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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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

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

Fikáček, J., Warmuth, J., Arnold, F., Piamonteze, C., Mao, Z., Holý, V., Hofmann, P., Bremholm, M., Wiebe, J., Wiesendanger, R. & Honolka, J. (2021). Disorder-induced time effect in the antiferromagnetic domain state of Fe₁₊_yTe. Journal of Magnetism and Magnetic Materials, 540, Article 168426. https://doi.org/10.1016/j.jmmm.2021.168426

Hofmann, P. & King, P. D. C. (2021). Editorial: ARPES studies of topological materials. Electronic Structure, 3(2), Article 020201. https://doi.org/10.1088/2516-1075/abf1cb

Holt, A. J. U., Pakdel, S., Rodriguez-Fernandez, J., Zhang, Y. X., Curcio, D., Sun, Z., Lacovig, P., Yao, Y.-X., Lauritsen, J., Lizzit, S., Lanata, N., Hofmann, P., Bianchi, M. & Sanders, C. E. (2021). Electronic properties of single-layer CoO2/Au(111). 2D materials, 8(3), Article 035050. https://doi.org/10.1088/2053-1583/ac040f

Ruckhofer, A., Halbritter, S., Lund, H. E., Holt, A. J. U., Bianchi, M., Bremholm, M., Benedek, G., Hofmann, P., Ernst, W. E. & Tamtögl, A. (2021). Inelastic helium atom scattering from Sb₂Te₃(111): phonon dispersion, focusing effects and surfing. Physical Chemistry Chemical Physics, 23(13), 7806-7813. https://doi.org/10.1039/d0cp04738d

Majchrzak, P., Muzzio, R., Jones, A. J. H., Curcio, D., Volckaert, K., Biswas, D., Gobbo, J., Singh, S., Robinson, J. T., Watanabe, K., Taniguchi, T., Kim, T. K., Cacho, C., Miwa, J. A., Hofmann, P., Katoch, J. & Ulstrup, S. (2021). In Operando Angle-Resolved Photoemission Spectroscopy with Nanoscale Spatial Resolution: Spatial Mapping of the Electronic Structure of Twisted Bilayer Graphene. Small Science, 1(6), 2000075. Article 2000075. https://doi.org/10.1002/smsc.202000075

Kamber, U., Pakdel, S., Stan, R.-M., Kamlapure, A., Kiraly, B., Arnold, F., Eich, A., Ngankeu, A. S., Bianchi, M., Miwa, J., Sanders, C., Lanata, N., Hofmann, P. & Khajetoorians, A. A. (2021). Moiré-induced electronic structure modifications in monolayer V₂ S₃ on Au(111). Physical Review B, 103(11), Article 115414. https://doi.org/10.1103/PhysRevB.103.115414

Dreher, P., Wan, W., Chikina, A., Bianchi, M., Guo, H., Harsh, R., Mañas-Valero, S., Coronado, E., Martínez-Galera, A. J., Hofmann, P., Miwa, J. A. & Ugeda, M. M. (2021). Proximity Effects on the Charge Density Wave Order and Superconductivity in Single-Layer NbSe₂. ACS Nano, 15(12), 19430-19438. https://doi.org/10.1021/acsnano.1c06012

Majchrzak, P., Volckaert, K., Čabo, A. G., Biswas, D., Bianchi, M., Mahatha, S. K., Dendzik, M., Andreatta, F., Grønborg, S. S., Marković, I., Riley, J. M., Johannsen, J. C., Lizzit, D., Bignardi, L., Lizzit, S., Cacho, C., Alexander, O., Matselyukh, D., Wyatt, A. S. ... Ulstrup, S. (2021). Spectroscopic view of ultrafast charge carrier dynamics in single- and bilayer transition metal dichalcogenide semiconductors. Journal of Electron Spectroscopy and Related Phenomena, 250, Article 147093. https://doi.org/10.1016/j.elspec.2021.147093

Kevy, S. M., Lund, H. E., Wollesen, L., Dalgaard, K. J., Hsu, Y. T., Wiedmann, S., Bianchi, M., Holt, A. J. U., Curcio, D., Biswas, D., Jones, A. J. H., Volckaert, K., Cacho, C., Dudin, P., Hofmann, P. & Bremholm, M. (2021). Structural and electronic inhomogeneity of superconducting Nb-doped Bi₂Se₃. Physical Review B, 103(8), Article 085107. https://doi.org/10.1103/PhysRevB.103.085107

