322 citations · 692 across the 9 of their papers we have counts for
9 papers
Revealing contributions to conduction from transport within ordered and disordered regions in highly doped conjugated polymers through analysis of temperature-dependent Hall measurements
William A. Wood, Ian E. Jacobs, Leszek J. Spalek +4
Hall effect measurements in doped polymer semiconductors are widely reported, but are difficult to interpret due to screening of Hall voltages by carriers undergoing incoherent tra…
The effect of the dielectric end groups on the positive bias stress stability of N2200 organic field effect transistors
D. Simatos, L. J. Spalek, U. Kraft +5
Bias stress degradation in conjugated polymer field-effect transistors is a fundamental problem in these disordered materials and can be traced back to interactions of the material…
Structural and dynamic disorder, not ionic trapping, controls charge transport in highly doped conducting polymers
Ian E. Jacobs, Gabriele D'Avino, Vincent Lemaur +18
Doped organic semiconductors are critical to emerging device applications, including thermoelectrics, bioelectronics, and neuromorphic computing devices. It is commonly assumed tha…
Fragment Graphical Variational AutoEncoding for Screening Molecules with Small Data
John Armitage, Leszek J. Spalek, Malgorzata Nguyen +11
In the majority of molecular optimization tasks, predictive machine learning (ML) models are limited due to the unavailability and cost of generating big experimental datasets on t…
Magnetoelastic relaxations in EuTiO3
J. Schiemer, L. J. Spalek, S. S. Saxena +3
The multiferroic properties of EuTiO3 are greatly enhanced when a sample is strained, signifying that coupling between strain and structural, magnetic or ferroelectric order parame…
Intrinsic Structural Disorder and the Magnetic Ground State in Bulk EuTiO3
A. P. Petrovic, Y. Kato, S. S. Sunku +8
The magnetic properties of single-crystal EuTiO3 are suggestive of nanoscale disorder below its cubic-tetragonal phase transition. We demonstrate that electric field cooling acts t…
On the role of intrinsic disorder in the structural phase transition of magnetoelectric EuTiO3
Mattia Allieta, Marco Scavini, Leszek Spalek +6
Up to now the crystallographic structure of the magnetoelectric perovskite EuTiO3 was considered to remain cubic down to low temperature. Here we present high resolution synchrotro…
Quantum criticality in ferroelectrics
S. E. Rowley, L. J. Spalek, R. P. Smith +4
Materials tuned to the neighbourhood of a zero temperature phase transition often show the emergence of novel quantum phenomena. Much of the effort to study these new effects, like…
Verwey transition in FeO at high pressure: quantum critical behavior at the onset of metallization
J. Spałek, A. Kozłowski, Z. Tarnawski +5
We provide evidence for the existence of a {\em quantum critical point} at the metallization of magnetite FeO at an applied pressure of GPa. We show t…