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Dr.  Christoph Sürgers

Dr. Christoph Sürgers

Akad. Direktor
AG Wernsdorfer
Tel.+49 721 608-43456
Fax+49 721 608-46103
christoph suergersEaj3∂kit edu


Electronic transport in metallic thin films and nanostructures

We study the electronic transport properties of metallic thin films and nanostructures. Currently we are focussing on the anomalous Hall effect in antiferromagnetic films and single crystals, on the conductance through  rare-earth atomic contacts, and on the spininjection and -manipulation in CMOS-compatible heterostructures.

  • Spininjection and spinmanipulation in CMOS-compatible heterostructures

This is a cooperative project between the Physikalische Institut (PHI) and the Institute of Semiconductortechnology (IHT) at the University of Stuttgart. The goal is the demonstration of spininjection, -detection and –manipulation in CMOS-compatible devices. Carbon-doped Mn5Si3 und Mn5Ge3 compounds with Curie temperatures of 350 K and 450 K, respectively, will be used as ferromagnetic electrodes for spininjection into Ge-  and Si-based semiconductor heterostructures. Samples will be prepared by epitaxial growth in ultra-high vacuum and characterized by electronic transport measurements (Hanle-Effekt), optical measurements, and measurements of the Spin-Seebeck effect. The project is supported by the DFG.

Experimental methods

  • Preparation of thin films and multilayers by electron-beam evaporation in UHV and by magnetron sputtering
  • Mechanically controlled break-junctions
  • In-situ surface characterization
  • x-ray diffraction
  • Scanning tunneling microscopy and spectroscopy
  • Electronic transport measurements (resistivity, Hall effect, electric-field effect) at low temperatures and in magnetic fields
Christoph Sürgers


