103 citations · 800 across the 29 of their papers we have counts for
24 papers · 1 filter
Electronic measurements of entropy in meso- and nanoscale systems
Eugenia Pyurbeeva, Jan A. Mol, Pascal Gehring
Entropy is one of the most fundamental quantities in physics. For systems with few degrees of freedom, the value of entropy provides a powerful insight into its microscopic dynamic…
Phase-Coherent Charge Transport through a Porphyrin Nanoribbon
Zhixin Chen, Jie-Ren Deng, Songjun Hou +9
Quantum interference in nano-electronic devices could lead to reduced-energy computing and efficient thermoelectric energy harvesting. When devices are shrunk down to the molecular…
Mapping Conductance and Switching Behavior of Graphene Devices In Situ
Ondrej Dyck, Jacob L. Swett, Charalambos Evangeli +3
Graphene has been proposed for use in various nanodevice designs, many of which harness emergent quantum properties for device functionality. However, visualization, measurement, a…
Charge-state dependent vibrational relaxation in a single-molecule junction
Xinya Bian, Zhixin Chen, Jakub K. Sowa +8
The interplay between nuclear and electronic degrees of freedom strongly influences molecular charge transport. Herein, we report on transport through a porphyrin dimer molecule, w…
Controlling the entropy of a single-molecule junction
Eugenia Pyurbeeva, Chunwei Hsu, David Vogel +5
Single molecules are nanoscale thermodynamic systems with few degrees of freedom. Thus, the knowledge of their entropy can reveal the presence of microscopic electron transfer dyna…
Electric-field-driven conductance switching in encapsulated graphene nanogaps
E. Pyurbeeva, J. L. Swett, Q. Ye +2
Feedback-controlled electric breakdown of graphene in air or vacuum is a well-established way of fabricating tunnel junctions, nanogaps, and quantum dots. We show that the method i…
Single-electron transport in a molecular Hubbard dimer
James O. Thomas, Jakub K. Sowa, Bart Limburg +9
Many-body electron interactions are at the heart of chemistry and solid-state physics. Understanding these interactions is crucial for the development of molecular-scale quantum an…
A thermodynamic approach to measuring entropy in a few-electron nanodevice
E. Pyurbeeva, J. A. Mol
The entropy of a system gives a powerful insight into its microscopic degrees of freedom, however standard experimental ways of measuring entropy through heat capacity are hard to…
Marcus Theory of Thermoelectricity in Molecular Junctions
Jakub K. Sowa, Jan A. Mol. Erik M. Gauger
Thermoelectric energy conversion is perhaps the most promising of the potential applications of molecular electronics. Ultimately, it is desirable for this technology to operate at…
The role of metallic leads and electronic degeneracies in thermoelectric power generation in quantum dots
Achim Harzheim, Jakub K. sowa, Jacob L. Swett +3
The power factor of a thermoelectric device is a measure of the heat-to-energy conversion efficiency in nanoscopic devices. Yet, even as interest in low-dimensional thermoelectric…
Geometrically Enhanced Thermoelectric Effects in Graphene Nanoconstrictions
Achim Harzheim, Jean Spiece, Charalambos Evangeli +8
The influence of nanostructuring and quantum confinement on the thermoelectric properties of materials has been extensively studied. While this has made possible multiple breakthro…
Beyond Marcus theory and the Landauer-Büttiker approach in molecular junctions: A unified framework
Jakub K. Sowa, Jan A. Mol, G. Andrew D. Briggs +1
Charge transport through molecular junctions is often described either as a purely coherent or a purely classical phenomenon, and described using the Landauer-Büttiker formalism or…
Quantum Interference in Silicon 1D Quasi-Ballistic Junctionless Nanowire Field Effect Transistors
Felix J. Schupp, Muhammad M. Mirza, Donald A. MacLaren +3
We investigate the low temperature transport in 8 nm diameter Si junctionless nanowire field effect transistors fabricated by top down techniques with a wrap-around gate and two di…
Field-Effect Control of Graphene-Fullerene Thermoelectric Nanodevices
Pascal Gehring, Achim Harzheim, Jean Spièce +10
Although it was demonstrated that discrete molecular levels determine the sign and magnitude of the thermoelectric effect in single-molecule junctions, full electrostatic control o…
Environment-Assisted Quantum Transport through Single-Molecule Junctions
Jakub K. Sowa, Jan A. Mol, G. Andrew D. Briggs +1
Single-molecule electronics has been envisioned as the ultimate goal in the miniaturisation of electronic circuits. While the aim of incorporating single-molecule junctions into mo…
A double quantum dot memristor
Ying Li, Gregory W. Holloway, Simon C. Benjamin +3
Memristive systems are generalisations of memristors, which are resistors with memory. In this paper, we present a quantum description of memristive systems. Using this model we pr…
Vibrational effects in charge transport through a molecular double quantum dot
Jakub K. Sowa, Jan A. Mol, G. Andrew D. Briggs +1
Recent progress in the field of molecular electronics has revealed the fundamental importance of the coupling between the electronic degrees of freedom and specific vibrational mod…
Interference-based molecular transistors
Ying Li, Jan Mol, Simon Benjamin +1
Molecular transistors have the potential for switching with lower gate voltages than conventional field-effect transistors. We have calculated the performance of a single-molecule…
Conductance enlargement in pico-scale electro-burnt graphene nanojunctions
Hatef Sadeghi, Jan Mol, Chit Lau +3
Provided the electrical properties of electro-burnt graphene junctions can be understood and controlled, they have the potential to underpin the development of a wide range of futu…
Three-terminal graphene single-electron transistor fabricated using feedback-controlled electroburning
Paweł Puczkarski, Pascal Gehring, Chit S. Lau +5
We report room-temperature Coulomb blockade in a single layer graphene three-terminal single-electron transistor (SET) fabricated using feedback-controlled electroburning. The smal…
Charge-insensitive single-atom spin-orbit qubit in silicon
J. Salfi, J. A. Mol, Dimitrie Culcer +1
High fidelity entanglement of an on-chip array of spin qubits poses many challenges. Spin-orbit coupling (SOC) can ease some of these challenges by enabling long-ranged entanglemen…
Quantum Simulation of the Hubbard Model with Dopant Atoms in Silicon
J. Salfi, J. A. Mol, R. Rahman +4
In quantum simulation, many-body phenomena are probed in controllable quantum systems. Recently, simulation of Bose-Hubbard Hamiltonians using cold atoms revealed previously hidden…
Interface-induced heavy-hole/light-hole splitting of acceptors in silicon
J. A. Mol, J. Salfi, R. Rahman +5
The energy spectrum of spin-orbit coupled states of individual sub-surface boron acceptor dopants in silicon have been investigated using scanning tunneling spectroscopy (STS) at c…
Spatially Resolving Valley Quantum Interference of a Donor in Silicon
J. Salfi, J. A. Mol, R. Rahman +4
Electron and nuclear spins of donor ensembles in isotopically pure silicon experience a vacuum-like environment, giving them extraordinary coherence. However, in contrast to a real…