Preprints
Buchen, J., Pardo, O. S., Dobrosavljevic, V. V., Sturhahn, W., Ishii, T., Chariton, S., Greenberg, E., Toellner, T. S. & Jackson, J. M. (2024) The link between water and ferric iron in Earth's lower mantle. Preprint available on EarthArXiv.
Journal Articles & Book Chapters
Trautner, V. E., Rijal, A., Plueckthun, C., Satta, N., Koemets, E., Buchen, J., Wang, B., Glazyrin, K., Cobden, L. & Marquardt, H. (2024) Iron content-dependence of ferropericlase elastic properties across the spin crossover from novel experiments and machine learning. Geophys. Res. Lett., 51, e2024GL111276.
Husband, R. J., Liermann, H. P., McHardy, J. D., ..., Buchen, J., ... and others (2024) Phase transition kinetics of superionic H2O ice phases revealed by Megahertz X-ray free-electron laser-heating experiments. Nat. Commun., 15, 8256.
Husband, R. J., Strohm, C., Appel, K., ..., Buchen, J., ... and others (2023) A MHz X-ray diffraction set-up for dynamic compression experiments in the diamond anvil cell. J. Synchrotron Rad., 30, 671–685.
Jaisle, N., Cébron, D., Konôpková, Z., ..., Buchen, J., ... and others (2023) MHz free electron laser x-ray diffraction and modeling of pulsed laser heated diamond anvil cell. J. Appl. Phys., 134, 095904.
Wang, B., Buchen, J., Méndez, A. S. J., Kurnosov, A., Criniti, G., Liermann, H.-P. & Marquardt, H. (2023) Strong effect of stress on the seismic signature of the post-stishovite phase transition in the Earth's lower mantle. Geophys. Res. Lett., 50, e2023GL102740.
Strozewski, B., Buchen, J., Sturhahn, W., Ishii, T., Ohira, I., Chariton, S., Lavina, B., Zhao, J., Toellner, T. S. & Jackson, J. M. (2023) Equation of state and spin crossover of (Fe,Al)-phase H. J. Geophys. Res. Solid Earth, 128, e2022JB026291.
Miyajima, N., Buchen, J. & Kawazoe, T. (2023) Twinning in hydrous wadsleyite: Symmetry relations, origin, and consequences. Am. Mineral., 108, 2096–2104.
Immoor, J., Miyagi, L., Liermann, H.-P., Speziale, S., Schulze, K., Buchen, J., Kurnosov, A. & Marquardt, H. (2021) Weak cubic CaSiO3 perovskite in the Earth's mantle. Nature, 603, 276–279.
Buchen, J., Sturhahn, W., Ishii, T. & Jackson, J. M. (2021) Vibrational anisotropy of δ-(Al,Fe)OOH single crystals as probed by nuclear resonant inelastic X-ray scattering. Eur. J. Mineral., 33, 485–502.
Buchen, J. (2021) Seismic wave velocities in Earth's mantle from mineral elasticity. In Mantle Convection and Surface Expressions (eds H. Marquardt, M. Ballmer, S. Cottaar & J. Konter) American Geophysical Union, pp. 51–95.
Wang, X., Chen, Q.-F., Niu, F., Wei, S., Ning, J., Li, J., Wang, W., Buchen, J. & Liu, L. (2020) Distinct slab interfaces imaged within the mantle transition zone. Nat. Geosci., 13, 822–827.
Satta, N., Marquardt, H., Kurnosov, A., Buchen, J., Kawazoe, T., McCammon, C. & Boffa Ballaran, T. (2019) Single-crystal elasticity of iron-bearing phase E and seismic detection of water in Earth's upper mantle. Am. Mineral., 104, 1526–1529.
Buchen, J., Wesemann, V., Dehmelt, S., Gross, A. & Rytz, D. (2019) Twins in YAl3(BO3)4 and K2Al2B2O7 crystals as revealed by changes in optical activity. Crystals, 9, 8.
Saki, M., Thomas, C., Cobden, L., Abreu, R. & Buchen, J. (2019) Causes for polarity reversals of PP precursor waves reflecting off the 410 km discontinuity beneath the Atlantic. Phys. Earth Planet. Inter., 286, 111–126.
Marquardt, H., Buchen, J., Mendez, A. S. J., Kurnosov, A., Wendt, M., Rothkirch, A., Pennicard, D. & Liermann H.-P. (2018) Elastic softening of (Mg0.8Fe0.2)O ferropericlase across the iron spin crossover measured at seismic frequencies. Geophys. Res. Lett., 45, 6862–6868.
Buchen, J., Marquardt, H., Schulze, K., Speziale, S., Boffa Ballaran, T., Nishiyama, N. & Hanfland, M. (2018) Equation of state of polycrystalline stishovite across the tetragonal-orthorhombic phase transition. J. Geophys. Res. Solid Earth, 123, 7347–7360.
