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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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

Warmuth, J., Bremholm, M., Hofmann, P., Wiebe, J. & Wiesendanger, R. (2018). Domain imaging across the magneto-structural phase transitions in Fe_1+y Te. npj Quantum Materials, 3(1), Article 21. https://doi.org/10.1038/s41535-018-0096-1

Arnold, F., Warmuth, J., Michiardi, M., Fikacek, J., Bianchi, M., Hu, J., Mao, Z., Miwa, J., Singh, U. R., Bremholm, M., Wiesendanger, R., Honolka, J., Wehling, T., Wiebe, J. & Hofmann, P. (2018). Electronic structure of Fe_1.08Te bulk crystals and epitaxial FeTe thin films on Bi₂Te₃. Journal of Physics: Condensed Matter, 30(6), Article 065502. https://doi.org/10.1088/1361-648X/aaa43e

Singh, U. R., Warmuth, J., Kamlapure, A., Cornils, L., Bremholm, M., Hofmann, P., Wiebe, J. & Wiesendanger, R. (2018). Enhanced spin-ordering temperature in ultrathin FeTe films grown on a topological insulator. Physical Review B, 97(14), Article 144513. https://doi.org/10.1103/PhysRevB.97.144513

Bana, H., Travaglia, E., Bignardi, L., Lacovig, P., Sanders, C. E., Dendzik, M., Michiardi, M., Bianchi, M., Lizzit, D., Presel, F., De Angelis, D., Apostol, N., Das, P. K., Fujii, J., Vobornik, I., Larciprete, R., Baraldi, A., Hofmann, P. & Lizzit, S. (2018). Epitaxial growth of single-orientation high-quality MoS2 monolayers. 2D materials, 5(3), Article 035012. https://doi.org/10.1088/2053-1583/aabb74

Kyhl, L., Bisson, R., Balog, R., Groves, M. N., Kolsbjerg, E. L., Cassidy, A. M., Jørgensen, J. H., Halkjær, S., Miwa, J. A., Čabo, A. G., Angot, T., Hofmann, P., Arman, M. A., Urpelainen, S., Lacovig, P., Bignardi, L., Bluhm, H., Knudsen, J., Hammer, B. & Hornekaer, L. (2018). Exciting H2 Molecules for Graphene Functionalization. ACS Nano, 12(1), 513-520. https://doi.org/10.1021/acsnano.7b07079

Polley, C. M., Buczko, R., Forsman, A., Dziawa, P., Szczerbakow, A., Rechcinski, R., Kowalski, B. J., Story, T., Trzyna, M., Bianchi, M., Cabo, A. G., Hofmann, P., Tjernberg, O. & Balasubramanian, T. (2018). Fragility of the Dirac Cone Splitting in Topological Crystalline Insulator Heterostructures. A C S Nano, 12(1), 617-626. https://doi.org/10.1021/acsnano.7b07502

Tamtoegl, A., Campi, D., Bremholm, M., Hedegaard, E. M. J., Iversen, B. B., Bianchi, M., Hofmann, P., Marzari, N., Benedek, G., Ellis, J. & Allison, W. (2018). Nanoscale surface dynamics of Bi2Te3(111): observation of a prominent surface acoustic wave and the role of van der Waals interactions. Nanoscale, 10(30), 14627-14636. https://doi.org/10.1039/c8nr03102a

Arnold, F., Stan, R.-M., Mahatha, S. K., Lund, H. E., Curcio, D., Dendzik, M., Bana, H., Travaglia, E., Bignardi, L., Lacovig, P., Lizzit, D., Li, Z., Bianchi, M., Miwa, J. A., Bremholm, M., Lizzit, S., Hofmann, P. & Sanders, C. E. (2018). Novel single-layer vanadium sulphide phases. 2D materials, 5(4), Article 045009. https://doi.org/10.1088/2053-1583/aad0c8

Ulstrup, S., Lacovig, P., Orlando, F., Lizzit, D., Bignardi, L., Dalmiglio, M., Bianchi, M., Mazzola, F., Baraldi, A., Larciprete, R., Hofmann, P. & Lizzit, S. (2018). Photoemission investigation of oxygen intercalated epitaxial graphene on Ru(0001). Surface Science, 678, 57-64. https://doi.org/10.1016/j.susc.2018.03.017

