NAPS
Chemin du Cyclotron 2/L7.01.07
1348 Louvain-la-Neuve
Pascal Gehring
Professeur
Chercheur qualifié FNRS
Education
Ph.D. 2014 (Materials Science), École polytechnique fédérale de Lausanne
Dipl.-Ing. 2010 (Materials Science), University of Stuttgart
Past career
Postdoctoral Research Assistant (2019-2020), imec, Belgium
Marie Skłodowska-Curie (IF) Research Fellow (2017-2019), TU Delft, The Netherlands
Senior Research Fellow (2017), University of Oxford, UK
Postdoctoral Research Assistant (2014-2016), University of Oxford, UK
Postdoctoral Research Assistant (2014), Max-Planck Institute for Solid State Research, Germany
- Diploma
Year Label Educational Organization 2014 Docteur en sciences
Scanning thermal microscopy (SThM)
We perform local thermometry and local thermal gating on 2D materials with sub 100nm-lateral resolution using SThM. We want to discover the influence of structural defects, magnetic domain structure or local band-structure variations on the thermoelectric efficiency.
Molecular (Thermo)electrics
We developed device architectures that allow us to measure the electronic and thermoelectric properties of single molecules simultaneously. We use this to reveal how strong correlations, high-spin ground states or molecular vibrations influence thermoelectric response. We thus try to validate theories about what factors impact most crucially the thermoelectric properties, and indicate the synthetic directions to influence the heat to energy conversion in single molecules.
2D-Quantum Materials
We employ (Twisted) 2D materials to engineer designer topological phases or new magnetic structures. To this end we investigate thin films (and heterostructures) of topological materials like topological insulators, Weyl semimetals or Dirac semimetals and 2-dimensional magnets. The goal is to exploit the unique properties of these low-dimensional quantum materials to enable electronic devices with novel functionalities, like next generation spin-caloritronic energy harvesters, electronic components for neuromorphic computing or ultra-fast memory devices.
2024
Canetta, Alessandra ; Volosheniuk, Serhii ; Satheesh, Sayooj ; José Pedro Alvarinhas Batista ; Aloïs Castellano ; Riccardo Conte ; Daniel George Chica ; Kenji Watanabe ; Takashi Taniguchi ; Xavier Roy ; Herre S. J. van der Zant ; Marko Burghard ; Matthieu Jean Verstraete ; Gehring, Pascal. Impact of Spin-Entropy on the Thermoelectric Properties of a 2D Magnet. In: Nano Letters : a journal dedicated to nanoscience and nanotechnology, Vol. 24, no.22, p. 6513-6520 (2024). doi:10.1021/acs.nanolett.4c00809.
2024
Charalambos, Evangeli ; Swett, Jacob ; Spiece, Jean ; Edward McCan ; Jasper Fried ; Achim Harzheim ; Andrew R. Lupini ; G. Andrew D. Briggs ; Gehring, Pascal ; Stephen Jesse ; Oleg V. Kolosov ; Jan E. Mol ; Ondrej Dyck. Thermoelectric Limitations of Graphene Nanodevices at Ultrahigh Current Densities. In: ACS Nano, Vol. 18, no.17, p. 11153-11164 (2024). doi:10.1021/acsnano.3c12930.
2023
Gehring, Pascal ; Merckling, Clement ; Meng, Ruishen. Evidence for intrinsic magnetic scatterers in the topological semimetal $(Bi_2)_5(Bi_2Se_3)_7$. In: APL Materials, Vol. 11, no. 1, p. 111116 (2023). doi:10.1063/5.0167544.
2023
Niu, Wenhui ; Sopp, Simen ; Lodi, Alessandro ; Gee, Alex ; Kong, Fanmiao ; Pei, Tian ; Gehring, Pascal ; Nägele, Jonathan ; Lau, Chit Siong ; Ma, Ji ; Liu, Junzhi ; Narita, Akimitsu ; Mol, Jan ; Burghard, Marko ; Müllen, Klaus ; Mai, Yiyong ; Feng, Xinliang ; Bogani, Lapo. Exceptionally clean single-electron transistors from solutions of molecular graphene nanoribbons. In: Nature Materials, Vol. 22, no.2, p. 180-185 (2023). doi:10.1038/s41563-022-01460-6.
2023
Volosheniuk, Serhii ; Bouwmeester, Damian ; Hsu, Chunwei ; van der Zant, H. S. J. ; Gehring, Pascal. Implementation of SNS thermometers into molecular devices for cryogenic thermoelectric experiments. In: Applied Physics Letters, Vol. 122, no.10, p. 103501 (2023). doi:10.1063/5.0137392.
