output
19922026
Showing 2015 · cond-mat.mes-hallShow all

31 papers · 2 filters

cond-mat.mes-hall2015★ 5 cited

Lithium doped graphene as spintronic devices

Narjes Kheirabadi

Generating spintronic devices has been a goal for the nano-science. We have used density function theory to determine magnetic phases of single layer and bilayer lithium doped grap…

cond-mat.mes-hall2015★ 15 cited

Probing Bogoliubov quasiparticles in superfluid He with a 'vibrating-wire like' MEMS device

M. Defoort, S. Dufresnes, S. L. Ahlstrom +11

We have measured the interaction between superfluid He-B and a micro-machined goalpost-shaped device at temperatures below . The measured damping follows well the the…

cond-mat.mes-hall2015★ 114 cited

Oligoyne molecular junctions for efficient room temperature thermoelectric power generation

Hatef Sadeghi, Sara Sangtarash, Colin J. Lambert

Understanding phonon transport at a molecular scale is fundamental to the development of high-performance thermoelectric materials for the conversion of waste heat into electricity…

cond-mat.mes-hall2015★ 35 cited

Fast relaxation of photo-excited carriers in 2D transition metal dichalcogenides

Mark Danovich, Igor Aleiner, Neil D. Drummond +1

We predict a fast relaxation of photo-excited carriers in monolayer transition metal dichalcogenides (TMDCs), which is mediated by the emission of longitudinal optical (LO) phonons…

cond-mat.mes-hall2015★ 78 cited

Resonant tunnelling between the chiral Landau states of twisted graphene lattices

M. T. Greenaway, E. E. Vdovin, A. Mishchenko +12

A new class of multilayered functional materials has recently emerged in which the component atomic layers are held together by weak van der Waals forces that preserve the structur…

cond-mat.mes-hall2015★ 29 cited

Thermopower of crown-ether-bridged anthraquinones

A. K. Ismael, I. Grace, C. J. Lambert

We investigate strategies for increasing the thermopower of crown-ether-bridged anthraquinones. The novel design feature of these molecules is the presence of either (1) crown-ethe…

cond-mat.mes-hall2015★ 2 cited

How to extract weak values from a mesoscopic electronic system

Iliya Esin, Alessandro Romito, Yuval Gefen

Weak value (WV) protocols may lead to extreme expectation values that are larger than the corresponding orthodox expectation values. Recent works have proposed to implement this co…

cond-mat.mes-hall2015★ 13 cited

Hexagonal-boron nitride substrates for electroburnt graphene nanojunctions

Hatef Sadeghi, Sara Sangtarash, Colin Lambert

We examine the effect of a hexagonal boron nitride (hBN) substrate on electron transport through graphene nanojunctions just before gap formation. Junctions in vacuum and on hBN ar…

cond-mat.mes-hall2015

Control of thermoelectric properties of phase-coherent molecular wires

Víctor M. García-Suarez, Colin J. Lambert, David Zs. Manrique +1

We demonstrate how redox control of intra-molecular quantum interference in phase-coherent molecular wires can be used to enhance the thermopower (Seebeck coefficient) S and thermo…

cond-mat.mes-hall2015★ 216 cited

A quantum circuit rule for interference effects in single-molecule electrical junctions

David Zsolt Manrique, Cancan Huang, Masoud Baghernejad +9

A quantum circuit rule for combining quantum interference (QI) effects in the conductive properties of oligo(phenyleneethynylene) (OPE)-type molecules possessing three aromatic rin…

cond-mat.mes-hall2015★ 94 cited

Searching the hearts of graphene-like molecules for simplicity, sensitivity and logic

Sara Sangtarash, Cancan Huang, Hatef Sadeghi +7

If quantum interference patterns in the hearts of polycyclic aromatic hydrocarbons (PAHs) could be isolated and manipulated, then a significant step towards realizing the potential…

cond-mat.mes-hall2015★ 111 cited

Magic ratios for connectivity-driven electrical conductance of graphene-like molecules

Yan Geng, Sara Sangtarash, Cancan Huang +7

Experiments using a mechanically-controlled break junction and calculations based on density functional theory demonstrate a new magic ratio rule (MRR),which captures the contribut…

cond-mat.mes-hall2015

Effects of asymmetric contacts on single molecule conductances of HS(CH2)nCOOH in nano-electrical junctions