Majchrzak, P., Pakdel, S., Biswas, D., Jones, A. J. H., Volckaert, K., Marković, I., Andreatta, F., Sankar, R., Jozwiak, C., Rotenberg, E., Bostwick, A., Sanders, C. E., Zhang, Y., Karras, G., Chapman, R. T., Wyatt, A., Springate, E., Miwa, J. A., Hofmann, P. ... Ulstrup, S. (2021). Switching of the electron-phonon interaction in 1T-VSe₂ assisted by hot carriers. Physical Review B, 103(24), Article L241108. https://doi.org/10.1103/PhysRevB.103.L241108

Galbiati, M., Persichetti, L., Gori, P., Pulci, O., Bianchi, M., Di Gaspare, L., Tersoff, J., Coletti, C., Hofmann, P., De Seta, M. & Camilli, L. (2021). Tuning the Doping of Epitaxial Graphene on a Conventional Semiconductor via Substrate Surface Reconstruction. Journal of Physical Chemistry Letters, 12(4), 1262-1267. https://doi.org/10.1021/acs.jpclett.0c03649

Curcio, D., Pakdel, S., Volckaert, K., Miwa, J. A., Ulstrup, S., Lanatà, N., Bianchi, M., Kutnyakhov, D., Pressacco, F., Brenner, G., Dziarzhytski, S., Redlin, H., Agustsson, S. Y., Medjanik, K., Vasilyev, D., Elmers, H. J., Schönhense, G., Tusche, C., Chen, Y. J. ... Hofmann, P. (2021). Ultrafast electronic linewidth broadening in the C 1s core level of graphene. Physical Review B, 104(16), Article L161104. https://doi.org/10.1103/PhysRevB.104.L161104

Biswas, D., Jones, A., Majchrzak, P. E., Choi, B. K., Lee, T. H., Volckaert, K., feng, J., Markovic, I., Andreatta, F., Kang, C.-J., kim, H. J., Lee, I. H., Joswiak, C., Rotenberg, E., Bostwick, A., Sanders, C., Zhang, Y., Karras, G., Chapman, R. T. ... Ulstrup, S. (2021). Ultrafast triggering of insulator-metal transition in two-dimensional VSe₂. Nano Letters, 21(5), 1968-1975. https://doi.org/10.1021/acs.nanolett.0c04409

Huang, X., Xiong, R., Volckaert, K., Hao, C., Biswas, D., Bianchi, M., Hofmann, P., Beck, P., Warmuth, J., Sa, B., Wiebe, J. & Wiesendanger, R. (2022). Experimental Realization of Semiconducting Monolayer Si₂Te₂ Films. Advanced Functional Materials, 32(48), Article 2208281. https://doi.org/10.1002/adfm.202208281

Borisenko, S., Fedorov, A., Kuibarov, A., Bianchi, M., Bezguba, V., Majchrzak, P., Hofmann, P., Baumgärtel, P., Voroshnin, V., Kushnirenko, Y., Sánchez-Barriga, J., Varykhalov, A., Ovsyannikov, R., Morozov, I., Aswartham, S., Feia, O., Harnagea, L., Wurmehl, S., Kordyuk, A. ... Büchner, B. (2022). Fermi surface tomography. Nature Communications, 13(1), Article 4132. https://doi.org/10.1038/s41467-022-31841-z

Chikina, A., Bhattacharyya, G., Curcio, D., Sanders, C. E., Bianchi, M., Lanatà, N., Watson, M., Cacho, C., Bremholm, M. & Hofmann, P. (2022). One-dimensional electronic states in a natural misfit structure. Physical Review Materials, 6(9), 1-5. Article L092001. https://doi.org/10.1103/PhysRevMaterials.6.L092001

Michiardi, M., Boschini, F., Kung, H.-H., Na, M. X., Dufresne, S. K. Y., Currie, A., Levy, G., Zhdanovich, S., Mills, A. K., Jones, D. J., Mi, J. L., Iversen, B. B., Hofmann, P. & Damascelli, A. (2022). Optical manipulation of Rashba-split 2-dimensional electron gas. Nature Communications, 13(1), Article 3096. https://doi.org/10.1038/s41467-022-30742-5

Kraus, S., Huttmann, F., Fischer, J., Knispel, T., Bischof, K., Herman, A., Bianchi, M., Stan, R. M., Holt, A. J., Caciuc, V., Tsukamoto, S., Wende, H., Hofmann, P., Atodiresei, N. & Michely, T. (2022). Single-crystal graphene on Ir(110). Physical Review B, 105(16), Article 165405. https://doi.org/10.1103/PhysRevB.105.165405

