Hofmann, Phillip

Keywords

Electronic structure
Angle-resolved photoemission spectroscopy
Synchrotron radiation
Ultrafast electron dynamics

Head of Phillips Hofmann's research group

Professor Philip Hofmann

Electronic properties and electron dynamics in quantum materials

Our group is using powerful analytical tools (synchrotron radiation-based photoelectron spectroscopy, time-resolved photoelectron spectroscopy, nano-scale transport measurements and scanning tunnelling microscopy) to study the electronic properties and electron dynamics in quantum materials. We are mostly working with the surfaces of semimetals, topological insulators and with novel two-dimensional materials such as graphene or single-layer transition metal dichalcogenides.

Recent publications

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Benter, S., Bianchi, M., Pan, D., Zhao, J., Xu, H. Q., Timm, R., Hofmann, P. & Mikkelsen, A. (2024). 2D electron gas formation on InAs wurtzite nanosheet surfaces. Applied Physics Letters, 124(15), Article 153104. https://doi.org/10.1063/5.0200217

Beyer, H., Rohde, G., Grubišić Čabo, A., Stange, A., Jacobsen, T., Bignardi, L., Lizzit, D., Lacovig, P., Sanders, C. E., Lizzit, S., Rossnagel, K., Hofmann, P. & Bauer, M. (2019). 80% Valley Polarization of Free Carriers in Singly Oriented Single-Layer WS2 on Au(111). Physical Review Letters, 123(23), Article 236802. https://doi.org/10.1103/PhysRevLett.123.236802

Eich, A., Rollfing, N., Arnold, F., Sanders, C., Ewen, P. R., Bianchi, M., Dendzik, M., Michiardi, M., Mi, J.-L., Bremholm, M., Wegner, D., Hofmann, P. & Khajetoorians, A. A. (2016). Absence of superconductivity in ultrathin layers of FeSe synthesized on a topological insulator. Physical Review B, 94(12), 125437. Article 125437. https://doi.org/10.1103/PhysRevB.94.125437

Hofmann, P., Søndergaard, C. S., Schultz, C., Moreno, S., Gayone, J. P., Vicente Alvarez, M. A., Zampieri, G., Lizzit, S. & Baraldi, A. (2001). Abstract.

Curcio, D., Jones, A., Muzzio, R., Volckaert, K. C. R., Biswas, D., Sanders, C. E., Dudin, P., Cacho, C., Singh, S., Watanabe, K., Taniguchi, T., Miwa, J., Katoch, J., Ulstrup, S. & Hofmann, P. (2020). Accessing the Spectral Function in a Current-Carrying Device. Physical Review Letters, 125(23), Article 236403. https://doi.org/10.1103/PhysRevLett.125.236403

Majchrzak, P., Zhang, Y., Kuibarov, A., Chapman, R., Wyatt, A., Springate, E., Borisenko, S., Büchner, B., Hofmann, P. & Sanders, C. E. (2024). Access to the full three-dimensional Brillouin zone with time resolution, using a new tool for pump-probe angle-resolved photoemission spectroscopy. Review of Scientific Instruments, 95(6), Article 063001. https://doi.org/10.1063/5.0179752

Gammelgaard, L., Bøggild, P., Wells, J., Handrup, K., Hofmann, P., Balslev, M. B., Hansen, J. E. & Petersen, P. R. E. (2008). A complementary metal-oxide-semiconductor compatible monocantilever 12-point probe for conductivity measurements on the nanoscale. Applied Physics Letters, 93, 093104.

Tamtögl, A., Pusterhofer, M., Bremholm, M., Hedegaard, E. M. J., Iversen, B. B., Hofmann, P., Ellis, J., Allison, W., Miret-Artés, S. & Ernst, W. E. (2018). A Helium-Surface Interaction Potential of Bi₂Te₃(111) from Ultrahigh-Resolution Spin-Echo Measurements. Surface Science, 678(12), 25 - 31. https://doi.org/10.1016/j.susc.2018.02.006

More, S., Soares, E., van Hove, M. A., Lizzit, S., Baraldi, A. & Hofmann, P. (2002). alpha-Ga(001) surface phase transition and reconstruction:a LEED analysis of the (1x1) room temperature and c(4x2)low temperature structures. (pp. 046403-1).