2023
Canetta, Alessandra ; Gonzalez-Munoz, Sergio ; Nguyen, Viet-Hung ; Agarwal, Khushboo ; de Crombrugghe de Picquendaele, Pauline ; Hong, Yuanzhuo ; Mohapatra, Sambit ; Watanabe, Kenji ; Taniguchi, Takashi ; Nysten, Bernard ; Hackens, Benoît ; Ribeiro-Palau, Rebeca ; Charlier, Jean-Christophe ; Kolosov, Oleg Victor ; Spiece, Jean ; Gehring, Pascal. Quantifying the local mechanical properties of twisted double bilayer graphene. In: Nanoscale, Vol. 15, no. 18, p. 8134-8140 (2023). doi:10.1039/d3nr00388d.
2023
Razeghi, Mohammadali ; Spiece, Jean ; Oğuz, Oğuzhan ; Pehlivanoğlu, Doruk ; Huang, Yubin ; Sheraz, Ali ; Başçı, Uğur ; Dobson, Phillip S. ; Weaver, Jonathan M. R. ; Gehring, Pascal ; Kasırga, T. Serkan. Single-material MoS2 thermoelectric junction enabled by substrate engineering. In: npj 2D Materials and Applications, Vol. 7, no. 1, p. 36 (2023). doi:10.1038/s41699-023-00406-z.
2022
Pyurbeeva, Eugenia ; Mol, Jan A. ; Gehring, Pascal. Electronic measurements of entropy in meso- and nanoscale systems. In: Chemical Physics Reviews, Vol. 3, no.4, p. 041308 (2022). doi:10.1063/5.0101784.
2022
Hsu, Chunwei ; Costi, Theo A. ; Vogel, David ; Wegeberg, Christina ; Mayor, Marcel ; van der Zant, Herre S. J. ; Gehring, Pascal. Magnetic-Field Universality of the Kondo Effect Revealed by Thermocurrent Spectroscopy. In: Physical Review Letters, Vol. 128, no.14, p. 1-16 (2022). doi:10.1103/physrevlett.128.147701.
2021
Gehring, Pascal ; Sowa, Jakub K. ; Hsu, Chunwei ; de Bruijckere, Joeri ; van der Star, Martijn ; Le Roy, Jennifer J. ; Bogani, Lapo ; Gauger, Erik M. ; van der Zant, Herre S. J.. Complete mapping of the thermoelectric properties of a single molecule. In: Nature Nanotechnology, Vol. 16, no.4, p. 426-430 (2021). doi:10.1038/s41565-021-00859-7.
2021
Pyurbeeva, Eugenia ; Hsu, Chunwei ; Vogel, David ; Wegeberg, Christina ; Mayor, Marcel ; van der Zant, Herre ; Mol, Jan A. ; Gehring, Pascal. Controlling the Entropy of a Single-Molecule Junction. In: Nano Letters, Vol. 21, no.22, p. 9715-9719 (2021). doi:10.1021/acs.nanolett.1c03591.
2020
Caneva, Sabina ; Hermans, Matthijs ; Lee, Martin ; García-Fuente, Amador ; Watanabe, Kenji ; Taniguchi, Takashi ; Dekker, Cees ; Ferrer, Jaime ; van der Zant, Herre ; Gehring, Pascal. A Mechanically Tunable Quantum Dot in a Graphene Break Junction. In: Nano Letters : a journal dedicated to nanoscience and nanotechnology, Vol. 20, no.np, p. 4924-4931 (2020). doi:10.1021/acs.nanolett.0c00984.
2020
Harzheim, A. ; Evangeli, C. ; Kolosov, O. ; Gehring, Pascal. Direct mapping of local Seebeck coefficient in 2D material nanostructures via scanning thermal gate microscopy. In: 2D Materials, Vol. 7, no.4, p. 11 p. (2020). doi:10.1088/2053-1583/aba333/meta.
2020
Harzheim, A. ; Koenemann, F. ; Gotsmann, B. ; van der Zant, H.S.J. ; Gehring, Pascal. Single-Material Graphene Thermocouples. In: Advanced Functional Materials, Vol. 30, no.22, p. n-p (2020). doi:10.1002/adfm.202000574.