Curcio, D., Volckaert, K., Kutnyakhov, D., Agustsson, S. Y., Bühlmann, K., Pressacco, F., Heber, M., Dziarzhytski, S., Acremann, Y., Demsar, J., Wurth, W., Sanders, C. E. & Hofmann, P. (2022). Tracking the surface atomic motion in a coherent phonon oscillation. Physical Review B, 106(20), Article L201409. https://doi.org/10.1103/PhysRevB.106.L201409

Kraus, S., Herman, A., Huttmann, F., Bianchi, M., Stan, R. M., Holt, A. J., Tsukamoto, S., Rothenbach, N., Ollefs, K., Dreiser, J., Bischof, K., Wende, H., Hofmann, P., Atodiresei, N. & Michely, T. (2022). Uniaxially Aligned 1D Sandwich-Molecular Wires: Electronic Structure and Magnetism. Journal of Physical Chemistry C, 126(6), 3140-3150. https://doi.org/10.1021/acs.jpcc.1c10625

Jones, A. J. H., Muzzio, R., Pakdel, S., Biswas, D., Curcio, D., Lanata, N., Hofmann, P., McCreary, K. M., Jonker, B. T., Watanabe, K., Taniguchi, T., Singh, S., Koch, R. J., Jozwiak, C., Rotenberg, E., Bostwick, A., Miwa, J. A., Katoch, J. & Ulstrup, S. (2022). Visualizing band structure hybridization and superlattice effects in twisted MoS₂/WS₂heterobilayers. 2D materials, 9(1), Article 015032. https://doi.org/10.1088/2053-1583/ac3feb

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

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

Mortensen, K. O., Zardbani, F., Haque, M. A., Agustsson, S. Y., Mottin, D., Hofmann, P. & Karras, P. (2023). Marigold: Efficient k-means Clustering in High Dimensions. Proceedings of the VLDB Endowment, 16(7), 1740-1748. https://doi.org/10.14778/3587136.3587147

Bianchi, M., Acharya, S., Dirnberger, F., Klein, J., Pashov, D., Mosina, K., Sofer, Z., Rudenko, A. N., Katsnelson, M. I., Van Schilfgaarde, M., Rösner, M. & Hofmann, P. (2023). Paramagnetic electronic structure of CrSBr: Comparison between ab initio GW theory and angle-resolved photoemission spectroscopy. Physical Review B, 107(23), Article 235107. https://doi.org/10.1103/PhysRevB.107.235107

Bianchi, M., Hofmann, P., Hoffmann, S. V., Jones, N. C., Li, Z., Miwa, J., Møller, S. P., Nielsen, J. S., Thomsen, H. D., Ulstrup, S. & Worm, T. (2023). Status and strategy at ISA, centre for storage ring facilities, Aarhus University, Denmark. European Physical Journal Plus, 138(2), Article 132. https://doi.org/10.1140/epjp/s13360-023-03748-1

Volckaert, K., Majchrzak, P. E., Biswas, D., Jones, A., Bianchi, M., Jiang, Z., Dubourg, R., Stenshøj, R. Ø., Jensen, M. L., Jones, N. C., Hoffmann, S. V., Mi, J., Bremholm, M., Pan, X. C., Chen, Y. P., Hofmann, P., Miwa, J. & Ulstrup, S. (2023). Surface electronic structure engineering of manganese bismuth tellurides guided by micro-focused angle-resolved photoemission. Advanced Materials, 35(36), Article 2301907. https://doi.org/10.1002/adma.202301907

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

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

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., 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

Zonno, M., Michiardi, M., Boschini, F., Levy, G., Volckaert, K., Curcio, D., Bianchi, M., Rosa, P. F. S., Fisk, Z., Hofmann, P., Elfimov, I. S., Green, R. J., Sawatzky, G. A. & Damascelli, A. (2024). Mixed-valence state in the dilute-impurity regime of La-substituted SmB₆. Nature Communications, 15, Article 7621. https://doi.org/10.1038/s41467-024-51569-2

Tkáč, V., Vorobiov, S., Baloh, P., Vondráček, M., Springholz, G., Carva, K., Szabó, P., Hofmann, P. & Honolka, J. (2024). Multiphase superconductivity at the interface between ultrathin FeTe islands and Bi₂Te₃. npj 2D Materials and Applications, 8(1), Article 52. https://doi.org/10.1038/s41699-024-00480-x