Liu, L., Ji, Y., Bianchi, M., Hus, S. M., Li, Z., Balog, R., Miwa, J. A., Hofmann, P., Li, A. P., Zemlyanov, D. Y., Li, Y. & Chen, Y. P. (2024). A metastable pentagonal 2D material synthesized by symmetry-driven epitaxy. Nature Materials, 23(10), 1339-1346. https://doi.org/10.1038/s41563-024-01987-w

Ágústsson, S. Ý., Haque, M. A., Truong, T. T., Bianchi, M., Klyuchnikov, N., Mottin, D., Karras, P. & Hofmann, P. (2025). An autoencoder for compressing angle-resolved photoemission spectroscopy data. Machine Learning: Science and Technology, 6(1), Article 015019. https://doi.org/10.1088/2632-2153/ada8f2

Chien, T. Y., Rienks, E., Jensen, M. F., Hofmann, P. & Plummer, E. W. (2009). Anisotropic electron-phonon coupling on a two-dimensional circular Fermi contour. Physical Review B, 80, 241416. https://doi.org/10.1103/PhysRevB.80.241416

Bignardi, L., Mahatha, S. K., Lizzit, D., Bana, H., Travaglia, E., Lacovig, P., Sanders, C., Baraldi, A., Hofmann, P. & Lizzit, S. (2021). Anisotropic strain in epitaxial single-layer molybdenum disulfide on Ag(110). Nanoscale, 13(44), 18789-18798. https://doi.org/10.1039/d1nr05584d

Kiraly, B., Knol, E. J., Volckaert, K., Biswas, D., Rudenko, A. N., Prishchenko, D. A., Mazurenko, V. G., Katsnelson, M. I., Hofmann, P., Wegner, D. & Khajetoorians, A. A. (2019). Anisotropic Two-Dimensional Screening at the Surface of Black Phosphorus. Physical Review Letters, 123(21), Article 216403. https://doi.org/10.1103/PhysRevLett.123.216403

Perco, D., Pozzo, M., Bianchi, M., Lacovig, P., Sammartino, F., Hofmann, P., Lizzit, S., Alfè, D. & Baraldi, A. (2026). Anisotropy-driven double corrugation: Coexistence of one- and two-dimensional wave patterns in epitaxial graphene on iridium. Carbon, 246, Article 120934. https://doi.org/10.1016/j.carbon.2025.120934

Xian, R. P., Acremann, Y., Agustsson, S. Y., Dendzik, M., Bühlmann, K., Curcio, D., Kutnyakhov, D., Pressacco, F., Heber, M., Dong, S., Demsar, J., Wurth, W., Hofmann, P., Wolf, M., Rettig, L. & Ernstorfer, R. (2019). An open-source, distributed workflow for band mapping data in multidimensional photoemission spectroscopy. ArXiv. https://arxiv.org/abs/1909.07714

Xian, R. P., Acremann, Y., Agustsson, S. Y., Dendzik, M., Bühlmann, K., Curcio, D., Kutnyakhov, D., Pressacco, F., Heber, M., Dong, S., Pincelli, T., Demsar, J., Wurth, W., Hofmann, P., Wolf, M., Scheidgen, M., Rettig, L. & Ernstorfer, R. (2020). An open-source, end-to-end workflow for multidimensional photoemission spectroscopy. Scientific Data, 7(1), Article 442. https://doi.org/10.1038/s41597-020-00769-8

Hoffmann, S. V., Søndergaard, C. S., Schultz, C., Li, Z. & Hofmann, P. (2004). An undulator-based spherical grating monochromator beamline for angle-resolved photoemission spectroscopy. Nucl. Instr. Meth., A 523, 441.

