contacts. Furthermore, channel...

Using a break junction technique, we find clear signature for the formation of conducting hybrid junctions composed single organic molecule (benzene, naphthalene, or anthracene) connected to chains platinum atoms. The exhibit metallic-like conductance (~0.1-1G0), which is rather insensitive further elongation by additional At low bias voltage can be elongated significantly beyond length bare atomic chains. Ab initio calculations reveal that benzene based have significant binding energy and...

Generating highly spin-polarized currents at the nanoscale is essential for spin current manipulations and spintronic applications. We find indications up to 100% across nickel oxide atomic junctions formed between two electrodes. The degree of polarization probed by analyzing shot noise resulting from discrete statistics electron transport. show that filtering can be significantly enhanced local chemical modifications single-atom level. This approach paves way effective transport...

Recent advances in stochastic thermodynamics unraveled a thermodynamic uncertainty relation (TUR), which is trade-off between cost (dissipation) and precision (fluctuations). In this study, the authors test its validity nanoscale systems. Measurements of electron current noise gold atomic-scale junctions demonstrate that TUR holds quantum coherent system. Based on calculations, go to argue can identify transport mechanisms pinpoint deviations from noninteracting-electron dynamics.

The interplay of electrons with a chiral medium has diverse impact across science and technology, influencing drug separation, chemical reactions, electronic transport1-30. In particular, electron-chirality interactions can significantly affect charge spin transport in conductors, making them highly appealing for spintronics. However, an atomistic mapping different remains elusive. Here, we find that helicene-based single-molecule junctions behave as combined magnetic-diode spin-valve...

Delta-T shot noise is activated in temperature-biased electronic junctions, down to the atomic scale. It characterized by a quadratic dependence on temperature difference and nonlinear relationship with transmission coefficients of partially opened conduction channels. In this work, we demonstrate that delta-T noise, measured across an ensemble atomic-scale can be utilized estimate bias these systems. Our approach employs supervised machine learning algorithm train neural network, input...

Pt is known to show spontaneous formation of monatomic chains upon breaking a metallic contact. From model calculations, these are expected be spin polarized. However, direct experimental evidence for or against magnetism lacking. Here, we investigate shot noise as potential source information on the magnetic state atomic chains. We observe remarkable structure in distribution measured shot-noise levels, where data appear confined region nonmagnetic states. While this suggests ground chains,...

Molecular junctions based on ferromagnetic electrodes allow the study of electronic spin transport near limit spintronics miniaturization. However, these reveal moderate magnetoresistance that is sensitive to orbital structure at their ferromagnet–molecule interfaces. The key structural parameters should be controlled in order gain high have not been established, despite importance for efficient manipulation nanoscale. Here, we show single-molecule nickel and benzene molecules can yield a...

With the goal to elucidate nature of spin-dependent electronic transport in ferromagnetic atomic contacts, we present here a combined experimental and theoretical study conductance shot noise metallic contacts made 3d materials Fe, Co, Ni. For comparison, also corresponding results for noble metal Cu. Conductance measurements, performed using low-temperature break junction setup, show that these nanowires: (i) there is no quantization any kind, (ii) dominated by several partially-open...

The simplicity of single-molecule junctions based on direct bonding a small molecule between two metallic electrodes make them an ideal system for the study fundamental questions related to molecular electronics. Here we conductance properties six different molecules suspended Pt electrodes. All show typical about 1G0 which is ascribed dominant role contacts. However, despite metallic-like conductivity, individual signature well-expressed by effect vibrations in inelastic contribution conductance.

The interplay of electrons with a chiral medium has diverse impact across science and technology, influencing drug separation, chemical reactions, electronic transport. In particular, such electronchirality interactions can significantly affect charge spin transport in conductors, ranging from bulk semiconductors down to individual molecules. Consequentially, these are appealing for spintronic manipulations. However, an atomistic mapping the different electron chirality their potential...

We investigate periodical oscillations in the conductance of suspended Au and Pt atomic chains during elongation under mechanical stress. Analysis shot noise measurements reveals that are mainly related to variations a specific conduction channel as chain undergoes transitions between zigzag linear configurations. The calculated local electronic structure shows originate from varying degrees hybridization orbitals along function angle. These highly dependent on directionality symmetry...

The effect of electron–vibration interaction in atomic-scale junctions with a single conduction channel was widely investigated both theoretically and experimentally. However, the more general case several channels has received very little attention. Here we study multichannel molecular junctions, formed by introduction either benzene or carbon dioxide between platinum electrodes. By combining shot noise differential conductance measurements, analyze vibration activation on view distribution...

We report on a quantum form of electronic flicker noise in nanoscale conductors that contains valuable information transport. This is experimentally identified atomic and molecular junctions theoretically analyzed by considering interference due to fluctuating scatterers. Using conductance, shot-noise, flicker-noise measurements, we show the revealed uniquely depends distribution transmission channels, key characteristic conductors. dependence opens door for application as diagnostic probe...

Electronic flicker noise is recognized as the most abundant in electronic conductors, either an unwanted contribution or a source of information on electron transport mechanisms and material properties. This typically observed when voltage difference applied across conductor current flowing through it. Here, we identify unknown type that found temperature nanoscale absence net charge bias. The revealed delta-T demonstrated molecular junctions characterized using quantum theory. expected to...

Single-molecule junctions are versatile test beds for electronic transport at the atomic scale. However, not much is known about early formation steps of such junctions. Here, we study properties premature junction configurations before realization a single-molecule bridge based on vanadocene molecules and silver electrodes. With aid conductance measurements, inelastic electron spectroscopy shot noise analysis, identify in parallel to single-atom examine interplay between these two pathways....