Mahatha, S. K., Dendzik, M., Sanders, C. E., Michiardi, M., Bianchi, M., Miwa, J. A. & Hofmann, P. (2018). Quasi-free-standing single-layer WS2 achieved by intercalation. Physical Review Materials, 2(12), Article 124001. https://doi.org/10.1103/PhysRevMaterials.2.124001

Mazzola, F., Wells, J. W., Pakpour-Tabrizi, A. C., Jackman, R. B., Thiagarajan, B., Hofmann, P. & Miwa, J. A. (2018). Simultaneous Conduction and Valence Band Quantization in Ultrashallow High-Density Doping Profiles in Semiconductors. Physical Review Letters, 120(4), Article 046403. https://doi.org/10.1103/PhysRevLett.120.046403

Eickholt, P., Sanders, C., Dendzik, M., Bignardi, L., Lizzit, D., Lizzit, S., Bruix, A., Hofmann, P. & Donath, M. (2018). Spin Structure of K Valleys in Single-Layer WS2 on Au(111). Physical Review Letters, 121(13), Article 136402. https://doi.org/10.1103/PhysRevLett.121.136402

Munkholm Kevy, S., Bremholm, M., Wollesen, L., Lund, H. E. & Hofmann, P. (2018). Structure-Property investigation of superconductivity in Nb-doped Bi2Se3. Poster session presented at DPG Spring Meeting of the Condensed Matter Section (SKM) together with the EPS (2018), Berlin, Germany.

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

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

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

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

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

Tietze, M., Schaumann, A., Thomale, U., Hofmann, P. & Tietze, A. (2019). Dynamic cerebellar herniation in Chiari patients during the cardiac cycle evaluated by dynamic magnetic resonance imaging. Neuroradiology, 61(7), 825-832. https://doi.org/10.1007/s00234-019-02203-2

Mahatha, S. K., Ngankeu, A. S., Hinsche, N. F., Mertig, I., Guilloy, K., Matzen, P. L., Bianchi, M., Sanders, C. E., Miwa, J. A., Bana, H., Travaglia, E., Lacovig, P., Bignardi, L., Lizzit, D., Larciprete, R., Baraldi, A., Lizzit, S. & Hofmann, P. (2019). Electron-phonon coupling in single-layer MoS2. Surface Science, 681, 64-69. https://doi.org/10.1016/j.susc.2018.11.012

Stan, R. M., Mahatha, S. K., Bianchi, M., Sanders, C. E., Curcio, D., Hofmann, P. & Miwa, J. A. (2019). Epitaxial single-layer NbS2 on Au(111): Synthesis, structure, and electronic properties. Physical Review Materials, 3(4), Article 044003. https://doi.org/10.1103/PhysRevMaterials.3.044003

Bignardi, L., Lizzit, D., Bana, H., Travaglia, E., Lacovig, P., Sanders, C. E., Dendzik, M., Michiardi, M., Bianchi, M., Ewert, M., Buß, L., Falta, J., Flege, J. I., Baraldi, A., Larciprete, R., Hofmann, P. & Lizzit, S. (2019). Growth and structure of singly oriented single-layer tungsten disulfide on Au(111). Physical Review Materials, 3(1), Article 014003. https://doi.org/10.1103/PhysRevMaterials.3.014003

Tkáč, V., Výborný, K., Komanický, V., Warmuth, J., Michiardi, M., Ngankeu, A. S., Vondráček, M., Tarasenko, R., Vališka, M., Stetsovych, V., Carva, K., Garate, I., Bianchi, M., Wiebe, J., Holý, V., Hofmann, P., Springholz, G., Sechovský, V. & Honolka, J. (2019). Influence of an Anomalous Temperature Dependence of the Phase Coherence Length on the Conductivity of Magnetic Topological Insulators. Physical Review Letters, 123(3), Article 036406. https://doi.org/10.1103/PhysRevLett.123.036406

Rostami, H., Volckaert, K., Lanata, N., Mahatha, S. K., Sanders, C. E., Bianchi, M., Lizzit, D., Bignardi, L., Lizzit, S., Miwa, J. A., Balatsky, A., Hofmann, P. & Ulstrup, S. (2019). Layer and orbital interference effects in photoemission from transition metal dichalcogenides. Physical Review B, 100(23), Article 235423. https://doi.org/10.1103/PhysRevB.100.235423