Jones, A. J. H., Majchrzak, P., Volckaert, K., Biswas, D., Vad Andersen, J., Hoffmann, S. V., Jones, N. C., Jiang, Z., Chen, Y. P., Jensen, M. L., Stenshøj, R. Ø., Bianchi, M., Hofmann, P., Ulstrup, S. & Miwa, J. A. (2025). A spatial- and angle-resolved photoemission spectroscopy beamline based on capillary optics at ASTRID2. Review of Scientific Instruments, 96(2), Article 025109. https://doi.org/10.1063/5.0240744

Kühne, F., Neumann, W. J., Hofmann, P., Marques, J., Kaindl, A. M. & Tietze, A. (2021). Assessment of myelination in infants and young children by T1 relaxation time measurements using the magnetization-prepared 2 rapid acquisition gradient echoes sequence. Pediatric Radiology, 51(11), 2058-2068. https://doi.org/10.1007/s00247-021-05109-5

Balog, R., Jørgensen, B., Wells, J., Lægsgaard, E., Hofmann, P., Besenbacher, F. & Hornekær, L. (2009). Atomic hydrogen adsorbate structures on graphene. Journal of the American Chemical Society, 131(25), 8744. https://doi.org/10.1021/ja902714h

Moosburger-Will, J., Klemm, M., Hofmann, P. & Horn, S. (2003). Atomic scale imaging and electronic structure of the MoO2. Paper presented at Fruehjahrstagung der Deutschen Physikalischen Gesellschaft, Dresden, Germany.

More, S., Soares, E., nullHove, V., M.A., Lizzit, S., Baraldi, A. & Hofmann, P. (2002). A two-dimensional metal to semiconductor surface phase transition: a LEED investigation of the Ga(001) surface reconstruction. (pp. 046403-1).

Shivayogimath, A., Thomsen, J. D., Mackenzie, D. M. A., Geisler, M., Stan, R. M., Holt, A. J., Bianchi, M., Crovetto, A., Whelan, P. R., Carvalho, A., Neto, A. H. C., Hofmann, P., Stenger, N., Bøggild, P. & Booth, T. J. (2019). A universal approach for the synthesis of two-dimensional binary compounds. Nature Communications, 10(1), Article 2957. https://doi.org/10.1038/s41467-019-11075-2

Ágústsson, S. Ý., Jones, A. J. H., Curcio, D., Ulstrup, S., Miwa, J., Mottin, D., Karras, P. & Hofmann, P. (2024). Autonomous micro-focus angle-resolved photoemission spectroscopy. Review of Scientific Instruments, 95(5), Article 055106. https://doi.org/10.1063/5.0204663

Lizzit, S., Zampieri, G., Petaccia, L., Larciprete, R., Lacovig, P., Rienks, E. D. L., Bihlmayer, G., Baraldi, A. & Hofmann, P. (2010). Band dispersion in the deep 1s core levelof graphene. Nature Physics, 6(5), 345-349. https://doi.org/10.1038/NPHYS1615

Warmuth, J., Bruix, A., Michiardi, M., Haenke, T., Bianchi, M., Wiebe, J., Wiesendanger, R., Hammer, B., Hofmann, P. & Khajetoorians, A. A. (2016). Band-gap engineering by Bi intercalation of graphene on Ir(111). Physical Review B, 93(16), Article 165437. https://doi.org/10.1103/PhysRevB.93.165437

Balog, R., Jørgensen, B., Nilsson, L., Andersen, M., Rienks, E., Bianchi, M., Fanetti, M., Lægsgaard, E., Baraldi, A., Lizzit, S., Sljivancanin, Z., Besenbacher, F., Hammer, B., Pedersen, T. G., Hofmann, P. & Hornekær, L. (2010). Bandgap opening in graphene induced by patterned hydrogen adsorption. Nature Materials, 9, 315-319. https://doi.org/10.1038/NMAT2710

Goldoni, A., Petaccia, L., Zampieri, G., Lizzit, S., Cepek, C., Gayone, E., Wells, J. & Hofmann, P. (2005). Band-like dispersion in the valence band photoemission spectra of K₆C₆₀ (110) films. Paper presented at XIX International Winterschool/Euroconference on Electronic Properties of Novel Materials, 5. marts 2005, Kirchberg, Tyrol, Østrig.