2020
Harzheim, A. ; Sowa, J.K. ; Swett, J.L. ; Briggs, G.A.D. ; Mol, J.A. ; Gehring, Pascal. The role of metallic leads and electronic degeneracies in thermoelectric power generation in quantum dots. In: Physical review research, Vol. 2, no.4, p. 20 p. (2020). doi:10.1103/PhysRevResearch.2.013140.
2019
Gehring, Pascal ; van der Star, M. ; Evangeli, C. ; Le Roy, J. ; Bogani, L. ; Kolosov, O.V. ; van der Zant, H.S.J.. Efficient heating of single-molecule junctions for thermoelectric studies at cryogenic temperatures. In: Applied Physics Letters, Vol. 115, no.7, p. 5 p. (2019). doi:10.1063/1.5118861.
2019
de Bruijckere, J. ; Gehring, Pascal ; Palacios-Corella, M. ; Clemente-León, M. ; Coronado, E. ; Paaske, J. ; Hedegård, P. ; van der Zant, H.S.J.. Ground-state spin blockade in a single-molecule junction. In: Physical Review Letters, Vol. 122, no.np, p. 5 p. (2019). doi:10.1103/PhysRevLett.122.197701.
2019
Gehring, Pascal ; Thijssen, J.M. ; van der Zant, H.S.J.. Single-molecule quantum-transport phenomena in break junctions. In: Nature Reviews Physics, Vol. 1, no.np, p. 381–396 (2019). doi:10.1038/s42254-019-0055-1.
2019
Papadopoulos, N. ; Gehring, Pascal ; Watanabe, K. ; Taniguchi, T. ; van der Zant, H.S.J. ; Steele, G.A.. Tunneling spectroscopy of localized states of WS2 barriers in vertical van der Waals heterostructures. In: Physical Review B, Condensed Matter, Vol. 101, no.16, p. 6 p. (2019). doi:10.1103/PhysRevB.101.165303.
2018
Harzheim, A. ; Spiece, Jean (co-first author) ; Evangeli, C. ; McCann, E. ; Sheng, Y. ; Warner, J. ; Briggs, A. ; Mol, J. ; Gehring, Pascal. Geometrically Enhanced Thermoelectric Effects in Graphene Nanoconstrictions. In: Nano Letters : a journal dedicated to nanoscience and nanotechnology, Vol. 18, no.np, p. 7719-7725 (2018). doi:10.1021/acs.nanolett.8b03406.
2018
Dubois, V. ; Raja, S.N. ; Gehring, Pascal ; Caneva, S.. Massively parallel fabrication of crack-defined gold break junctions featuring sub-3 nm gaps for molecular devices. In: Nature Communications, Vol. 9, no.np, p. 10 p. (2018). doi:10.1038/s41467-018-05785-2.
2018
Caneva, S. ; Gehring, Pascal ; Garcia-Suarez, V.M. ; Garcia-Fuente, A.. Mechanically controlled quantum interference in graphene break junctions. In: Nature Nanotechnology, Vol. 13, no.np, p. 1126–1131 (2018). doi:10.1038/s41565-018-0258-0.
2017
Gehring, Pascal ; Sowa, J.K. ; Cremers, J.. Distinguishing lead and molecule states in graphene-based single-electron transistors. In: ACS Nano, Vol. 11, no. 6, p. 5325-5331 (2017). doi:10.1021/acsnano.7b00570.
2017
Gehring, Pascal ; Harzheim, Achim ; Spiece, Jean ; Sheng, Yuewen. Field-Effect Control of Graphene-Fullerene Thermoelectric Nanodevices. In: Nano Letters : a journal dedicated to nanoscience and nanotechnology, Vol. 17, no.11, p. 7055-7061 (2017). doi:10.1021/acs.nanolett.7b03736.
2017
Sarwat, G.S. ; Gehring, Pascal ; Rodriguez Hernandez, G.. Scaling limits of graphene nanoelectrodes. In: Nano Letters : a journal dedicated to nanoscience and nanotechnology, Vol. 17, no.6, p. 3688-3693 (2017). doi:10.1021/acs.nanolett.7b00909.
2016
Devender ; Gehring, Pascal ; Gaul, Andrew ; Hoyer, Alexander. Harnessing Topological Band Effects in Bismuth Telluride Selenide for Large Enhancements in Thermoelectric Properties through Isovalent Doping. In: Advanced Materials, Vol. 28, no.30, p. 6436–6441 (2016). doi:10.1002/adma.201601256.
