Hofmann, Phillip

Philip Hofmann

Professor

M philip@phys.au.dk
H 1520, 323

Keywords

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

Head of Phillips Hofmann's research group

Professor Philip Hofmann

Website

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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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

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).

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

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.

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

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 (Online), 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

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

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. Catal. Lett., 73, 85-90.

Ram, S. K., Desta, D., Rizzoli, R., Bellettato, M., Lyckegaard, F., Jensen, P. B., Jeppesen, B. R., Chevallier, J., Summonte, C., Larsen, A. N. & Balling, P. (2017). Combining light-harvesting with detachability in high-efficiency thin-film silicon solar cells. Nanoscale, 9(21), 7169-7178. https://doi.org/10.1039/c7nr00658f

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

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

Curcio, D., Sanders, C. E., Chikina, A., Lund, H. E., Bianchi, M., Granata, V., Cannavacciuolo, M., Cuono, G., Autieri, C., Forte, F., Avallone, G., Romano, A., Cuoco, M., Dudin, P., Avila, J., Polley, C., Balasubramanian, T., Fittipaldi, R., Vecchione, A. & Hofmann, P. (2023). Current-driven insulator-to-metal transition without Mott breakdown in Ca2RuO4. Physical Review B, 108(16), Article L161105. https://doi.org/10.1103/PhysRevB.108.L161105

Sant, R., Lisi, S., Nguyen, V. D., Mazaleyrat, E., Gómez Herrero, A. C., Geaymond, O., Guisset, V., David, P., Marty, A., Jamet, M., Chapelier, C., Magaud, L., Dappe, Y. J., Bianchi, M., Hofmann, P., Renaud, G. & Coraux, J. (2020). Decoupling Molybdenum Disulfide from Its Substrate by Cesium Intercalation. Journal of Physical Chemistry C, 124(23), 12397-12408. https://doi.org/10.1021/acs.jpcc.0c00970

Barreto, L., Perkins, E., Johannsen, J., Ulstrup, S., Fromm, F., Raidel, C., Seyller, T. & Hofmann, P. (2013). Detecting the local transport properties and the dimensionality of transport of epitaxial graphene by a multi-point probe approach. Applied Physics Letters, 102(3). https://doi.org/10.1063/1.4789508

Gayone, J. E., Kirkegaard, J. E., Wells, J., Hoffmann, S. V., Li, Z. & Hofmann, P. (2005). Determining the electron-phonon mass enhancement parameter λ on metal surfaces. Appl. Phys. A, 80, 943-949.

Petersen, L., Sprunger, P. T., Hofmann, P., Lægsgaard, E., Briner, B. G., Doering, M., Rust, H.-P., Bradshaw, A. M., Besenbacher, F. & Plummer, E. W. (1998). Direct imaging of the 2-D Fermi contour: Fourier transform STM. Phys. Rev. B Rapid Communication, 57, R 6858.

Ram, S. K., Rizzoli, R., Desta, D., Jeppesen, B. R., Bellettato, M., Samatov, I., Tsao, Y.-C., Johannsen, S. R., Neuvonen, P. T., Pedersen, T. G., Pereira, R. N., Pedersen, K., Balling, P. & Larsen, A. N. (2015). Directly patterned TiO₂ nanostructures for efficient light harvesting in thin film solar cells. Journal of Physics D: Applied Physics, 48(36), Article 365101. https://doi.org/10.1088/0022-3727/48/36/365101

Song, F., Wells, J., Handrup, K., Li, Z., Bao, S. N., Schulte, K., Ahola-Tuomi, M., Mayor, L. C., Swarbrick, J. C., Perkins, E., Gammelgaard, L. & Hofmann, P. (2009). Direct measurement of electrical conductance through a self-assembled molecular layer. Nature Nanotechnology, 373-376. https://doi.org/10.1038/NNANO.2009.82

Miwa, J., Hofmann, P., Simmons, M. Y. & Wells, J. (2013). Direct Measurement of the Band Structure of a Buried Two-Dimensional Electron Gas. Physical Review Letters, 110, 136801. https://doi.org/10.1103/PhysRevLett.110.136801

Riley, J. M., Mazzola, F., Dendzik, M., Michiardi, M., Takayama, T., Bawden, L., Granerod, C., Leandersson, M., Balasubramanian, T., Hoesch, M., Kim, T. K., Takagi, H., Meevasana, W., Hofmann, P., Bahramy, M. S., Wells, J. W. & King, P. D. C. (2014). Direct observation of spin-polarized bulk bands in an inversion-symmetric semiconductor. Nature Physics, 10(11), 835-839. https://doi.org/10.1038/NPHYS3105

Displaying results 1 to 50 out of 237

Revised 23.05.2023

Lise Refstrup Linnebjerg Pedersen