Tomas Löfwander

Biträdande professor vid Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Visar 33 publikationer

2018

Broken translational symmetry at edges of high-temperature superconductors

Patric Holmvall, Anton Vorontsov, Mikael Fogelström et al
Nature Communications. Vol. 9
Artikel i vetenskaplig tidskrift
2018

Spontaneous generation of fractional vortex-Antivortex pairs at single edges of high-Tc superconductors

Patric Holmvall, Tomas Löfwander, Mikael Fogelström
Journal of Physics: Conference Series. Vol. 969 (1)
Paper i proceeding
2017

Impurity scattering and size quantization effects in a single graphene nanoflake

J. Tesch, P. Leicht, F. Blumenschein et al
Physical Review B. Vol. 95 (7)
Artikel i vetenskaplig tidskrift
2017

Shot noise in a harmonically driven ballistic graphene transistor

Yevgeniy Korniyenko, O. Shevtsov, Tomas Löfwander
Physical Review B. Vol. 95 (16)
Artikel i vetenskaplig tidskrift
2016

Nonlinear response of a ballistic graphene transistor with an ac-driven gate: High harmonic generation and terahertz detection

Yevgeniy Korniyenko, O. Shevtsov, Tomas Löfwander
Physical Review B: covering condensed matter and materials physics. Vol. 94 (12), p. Art no 125445-
Artikel i vetenskaplig tidskrift
2016

Spin-polarized currents and noise in normal-metal/superconductor junctions with Yu-Shiba-Rusinov impurities

Daniel Persson, Oleksii Shevtsov, Tomas Löfwander et al
Physical Review B: covering condensed matter and materials physics. Vol. 94, p. 155424-
Artikel i vetenskaplig tidskrift
2016

Resonant second-harmonic generation in a ballistic graphene transistor with an ac-driven gate

Yevgeniy Korniyenko, Oleksii Shevtsov, Tomas Löfwander
Physical Review B: covering condensed matter and materials physics. Vol. 93 (3)
Artikel i vetenskaplig tidskrift
2016

Hot spot formation in electron-doped PCCO nanobridges

Sophie Charpentier, Riccardo Arpaia, J. Gaudet et al
Physical Review B. Vol. 94 (6)
Artikel i vetenskaplig tidskrift
2015

Spontaneously broken time-reversal symmetry in high-temperature superconductors

Mikael Håkansson, Tomas Löfwander, Mikael Fogelström
Nature Physics. Vol. 11 (9), p. 755-760
Artikel i vetenskaplig tidskrift
2015

Influence of 0001 tilt grain boundaries on the destruction of the quantum Hall effect in graphene

Anders Bergvall, J. M. Carlsson, Tomas Löfwander
Physical Review B - Condensed Matter and Materials Physics. Vol. 91 (24)
Artikel i vetenskaplig tidskrift
2015

Science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems

A. C. Ferrari, F. Bonaccorso, V. Fal'ko et al
Nanoscale. Vol. 7 (11), p. 4598-4810
Artikel i vetenskaplig tidskrift
2015

Spectral properties of superconductors with ferromagnetically ordered magnetic impurities

Daniel Persson, Oleksii Shevtsov, Tomas Löfwander et al
Physical Review B - Condensed Matter and Materials Physics. Vol. 92 (24), p. 245430-
Artikel i vetenskaplig tidskrift
2014

Spin imbalance in hybrid superconducting structures with spin-active interfaces

Oleksii Shevtsov, Tomas Löfwander
Physical Review B - Condensed Matter and Materials Physics. Vol. 90 (8), p. 085432-
Artikel i vetenskaplig tidskrift
2014

Quasiclassical Theory of Spin Imbalance in a Normal Metal-Superconductor Heterostructure with a Spin-Active Interface

Oleksii Shevtsov, Tomas Löfwander
Journal of Physics: Conference Series. Vol. 568 (2), p. 022044-
Paper i proceeding
2013

Andreev spectroscopy of CrO2 thin films on TiO2 and Al2O3

K.A. Yates, M.S. Anwar, J.F.M. Aarts et al
Europhysics Letters. Vol. 103 (6)
Artikel i vetenskaplig tidskrift
2013

Quantum Hall effect in graphene with twisted bilayer stripe defects

Tomas Löfwander, P. San-Jose, E. Prada
Physical Review B - Condensed Matter and Materials Physics. Vol. 87 (20)
Artikel i vetenskaplig tidskrift
2013

Spectral footprints of impurity scattering in graphene nanoribbons

Anders Bergvall, Tomas Löfwander
Physical Review B - Condensed Matter and Materials Physics. Vol. 87 (20)
Artikel i vetenskaplig tidskrift
2013

Inverse proximity effect and influence of disorder on triplet supercurrents in strongly spin-polarized ferromagnets

R. Grein, Tomas Löfwander, M. Eschrig
Physical Review B - Condensed Matter and Materials Physics. Vol. 88 (5)
Artikel i vetenskaplig tidskrift
2011

Graphene nanogap for gate-tunable quantum-coherent single-molecule electronics

Anders Bergvall, Kristian Berland, Per Hyldgaard et al
Physical Review B - Condensed Matter and Materials Physics. Vol. 84 (15)
Artikel i vetenskaplig tidskrift
2010