Volckaert, K., Rostami, H., Biswas, D., Markovic, I., Andreatta, F., Sanders, C. E., Majchrzak, P., Cacho, C., Chapman, R. T., Wyatt, A., Springate, E., Lizzit, D., Bignardi, L., Lizzit, S., Mahatha, S. K., Bianchi, M., Lanata, N., King, P. D. C., Miwa, J. A. ... Ulstrup, S. (2019). Momentum-resolved linear dichroism in bilayer MoS₂. Physical Review B, 100(24), Article 241406. https://doi.org/10.1103/PhysRevB.100.241406

Ulstrup, S., Giusca, C. E., Miwa, J. A., Sanders, C. E., Browning, A., Dudin, P., Cacho, C., Kazakova, O., Gaskill, D. K., Myers-Ward, R. L., Zhang, T., Terrones, M. & Hofmann, P. (2019). Nanoscale mapping of quasiparticle band alignment. Nature Communications, 10(1), Article 3283. https://doi.org/10.1038/s41467-019-11253-2

Shao, B., Eich, A., Sanders, C., Ngankeu, A. S., Bianchi, M., Hofmann, P., Khajetoorians, A. A. & Wehling, T. O. (2019). Pseudodoping of a metallic two-dimensional material by the supporting substrate. Nature Communications, 10(1), Article 180. https://doi.org/10.1038/s41467-018-08088-8

Hofmann, P., Ugeda, M. M., Tamtögl, A., Ruckhofer, A., Ernst, W. E., Benedek, G., Martínez-Galera, A. J., Stróżecka, A., Gómez-Rodríguez, J. M., Rienks, E., Jensen, M. F., Pascual, J. I. & Wells, J. W. (2019). Strong-coupling charge density wave in a one-dimensional topological metal. Physical Review B, 99(3), Article 035438. https://doi.org/10.1103/PhysRevB.99.035438

Tietze, A. & Hofmann, P. (2019). The h-index and multi-author h _m -index for individual researchers in condensed matter physics. Scientometrics, 119(1), 171-185. https://doi.org/10.1007/s11192-019-03051-w

Schenk, A. K., Pakpour-Tabrizi, A. C., Holt, A. J. U., Mahatha, S. K., Arnold, F., Bianchi, M., Jackman, R. B., Miwa, J. A., Hofmann, P., Cooil, S. P., Wells, J. W. & Mazzola, F. (2019). The occupied electronic structure of ultrathin boron doped diamond. ArXiv. https://arxiv.org/abs/1907.00673

Mazzola, F., Chen, C.-Y., Rahman, R., Zhu, X.-G., Polley, C. M., Balasubramanian, T., King, P. D. C., Hofmann, P., Miwa, J. A. & Wells, J. W. (2019). The Sub-band Structure of Atomically Sharp Dopant Profiles in Silicon. ArXiv. https://arxiv.org/abs/1904.10929

Ruckhofer, A., Campi, D., Bremholm, M., Hofmann, P., Bendek, G., Bernasconi, M., Ernst, W. E. & Tamtögl, A. (2019). THz Surface Modes and Electron-Phonon Coupling in Bi₂Se₃(111). ArXiv. https://arxiv.org/abs/1907.01864

Andreatta, F., Rostami, H., Čabo, A. G., Bianchi, M., Sanders, C. E., Biswas, D., Cacho, C., Jones, A. J. H., Chapman, R. T., Springate, E., King, P. D. C., Miwa, J. A., Balatsky, A., Ulstrup, S. & Hofmann, P. (2019). Transient hot electron dynamics in single-layer TaS₂. Physical Review B, 99(16), Article 165421. https://doi.org/10.1103/PhysRevB.99.165421

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

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

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

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

Balatsky, A. V., Haraldsen, J. T., Black-Schaffer, A. M., Pertsova, A. & Hofmann, P. (2020). Dynamic quantum matter. Annalen der Physik, 532(2), Article 2000037. https://doi.org/10.1002/andp.202000037