S. Martin, D. Manrique, V. M. Garcia-Suarez +4

A scanning tunnelling microscope has been used to determine the conductance of single molecular wires with the configuration X-bridge-X, X-bridge-Y and Y-bridge-Y (X = thiol termin…

cond-mat.mes-hall2015

Nanoscale Mapping of Nanosecond Time-scale Electro-Mechanical Phenomena in Graphene NEMS

Nicholas D. Kay, Peter D. Tovee, Benjamin J. Robinson +2

Atomically thin layers of two-dimensional (2D) materials such as graphene, MoS2 and h-BN have immense potential as sensors and electronic devices thanks to their highly desirable e…

cond-mat.mes-hall2015★ 3 cited

Shear Forces and Heat Conductance in Nanoscale Junctions

B. J. Robinson, M. E. Pumarol, O. V. Kolosov

Nanoscale solid-solid contacts define a wealth of material behaviours from the electrical and thermal conductivity in modern electronic devices to friction and losses in micro- and…

cond-mat.mes-hall2015★ 1 cited

Tunable Fermi surface topology and Lifshitz transition in bilayer graphene

Anastasia Varlet, Marcin Mucha-Kruczyński, Dominik Bischoff +6

Bilayer graphene is a highly tunable material: not only can one tune the Fermi energy using standard gates, as in single-layer graphene, but the band structure can also be modified…

cond-mat.mes-hall2015★ 172 cited

Functionalization mediates heat transport in graphene nanoflakes

Haoxue Han, Yong Zhang, Zainelabideen Y. Mijbil +9

Self-heating is a severe problem for high-power microelectronic devices. Graphene and few-layer graphene have attracted tremendous attention for heat removal thanks to their extrao…

cond-mat.mes-hall2015★ 388 cited

Topologically protected defect states in open photonic systems with non-hermitian charge-conjugation and parity-time symmetry

Simon Malzard, Charles Poli, Henning Schomerus

We show that topologically protected defect states can exist in open (leaky or lossy) systems even when these systems are topologically trivial in the closed limit. The states appe…

cond-mat.mes-hall2015★ 17 cited

Influence of impurity spin dynamics on quantum transport in epitaxial graphene

Samuel Lara-Avila, Sergey Kubatkin, Oleksiy Kashuba +6

Experimental evidence from both spin-valve and quantum transport measurements points towards unexpectedly fast spin relaxation in graphene. We report magnetotransport studies of ep…

cond-mat.mes-hall2015★ 238 cited

Quantum Monte Carlo Calculation of the Binding Energy of Bilayer Graphene

E. Mostaani, N. D. Drummond, V. I. Fal'ko

We report diffusion quantum Monte Carlo calculations of the interlayer binding energy of bilayer graphene. We find the binding energies of the AA- and AB-stacked structures at the…

cond-mat.mes-hall2015★ 4 cited

Effect of a tunnel barrier on the scattering from a Majorana bound state in an Andreev billiard

M. Marciani, H. Schomerus, C. W. J. Beenakker

We calculate the joint distribution of the scattering matrix and time-delay matrix of a chaotic quantum dot coupled by point contacts to me…

cond-mat.mes-hall2015★ 53 cited

Nanoelectronic thermometers optimised for sub-10 millikelvin operation

J. R. Prance, D. I. Bradley, R. E. George +8

We report the cooling of electrons in nanoelectronic Coulomb blockade thermometers below 4 mK. Above 7 mK the devices are in good thermal contact with the environment, well isolate…

cond-mat.mes-hall2015★ 16 cited

Identifying single electron charge sensor events using wavelet edge detection

J. R. Prance, B. J. Van Bael, C. B. Simmons +5

The operation of solid-state qubits often relies on single-shot readout using a nanoelectronic charge sensor, and the detection of events in a noisy sensor signal is crucial for hi…

cond-mat.mes-hall2015★ 15 cited

Transport through an impurity tunnel coupled to a Si/SiGe quantum dot

Ryan H. Foote, Daniel R. Ward, J. R. Prance +8

Achieving controllable coupling of dopants in silicon is crucial for operating donor-based qubit devices, but it is difficult because of the small size of donor-bound electron wave…