Is CrO2 Fully Spin Polarized? Analysis of Andreev Spectra and Excess Current

Tomas Löfwander, R. Grein, M. Eschrig
Physical Review Letters. Vol. 105 (20)
Artikel i vetenskaplig tidskrift
2010

Theory of superconductor-ferromagnet point-contact spectra: The case of strong spin polarization

R. Grein, Tomas Löfwander, G. Metalidis et al
Physical Review B - Condensed Matter and Materials Physics. Vol. 81 (9), p. Art. no. 094508-
Artikel i vetenskaplig tidskrift
2008

0-pi Transitions in a Superconductor/Chiral Ferromagnet/Superconductor Junction Induced by a Homogeneous Cycloidal Spiral

Thierry Champel, Tomas Löfwander, Matthias Eschrig
Physical Review Letters. Vol. 100, p. 077003-
Artikel i vetenskaplig tidskrift
2008

Spectrum of Andreev Bound States in a Molecule Embedded Inside a Microwave-Excited Superconducting Junction

Jonas Sköldberg, Tomas Löfwander, Vitaly Shumeiko et al
Physical Review Letters. Vol. 101 (8), p. 087002-
Artikel i vetenskaplig tidskrift
2008

Triplet supercurrents in clean and disordered half-metallic ferromagnets

Matthias Eschrig, Tomas Löfwander
Nature Physics. Vol. 4, p. 138-
Artikel i vetenskaplig tidskrift
2007

Impurity scattering and Mott's formula in graphene

Tomas Löfwander, Mikael Fogelström
Physical Review B - Condensed Matter and Materials Physics. Vol. 76, p. 193401-
Artikel i vetenskaplig tidskrift
2007

Phase diagrams of ferromagnet-superconductor multilayers with misaligned exchange fields

Tomas Löfwander, Thierry Champel, Matthias Eschrig
Physical Review B. Vol. 75, p. 014512-
Artikel i vetenskaplig tidskrift
2006

Low­Temperature Thermal Conductivity of Superconductors With Gap Nodes

Tomas Löfwander, Mikael Fogelström
AIP Conference Proceedings. Vol. 850, p. 569-
Artikel i vetenskaplig tidskrift
2006

Observation of periodic pi-phase shifts in ferromagnet-superconductor multilayers

V Shelukhin, A Tsukernik, M Karpovski et al
Physical Review B. Vol. 73, p. 174506-
Artikel i vetenskaplig tidskrift
2006

Large Thermoelectric Effects and Inelastic Scattering in Unconventional Superconductors

Mikael Fogelström, Tomas Löfwander
AIP Conference Proceedings. Vol. 850, p. 567-
Artikel i vetenskaplig tidskrift
2005

Low-temperature thermal conductivity of superconductors with gap nodes

Tomas Löfwander, Mikael Fogelström
Physical Review Letters. Vol. 95, p. 107006-
Artikel i vetenskaplig tidskrift
2004

Large Thermoelectric Effects in Unconventional Superconductors.

Tomas Löfwander, Mikael Fogelström
Physical Review B. Vol. 70 (2), p. 024515-
Artikel i vetenskaplig tidskrift
2001

Transport Properties of Superconducting d-wave junctions

Tomas Löfwander
Doktorsavhandling
1998

AC Josephson effect in superconducting d-wave junctions

Tomas Löfwander
Licentiatavhandling

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Visar 4 forskningsprojekt

2016–2020

Epitaxiell grafen för metrologi, sensorer och elektronik

Tomas Löfwander Tillämpad kvantfysik
Sergey Kubatkin Kvantkomponentfysik
Mikael Fogelström Mikroteknologi och nanovetenskap (MC2)
Samuel Lara Avila Kvantkomponentfysik
Hans He Kvantkomponentfysik
Stiftelsen för Strategisk forskning (SSF)

2012–2017

The Swedish Graphene Initiative

Mikael Fogelström Tillämpad kvantfysik
Floriana Lombardi Kvantkomponentfysik
Avgust Yurgens Kvantkomponentfysik
Herbert Zirath Mikrovågselektronik
Jan Stake Terahertz- och millimetervågsteknik
Elsebeth Schröder Kvantkomponentfysik
Jari Kinaret Kondenserade materiens teori
Sergey Kubatkin Kvantkomponentfysik
Tomas Löfwander Tillämpad kvantfysik
Eva Olsson Eva Olsson Group
Andreas Isacsson Kondenserade materiens teori
Niklas Rorsman Mikrovågselektronik
Knut och Alice Wallenbergs Stiftelse

2011–2013

Supraledande spinntronik med halv-metalliska ferromagneter

Tomas Löfwander Tillämpad kvantfysik
Vetenskapsrådet (VR)

2010–2013

New Electronics Concept: Wafer-Scale Epitaxial Graphene (ConceptGraphene)

Tomas Löfwander Tillämpad kvantfysik
Europeiska kommissionen (FP7)

16 publikationer finns
Det kan finnas fler projekt där Tomas Löfwander medverkar, men du måste vara inloggad som anställd på Chalmers för att kunna se dem.