Muzzio, R., Jones, A. J. H., Curcio, D., Biswas, D., Miwa, J. A., Hofmann, P., Watanabe, K., Taniguchi, T., Singh, S., Jozwiak, C., Rotenberg, E., Bostwick, A., Koch, R. J., Ulstrup, S. & Katoch, J. (2020). Momentum-resolved view of highly tunable many-body effects in a graphene/hBN field-effect device. Physical Review B, 101(20), Article 201409. https://doi.org/10.1103/PhysRevB.101.201409

Tamtögl, A., Sacchi, M., Avidor, N., Calvo-Almazán, I., Townsend, P. S. M., Bremholm, M., Hofmann, P., Ellis, J. & Allison, W. (2020). Nanoscopic diffusion of water on a topological insulator. Nature Communications, 11(1), Article 278. https://doi.org/10.1038/s41467-019-14064-7

Holt, A. J., Mahatha, S. K., Stan, R. M., Strand, F. S., Nyborg, T., Curcio, D., Schenk, A. K., Cooil, S. P., Bianchi, M., Wells, J. W., Hofmann, P. & Miwa, J. A. (2020). Observation and origin of the Δ manifold in Si:P δ layers. Physical Review B, 101(12), Article 121402. https://doi.org/10.1103/PhysRevB.101.121402

Dendzik, M., Xian, R. P., Perfetto, E., Sangalli, D., Kutnyakhov, D., Dong, S., Beaulieu, S., Pincelli, T., Pressacco, F., Curcio, D., Agustsson, S. Y., Heber, M., Hauer, J., Wurth, W., Brenner, G., Acremann, Y., Hofmann, P., Wolf, M., Marini, A. ... Ernstorfer, R. (2020). Observation of an Excitonic Mott Transition through Ultrafast Core-cum-Conduction Photoemission Spectroscopy. Physical Review Letters, 125(9), Article 096401. https://doi.org/10.1103/PhysRevLett.125.096401

Jones, A. J. H., Muzzio, R., Majchrzak, P., Pakdel, S., Curcio, D., Volckaert, K., Biswas, D., Gobbo, J., Singh, S., Robinson, J. T., Watanabe, K., Taniguchi, T., Kim, T. K., Cacho, C., Lanata, N., Miwa, J. A., Hofmann, P., Katoch, J. & Ulstrup, S. (2020). Observation of Electrically Tunable van Hove Singularities in Twisted Bilayer Graphene from NanoARPES. Advanced Materials, 32(31), Article 2001656. https://doi.org/10.1002/adma.202001656

Ruckhofer, A., Campi, D., Bremholm, M., Hofmann, P., Benedek, G., Bernasconi, M., Ernst, W. E. & Tamtögl, A. (2020). Terahertz surface modes and electron-phonon coupling on Bi₂Se₃(111). Physical Review Research , 2(2), Article 023186. https://doi.org/10.1103/PhysRevResearch.2.023186

Pakpour-Tabrizi, A. C., Schenk, A. K., Holt, A. J. U., Mahatha, S. K., Arnold, F., Bianchi, M., Jackman, R. B., Butler, J. E., Vikharev, A., Miwa, J. A., Hofmann, P., Cooil, S. P., Wells, J. W. & Mazzola, F. (2020). The occupied electronic structure of ultrathin boron doped diamond. Nanoscale Advances, 2(3), 1358-1364. https://doi.org/10.1039/c9na00593e

Mazzola, F., Chen, C. Y., Rahman, R., Zhu, X. G., Polley, C. M., Balasubramanian, T., King, P. D. C., Hofmann, P., Miwa, J. A. & Wells, J. W. (2020). The sub-band structure of atomically sharp dopant profiles in silicon. npj Quantum Materials, 5(1), Article 34. https://doi.org/10.1038/s41535-020-0237-1

Kutnyakhov, D., Xian, R. P., Dendzik, M., Heber, M., Pressacco, F., Agustsson, S. Y., Wenthaus, L., Meyer, H., Gieschen, S., Mercurio, G., Benz, A., Bühlman, K., Däster, S., Gort, R., Curcio, D., Volckaert, K., Bianchi, M., Sanders, C., Miwa, J. A. ... Wurth, W. (2020). Time- And momentum-resolved photoemission studies using time-of-flight momentum microscopy at a free-electron laser. Review of Scientific Instruments, 91(1), Article 013109. https://doi.org/10.1063/1.5118777

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

Displaying results 151 to 200 out of 250

Revised 08.12.2025

Lise Refstrup Linnebjerg Pedersen