2016
Gehring, Pascal ; Sadeghi, H. ; Sangtarash, S.. Quantum Interference in Graphene Nanoconstrictions. In: Nano Letters : a journal dedicated to nanoscience and nanotechnology, Vol. 16, no.np, p. 4210-4216 (2016). doi:10.1021/acs.nanolett.6b01104.
2016
Gehring, Pascal ; Reusch, F.B. ; Mashhadi, S.S. ; Burghard, M. ; Kern, K.. Surface oxidation effect on the electrical behaviour of Bi_2Te_2Se nanoplatelets. In: Nanotechnology, Vol. 27, no.28, p. 6 p. (2016). doi:10.1088/0957-4484/27/28/285201.
2016
Gehring, Pascal ; Burghard, M.. Ungewöhnliche Phasen im Flächenland. In: Physik in Unserer Zeit, Vol. 47, no.np, p. 272-273 (2016). doi:10.1002/piuz.201690108.
2015
Kern, K. ; Eder, F. ; Meyer, J.C. ; Gehring, Pascal ; Vaklinova, K. ; Hoyer, A. ; Benia, H.M. ; Skakalova, V. ; Argentero, G. ; Burghard, M.. Dimensional crossover in the quantum transport behaviour of the natural topological insulator Aleksite. In: Nature Research Scientific Reports, Vol. 5, p. 1-8 (2015). doi:10.1038/srep11691.
2015
Gehring, Pascal ; Urcuyo, R. ; Duong, D. ; Burghard, M. ; Kern, K.. Thin-layer black phosphorus/GaAs heterojunction p-n diodes. In: Applied Physics Letters, Vol. 106, no.np, p. 5 p. (2015). doi:10.1063/1.4922531.
2015
Puczkarski, P. ; Gehring, Pascal ; Lau, C.S.. Three-terminal graphene single-electron transistor fabricated using feedbackcontrolled electroburning. In: Applied Physics Letters, Vol. 107, no.np, p. 4 p. (2015). doi:10.1063/1.4932133.
2014
Esslinger, M. ; Vogelgesang, R. ; Talebi, N. ; Khunsin, W. ; Gehring, Pascal. Tetradymites as Natural Hyperbolic Materials for the Near-Infrared to Visible. In: ACS Photonics, Vol. 1, no. 12, p. 1285-1289 (2014). doi:10.1021/ph500296e.
2014
Gehring, Pascal ; Burghard, M.. Topologische Isolatoren. In: Physik in Unserer Zeit, Vol. 45, no.np, p. 299-305 (2014). doi:10.1002/ piuz.201401373.
2013
Gehring, Pascal ; Benia, H.M. ; Weng, Y.. A Natural Topological Insulator. In: Nano Letters : a journal dedicated to nanoscience and nanotechnology, Vol. 13, no. np, p. 1179-1184 (2013). doi:10.1021/nl304583m.
2012
Gao, B.F. ; Gehring, Pascal ; Burghard, M. ; Kern, K.. Gate-contolled linear magnetoresistane in thin Bi_2Se_3 sheets. In: Applied Physics Letters, Vol. 100, no.np, p. 4 p. (2012). doi:10.1063/1.4719196.
2012
Gehring, Pascal ; Gao, B.F. ; Burghard, M. ; Kern, K.. Growth of High-Mobility Bi_2Te_2Se Nanoplatelets on hBN Sheets by van der Waals Epitaxy. In: Nano Letters : a journal dedicated to nanoscience and nanotechnology, Vol. 12, no.np, p. 5137-5142 (2012). doi:10.1021/nl3019802.
2012
Gehring, Pascal ; Gao, B.F. ; Burghard, M. ; Kern, K.. Two-dimensional magnetotransport in BI_2Te_2Se nanoplatelets. In: Applied Physics Letters, Vol. 101, no.np, p. 4 p. (2012). doi:10.1063/1.4736404.
2011
Gehring, Pascal ; Weng, Y. ; Wu, Z. ; Strunk, H.P.. Photoluminescence from Al_xIn_{1−x}N layers doped with Tb^{3+} ions. In: Journal of Physics Conference Series, Vol. 281, no.np, p. 7 p. (2010). doi:10.1088/1742-6596/281/1/012014.
2010
Gehring, Pascal ; Weng, Y. ; Wu, Z. ; Strunk, H.P.. Evidence for resonant energy transfer in terbiumdoped (Al,In)N films. In: IOP Conference Series: Materials Science and Engineering, Vol. 15, no.np, p. 7 p. (2010). doi:10.1088/1757-899X/15/1/012007.