Silkin, V. M., Pitarke, J. M., Chulkov, E. V., Diaconescu, B., Pohl, K., Vattuone, L., Savio, L., Hofmann, P., Farías, D., Rocca, M. & Echenique, P. M. (2008). Band structure effects on the Be(0001) acoustic surface plasmon energy dispersion. Physica Status Solidi. A: Applications and Materials Science, 1307-1311.

Gronborg, S. S., Thorarinsdottir, K., Kyhl, L., Rodriguez-Fernández, J., Sanders, C. E., Bianchi, M., Hofmann, P., Miwa, J. A., Ulstrup, S. & Lauritsen, J. V. (2019). Basal plane oxygen exchange of epitaxial MoS₂ without edge oxidation. 2D materials, 6(4), Article 045013. https://doi.org/10.1088/2053-1583/ab2d00

Hofmann, P. (2013). Bilayer graphene: A little twist with big consequences. Nature Materials, 12(10), 874-875. https://doi.org/10.1038/nmat3764

Omiciuolo, L., Hernández, E. R., Miniussi, E., Orlando, F., Lacovig, P., Lizzit, S., Menteş, T. O., Locatelli, A., Larciprete, R., Bianchi, M., Ulstrup, S., Hofmann, P., Alfè, D. & Baraldi, A. (2014). Bottom-up approach for the low-cost synthesis of graphene-alumina nanosheet interfaces using bimetallic alloys. Nature Communications, 5, Article 5062. https://doi.org/10.1038/ncomms6062

Michiardi, M., Aguilera, I., Bianchi, M., Eustáquio de Carvalho, V., Orlando Ladeira, L., Gomes Teixeira, N., Avellar Soares, E., Friedrich, C., Blügel, S. & Hofmann, P. (2014). Bulk band structure of Bi2Te3. Physical Review B, 90, Article 075105. https://doi.org/10.1103/PhysRevB.90.075105

Lund, H. E., Volckaert, K., Majchrzak, P., Jones, A. J. H., Bianchi, M., Bremholm, M. & Hofmann, P. (2021). Bulk band structure of Sb₂Te₃ determined by angle-resolved photoemission spectroscopy. Physical Chemistry Chemical Physics, 23(46), 26401-26406. https://doi.org/10.1039/d1cp04031f

Nielsen, M. B., Li, Z., Lizzit, S., Goldoni, A. & Hofmann, P. (2003). Bulk Fermi surface mapping with high-energy angle-resolved photoemission. Journal of Physics: Cond. Matt., 15, 6919-6930.

Lizzit, S., Petaccia, L., Goldoni, A., Larciprete, R., Hofmann, P. & Zampieri, G. (2007). C 1s photoemission spectrum in graphite(0001). Physical Review B, 76, 153408.

Chikina, A., Lund, H., Bianchi, M., Curcio, D., Dalgaard, K. J., Bremholm, M., Lei, S., Singha, R., Schoop, L. M. & Hofmann, P. (2023). Charge density wave generated Fermi surfaces in NdTe3. Physical Review B, 107(16), Article L161103. https://doi.org/10.1103/PhysRevB.107.L161103

Sarkar, S., Bhattacharya, J., Sadhukhan, P., Curcio, D., Dutt, R., Singh, V. K., Bianchi, M., Pariari, A., Roy, S., Mandal, P., Das, T., Hofmann, P., Chakrabarti, A. & Roy Barman, S. (2023). Charge density wave induced nodal lines in LaTe₃. Nature Communications, 14(1), Article 3628. https://doi.org/10.1038/s41467-023-39271-1