Publications of the last five years

Creation of equal-spin triplet superconductivity at the Al/EuS interface.
Diesch, S.; Machon, P.; Wolz, M.; Sürgers, C.; Beckmann, D.; Belzig, W.; Scheer, E.
2018. Nature Communications, 9 (1). doi:10.1038/s41467-018-07597-w
Local Joule Heating Mimicking Electroresistance-Like Behavior in Antiperovskite Mn3GaC.
Deng, S.; Fischer, G.; Srichandan, S.; Wang, L.; Wang, C.; Sürgers, C.
2018. Advanced electronic materials, 4 (9), Art.-Nr.:1800028/1-6. doi:10.1002/aelm.201800028
Phase separation and zero thermal expansion in antiperovskite Mn₃Zn0.77Mn0.19N0.94 : An in situ neutron diffraction investigation.
Deng, S.; Sun, Y.; Wu, H.; Shi, Z.; Wang, L.; Yan, J.; Shi, K.; Hu, P.; Diao, X.; Huang, Q.; Sürgers, C.; Wang, C.
2018. Scripta materialia, 146, 18-21. doi:10.1016/j.scriptamat.2017.10.031
Signature of f-electron conductance in α-Cer single-atom contacts.
Kuntz, S.; Berg, O.; Sürgers, C.; Löhneysen, H. von.
2017. Physical review / B, 96, 085120. doi:10.1103/PhysRevB.96.085120
Quasi-metallic behavior of ZnO grown by atomic layer deposition : The role of hydrogen.
Beh, H.; Hiller, D.; Bruns, M.; Welle, A.; Becker, H.-W.; Berghoff, B.; Sürgers, C.; Merz, R.; Zacharias, M.
2017. Journal of applied physics, 122 (2), Art. Nr. 025306. doi:10.1063/1.4994175
Thermoelectric effects in superconductor-ferromagnet tunnel junctions on europium sulfide.
Kolenda, S.; Sürgers, C.; Fischer, G.; Beckmann, D.
2017. Physical review / B, 95 (22), Art. Nr. 224505. doi:10.1103/PhysRevB.95.224505
15 cm-1 to 12 000 cm-1 spectral coverage without changing optics: Diamond beam splitter adaptation of an FTIR spectrometer.
Strelnikov, D.; Kern, B.; Sürgers, C.; Kappes, M. M.
2017. Review of scientific instruments, 88 (2), 023118. doi:10.1063/1.4976744
Switching of a large anomalous Hall effect between metamagnetic phases of a non-collinear antiferromagnet.
Sürgers, C.; Wolf, T.; Adelmann, P.; Kittler, W.; Fischer, G.; Löhneysen, H. von.
2017. Scientific reports, 7, Art.Nr.: 42982. doi:10.1038/srep42982
Two-band superconductivity of bulk and surface states in Ag thin films on Nb.
Tomanic, T.; Schackert, M.; Wulfhekel, W.; Sürgers, C.; Löhneysen, H. v.
2016. Physical review / B, 94 (22), Art.Nr.: 220503. doi:10.1103/PhysRevB.94.220503
Controlled electromigration and oxidation of free-standing copper wires.
Hauser, J. S.; Schwichtenberg, J.; Marz, M.; Sürgers, C.; Seiler, A.; Gerhards, U.; Messerschmidt, F.; Hensel, A.; Dittmeyer, R.; Löhneysen, H. v.; Hoffmann-Vogel, R.
2016. Applied physics / A, 122, 1068. doi:10.1007/s00339-016-0600-z
Magnetostrictive Fe_73Ga_27 nanocontacts for low-field conductance switching.
Kannan, U. M.; Kuntz, S.; Berg, O.; Kittler, W.; Basumatary, H.; Chelvane, J. A.; Sürgers, C.; Jammalamadaka, S. N.
2016. Applied physics letters, 108, Art. Nr. 242408. doi:10.1063/1.4953873
Second-Harmonic Generation from ZnO/Al2O3 Nanolaminate Optical Metamaterials Grown by Atomic-Layer Deposition.
Wickberg, A.; Kieninger, C.; Sürgers, C.; Schlabach, S.; Mu, X.; Koos, C.; Wegener, M.
2016. Advanced optical materials, 4 (8), 1203-1208. doi:10.1002/adom.201600200
Anomalous Hall effect in the noncollinear antiferromagnet Mn5Si3.
Sürgers, C.; Kittler, W.; Wolf, T.; Löhneysen, H. von.
2016. AIP Advances, 6 (5), Art. Nr.: 055604. doi:10.1063/1.4943759
Remote control of magnetostriction-based nanocontacts at room temperature.
Jammalamadaka, S. N.; Kuntz, S.; Berg, O.; Kittler, W.; Kannan, U. M.; Chelvane, J. A.; Sürgers, C.
2015. Scientific Reports, 5, 13621. doi:10.1038/srep13621
Large topological Hall effect in the non-collinear phase of an antiferromagnet.
Sürgers, C.; Fischer, G.; Winkel, P.; Löhneysen, H. von.
2014. Nature Communications, 5, Art.Nr. 3400. doi:10.1038/ncomms4400
Fabrication and magnetic characterization of nanometer-sized ellipses of the ferromagnetic insulator EuS.
Wolf, M. J.; Sürgers, C.; Fischer, G.; Scherer, T.; Beckmann, D.
2014. Journal of magnetism and magnetic materials, 368 (November), 49-53. doi:10.1016/j.jmmm.2014.04.067
Magnetotransport in ferromagnetic Mn₅Ge₃, Mn₅Ge₃C₀̣₈ and Mn₅Si₃C₀̣₈ thin films.
Sürgers, C.; Fischer, G.; Winkel, P.; Löhneysen, H. von.
2014. Physical review / B, 90 (10), Art.Nr. 104421. doi:10.1103/PhysRevB.90.104421
Spin-polarized quasiparticle transport in exchange-split superconducting aluminum on europium sulfide.
Wolf, M. J.; Sürgers, C.; Fischer, G.; Beckmann, D.
2014. Physical review / B, 90 (14), Art.Nr. 144509. doi:10.1103/PhysRevB.90.144509
Hanle-effect measurements of spin injection from Mn5Ge3C0.8/Al2O3-contacts into degenerately doped Ge channels on Si.
Fischer, I. A.; Chang, L.-T.; Sürgers, C.; Rolseth, E.; Reiter, S.; Stefanov, S.; Chiussi, S.; Tang, J.; Wang, K. L.; Schulze, J.
2014. Applied Physics Letters, 105 (22), Article Nr. 222408. doi:10.1063/1.4903233
Temperature-dependent scanning tunneling spectroscopy on the Si(557)-Au surface.
Sauter, M.; Hoffmann, R.; Sürgers, C.; Löhneysen, H. von.
2014. Physical review / B, 89 (7), Art.Nr. 075406. doi:10.1103/PhysRevB.89.075406