Dr Gesa-Roxanne Siemann

Leverhulme Early Career Fellow

Researcher profile

Email

grs6@st-andrews.ac.uk

Selected publications

• Open access

  Bulk and surface electronic structure of MoAlB(010)

  Gatti, G., Svaneborg, A. H., Bing, W., Siemann, G.-R., Mortensen, A. S., Kushwaha, N., Rigden, J., Svaneborg, J. K., Watson, M. D., Kim, T. K., Sanders, C. E., Thygesen, K. S., Sofer, Z. & Hofmann, P., 15 Sept 2026, In: Physical Review B. 114, 16, 7 p., 165121.

  Research output: Contribution to journal › Article › peer-review

• Open access

  Clustering-enhanced time- and angle-resolved photoemission study of LaTe₃: absence of a photoinduced secondary charge density wave in the electronic structure

  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., 15 Feb 2026, In: Physical Review B. 113, 7, 11 p., 075137.

  Research output: Contribution to journal › Article › peer-review

• Open access

  Dichotomy of electron-phonon interactions in the delafossite PdCoO₂: from weak bulk to polaronic surface coupling

  Siemann, G.-R., Murgatroyd, P. A. E., Antonelli, T., Morales, E. A., Khim, S., Rosner, H., Watson, M. D., Mackenzie, A. P. & King, P. D. C., 15 Aug 2025, In: Physical Review B. 112, 8, 11 p., 085113.

  Research output: Contribution to journal › Article › peer-review

• Open access

  Avoided metallicity in a hole-doped Mott insulator on a triangular lattice

  Yim, C. M., Siemann, G.-R., Stavrić, S., Khim, S., Benedičič, I., Murgatroyd, P. A. E., Antonelli, T., Watson, M. D., Mackenzie, A. P., Picozzi, S., King, P. D. C. & Wahl, P., 16 Sept 2024, In: Nature Communications. 15, 8 p., 8098 .

  Research output: Contribution to journal › Article › peer-review

• Open access

  Chemical trends of the bulk and surface termination-dependent electronic structure of metal-intercalated transition metal dichalcogenides

  Edwards, B. M., Deaconu, D., Murgatroyd, P., Buchberger, S., Antonelli, T., Halliday, D. R., Siemann, G.-R., Zivanovic, A., Trzaska, L., Rajan, A., Abarca Morales, E., Mayoh, D., Hall, A., Belosludov, R., Watson, M. D., Kim, T., Biswas, D., Lee, T., Polley, C. & Carbone, D. & 4 others, Leandersson, M., Balakrishnan, G., Bahramy, M. & King, P., 13 Aug 2024, In: Chemistry of Materials. 36, 15, p. 7117-7126 10 p.

  Research output: Contribution to journal › Article › peer-review

• Open access

  Controlling the charge density wave transition in single-layer TiTe_2xSe_2(1−x) alloys by band gap engineering

  Antonelli, T., Rajan, A., Watson, M. D., Soltani, S., Houghton, J., Siemann, G.-R., Zivanovic, A., Bigi, C., Edwards, B. M. & King, P., 10 Jan 2024, In: Nano Letters. 24, 1, p. 215-221 7 p., 3c03776.

  Research output: Contribution to journal › Letter › peer-review

• Open access

  Spin-orbit coupling induced Van Hove singularity in proximity to a Lifshitz transition in Sr₄Ru₃O₁₀

  de Almeida Marques, C., Murgatroyd, P., Fittipaldi, R., Osmolska, W., Edwards, B. M., Benedicic, I., Siemann, G.-R., Rhodes, L. C., Buchberger, S., Naritsuka, M., Abarca Morales, E., Halliday, D. R., Polley, C., Leandersson, M., Horio, M., Chang, J., Arumugam, R., Lettieri, M., Granata, V. & Vecchione, A. & 2 others, King, P. & Wahl, P., 8 Apr 2024, In: npj Quantum Materials. 9, 40 p., 35.

  Research output: Contribution to journal › Article › peer-review

• Open access

  Covalency, correlations, and interlayer interactions governing the magnetic and electronic structure of Mn₃Si₂Te₆

  Bigi, C., Qiao, L., Liu, C., Barone, P., Hatnean, M. C., Siemann, G.-R., Achinuq, B., Mayoh, D. A., Vinai, G., Polewczyk, V., Dagur, D., Mazzola, F., Bencok, P., Hesjedal, T., van der Laan, G., Ren, W., Balakrishnan, G., Picozzi, S. & King, P. D. C., 11 Aug 2023, In: Physical Review. B, Condensed matter and materials physics. 108, 5, 10 p., 054419.

  Research output: Contribution to journal › Article › peer-review

• Open access

  Giant valley-Zeeman coupling in the surface layer of an intercalated transition metal dichalcogenide

  Edwards, B., Dowinton, O., Hall, A., Murgatroyd, P., Buchberger, S., Antonelli, T., Siemann, G.-R., Rajan, A., Abarca Morales, E., Zivanovic, A., Bigi, C., Belosludov, R., Polley, M., Carbone, D., Mayoh, D., Balakrishnan, G., Bahramy, M. & King, P., 1 Apr 2023, In: Nature Materials. 22, 4, p. 459-465 7 p.

  Research output: Contribution to journal › Article › peer-review

• Open access

  Hierarchy of Lifshitz transitions in the surface electronic structure of Sr₂RuO₄ under uniaxial compression

  Abarca Morales, E., Siemann, G.-R., Zivanovic, A., Murgatroyd, P., Markovic, I., Edwards, B., Hooley, C., Sokolov, D., Kikugawa, N., Cacho, C., Watson, M., Kim, T., Hicks, C. W., Mackenzie, A. & King, P., 3 Mar 2023, In: Physical Review Letters. 130, 9, 7 p., 096401.

  Research output: Contribution to journal › Article › peer-review

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