Bianchi, M., Hsieh, K., Porat, E. J., Dirnberger, F., Klein, J., Mosina, K., Sofer, Z., Rudenko, A. N., Katsnelson, M. I., Chen, Y. P., Rösner, M. & Hofmann, P. (2023). Charge transfer induced Lifshitz transition and magnetic symmetry breaking in ultrathin CrSBr crystals. Physical Review B, 108(19), Article 195410. https://doi.org/10.1103/PhysRevB.108.195410

Siemann, G. R., Curcio, D., Mortensen, A. S., Sanders, C. E., Zhang, Y., Rigden, J., Majchrzak, P., Biswas, D., Springate, E., Singha, R., Schoop, L. M. & Hofmann, P. (2026). Clustering-enhanced time-and angle-resolved photoemission study of late3: Absence of a photoinduced secondary charge density wave in the electronic structure. Physical Review B, 113(7), 1-11. https://doi.org/10.1103/81XM-BZDY

Bianchi, M., Guan, D., Bao, S., Mi, J., Iversen, B. B., King, P. D. C. & Hofmann, P. (2010). Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi₂Se₃. Nature Communications, 1(8), 128. https://doi.org/10.1038/ncomms1131

Nielsen, L. P., Schønning, M., Christensen, S. V., Hoffmann, S. V., Li, Z., Hofmann, P., Besenbacher, F. & Clausen, B. S. (2001). Combined TPS, XPS, EXAFS and NO-TPD study of the sulfiding of Mo/Al ₂O ₃. Catalysis Letters, 73, 85-90.

Hofmann, P., Zampieri, G., Petaccia, L., Lizzit, S. & Baraldi, A. (2005). Comment on "Momentum-Dependent Energy Losses in Core Level Photoemission Spectra of Poorly Conducting Metals" Physical Review Letters, 94.

Schlenk, T., Bianchi, M., Koleini, M., Eich, A., Pietzsch, O., O. Wehling, T., Frauenheim, T., Balatsky, A., -L. Mi, J., Iversen, B. B., Wiebe, J., A. Khajetoorians, A., Hofmann, P. & Wiesendanger, R. (2013). Controllable magnetic doping of the surface state of a topological insulator. Physical Review Letters, 110(12), 126804. https://doi.org/10.1103/PhysRevLett.110.126804

Balog, R., Andersen, M., Jørgensen, B., Sljivancanin, Z., Hammer, B., Baraldi, A., Larciprete, R., Hofmann, P., Hornekær, L. & Lizzit, S. (2013). Controlling Hydrogenation of Graphene on Ir(111). A C S Nano, 7(5), 3823–3832. https://doi.org/10.1021/nn400780x

Jabed, A., Goto, F., Frimpong, B., Armanno, D., Longa, A., Michiardi, M., Damascelli, A., Hofmann, P., Jargot, G., Ibrahim, H., Légaré, F., Gauthier, N., Beaulieu, S. & Boschini, F. (2026). Control of intervalley scattering in Bi₂Te₃ via temperature-dependent band renormalization. npj Quantum Materials, 11(1), Article 12. https://doi.org/10.1038/s41535-025-00842-8

Tietze, A., Galam, S. & Hofmann, P. (2019). Crediting multi-authored papers to single authors. ArXiv. https://arxiv.org/abs/1905.01943

Tietze, A., Galam, S. & Hofmann, P. (2020). Crediting multi-authored papers to single authors. Physica A: Statistical Mechanics and its Applications, 554, Article 124652. https://doi.org/10.1016/j.physa.2020.124652

Sanders, C. E., Dendzik, M., Ngankeu, A. S., Eich, A., Bruix, A., Bianchi, M., Miwa, J. A., Hammer, B., Khajetoorians, A. A. & Hofmann, P. (2016). Crystalline and electronic structure of single-layer TaS2. Physical Review B, 94(8), Article 081404. https://doi.org/10.1103/PhysRevB.94.081404

Displaying results 1 to 50 out of 254

Revised 08.12.2025

Lise Refstrup Linnebjerg Pedersen