Berti, A., D'Alessio, M., Bianchi, M., Bignardi, L., Lacovig, P., Sanders, C., Lizzit, S., Hofmann, P., Marrazzo, A. & Baraldi, A. (2024). Unraveling oxygen-driven surface segregation dynamics in platinum-gold alloys. Applied Surface Science, 670, Article 160577. https://doi.org/10.1016/j.apsusc.2024.160577

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

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

Jiang, Z., Lee, D., Jones, A. J. H., Park, Y., Hsieh, K., Majchrzak, P., Sahoo, C., Nielsen, T. S., Watanabe, K., Taniguchi, T., Hofmann, P., Miwa, J. A., Chen, Y. P., Jung, J. & Ulstrup, S. (2025). Direct View of Gate-Tunable Miniband Dispersion in Graphene Superlattices Near the Magic Twist Angle. ACS Nano, 19(2), 2379-2387. https://doi.org/10.1021/acsnano.4c12905

Aretz, J., Grytsiuk, S., Liu, X., Feraco, G., Knekna, C., Waseem, M., Dan, Z., Bianchi, M., Hofmann, P., Ali, M. N., Katsnelson, M. I., Grubišić-Čabo, A., Strand, H. U. R., Van Loon, E. G. C. P. & Rösner, M. (2025). From Strong to Weak Correlations in Breathing-Mode Kagome van der Waals Materials: Nb₃(F, Cl, Br, I)₈ as a Robust and Versatile Platform for Many-Body Engineering. Physical Review X, 15(4), Article 041042. https://doi.org/10.1103/wr7w-nfhg

Meyer, T. C., Siemann, G. R., Majchrzak, P., Seyller, T., Rigden, J., Zhang, Y., Springate, E., Sanders, C. & Hofmann, P. (2025). Line shapes in time- and angle-resolved photoemission spectroscopy explored by machine learning. Electronic Structure, 7(4), Article 045001. https://doi.org/10.1088/2516-1075/ae1e4a

Majchrzak, P., Sanders, C., Zhang, Y., Kuibarov, A., Suvorov, O., Springate, E., Kovalchuk, I., Aswartham, S., Shipunov, G., Büchner, B., Yaresko, A., Borisenko, S. & Hofmann, P. (2025). Machine-learning approach to understanding ultrafast carrier dynamics in the three-dimensional Brillouin zone of PtBi₂. Physical Review Research , 7(1), Article 013025. https://doi.org/10.1103/PhysRevResearch.7.013025

Michiardi, M., Arnold, F., Vaitheeswaran, G., Day, R. P., Fischer, K., Shwetha, G., Kanchana, V., Curcio, D., Volckaert, K., Bianchi, M., Elfimov, I. S., Iversen, B. B., Damascelli, A. & Hofmann, P. (2025). New family of square net materials: Rare-earth diantimonides. Physical Review Materials, 9(12), Article 124201. https://doi.org/10.1103/ybcm-435p

Sahoo, C., 't Veld, Y. I., Jones, A. J. H., Jiang, Z., Lupi, G., Majchrzak, P. E., Hsieh, K., Watanabe, K., Taniguchi, T., Hofmann, P., Miwa, J. A., Chen, Y. P., Rösner, M. & Ulstrup, S. (2025). Quasiparticle Gap Renormalization Driven by Internal and External Screening in a WS_{2} Device. Physical Review Letters, 135(5), Article 056401. https://doi.org/10.1103/yllv-5zx7

Majchrzak, P., Jones, A. J. H., Volckaert, K., Pan, X. C., Hofmann, P., Chen, Y. P., Miwa, J. A. & Ulstrup, S. (2025). Resonantly enhanced photoemission from topological surface states in MnBi₆Te₁₀. Journal of Physics Condensed Matter, 37(38), Article 385501. https://doi.org/10.1088/1361-648X/ae025b

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

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

Sarkar, S., Bhattacharya, J., Bhakuni, P., Jangra, D., Sadhukhan, P., Batabyal, R., Malliakas, C. D., Bianchi, M., Curcio, D., Roy, S., Pariar, A., Barman, S., Balal, M., Di Santo, G., Petaccia, L., Chung, D. Y., Wang, Y., Sathe, V. G., Mandal, P. ... Barman, S. R. (2026). Kramers nodal line in the charge density wave state of YTe₃ and the influence of twin domains. Physical Review B, 113(3), Article 035129. https://doi.org/10.1103/ld4p-hl13

Displaying results 201 to 250 out of 250

Revised 08.12.2025

Lise Refstrup Linnebjerg Pedersen