Immoor, J., Marquardt, H., Miyagi, L., Lin, F., Speziale, S., Merkel, S., Buchen, J., Kurnosov, A. & Liermann, H.-P. (2018) Evidence for {100}<011> slip in ferropericlase in Earth's lower mantle from high-pressure/high-temperature experiments. Earth Planet. Sci. Lett., 489, 251–257.
Buchen, J., Marquardt, H., Speziale, S., Kawazoe, T., Boffa Ballaran, T. & Kurnosov, A. (2018) High-pressure single-crystal elasticity of wadsleyite and the seismic signature of water in the shallow transition zone. Earth Planet. Sci. Lett., 498, 77–87.
Buchen, J., Marquardt, H., Boffa Ballaran, T., Kawazoe, T. & McCammon, C. (2017) The equation of state of wadsleyite solid solutions: Constraining the effects of anisotropy and crystal chemistry. Am. Mineral., 102, 2494–2504.
Schulze, K., Buchen, J., Marquardt, K. & Marquardt, H. (2017) Multi-sample loading technique for comparative physical property measurements in the diamond-anvil cell. High Pressure Res., 37, 159–169.
Kawazoe, T., Buchen, J. & Marquardt, H. (2015) Synthesis of large wadsleyite single crystals by solid-state recrystallization. Am. Mineral., 100, 2336–2339.
Theses
Buchen, J. (2018) The Elastic Properties of Wadsleyite and Stishovite at High Pressures — Tracing Deep Earth Material Cycles. Dissertation, Universität Bayreuth.
Buchen, J. (2013) Absorption Centers and Structural Defects in YAl3(BO3)4. Diplomarbeit, Johannes Gutenberg-Universität Mainz.
Conference Talks*
Buchen, J., Pardo, O. S., Dobrosavljevic, V. V., Sturhahn, W., Ishii, T., Chariton, S., Greenberg, E., Toellner, T. S. & Jackson, J. M. Spin transition links water and ferric iron in Earth's lower mantle. 4th European Mineralogical Conference, Dublin, 18–23 Aug 2024.
Buchen, J., Kurnosov, A., Criniti, G., Marquardt, H. & Boffa Ballaran, T. Single-crystal elastic properties from high-pressure experiments: a comparison of inversion strategies. 32nd Annual Meeting of the German Crystallographic Society, Bayreuth, 18–21 Mar 2024.
Buchen, J., Wang, B., Satta, N., Trautner, V., Criniti, G., Méndez, A. S. J., Liermann, H.-P. & Marquardt, H. Seismic waves in the dynamic DAC: Stress and strain in polycrystalline materials. (Invited) Status and research highlights of the ECB (P02.2) at PETRA III, satellite meeting of the DESY Photon Science Users' Meeting, Hamburg, 22 Jan 2024.
Buchen, J., Wang, B., Satta, N., Trautner, V., Criniti, G., Méndez, A. S. J., Liermann, H.-P. & Marquardt, H. Stress and strain partitioning in polycrystalline materials at high pressures and seismic frequencies. (Invited) AGU Fall Meeting, San Francisco, 11–15 Dec 2023.
Buchen, J., Pardo, O. S., Dobrosavljevic, V. V., Sturhahn, W., Ishii, T., Chariton, S., Greenberg, E., Toellner, T. S. & Jackson, J. M. Linking water and ferric iron in Earth's lower mantle. Goldschmidt Conference, Lyon, 9–14 Jul 2023.
Buchen, J., Wang, B., Satta, N., Trautner, V., Criniti, G., Méndez, A. S. J., Liermann, H.-P. & Marquardt, H. Partitioning of elastic strain in polycrystalline materials at high pressures and seismic frequencies. 18th International Symposium on Experimental Mineralogy, Petrology and Geochemistry, Milano, 12–15 Jun 2023.
Buchen, J., Sturhahn, W. & Jackson, J. M. Thermodynamics of spin transitions: an experimental perspective. (Invited) 23rd General Meeting of the International Mineralogical Association, Lyon, 18–22 Jul 2022.
Buchen, J., Sturhahn, W., Ishii, T. & Jackson, J. M. Vibrational anisotropy of δ-(Al,Fe)OOH: a nuclear resonant inelastic X-ray scattering study on single crystals. 17th International Symposium on Experimental Mineralogy, Petrology and Geochemistry, (online), 1–3 Mar 2021.
Buchen, J., Pardo, O. S., Dobrosavljevic, V. V., Sturhahn, W., Ishii, T., Chariton, S., Greenberg, E. & Jackson, J. M. The equation of state of δ-(Al,Fe)OOH and the behavior of ferric iron in high-pressure oxyhydroxide phases. COMPRES Annual Meeting, (online), 14 Aug 2020.
Buchen, J., Jackson, J. M. & Sturhahn, W. Seismic signatures of continuous phase transitions in Earth's lower mantle. AGU Fall Meeting, San Francisco, 9–13 Dec 2019.
Buchen, J., Marquardt, H., Schulze, K., Speziale, S., Kurnosov, A., Chaudhari, A., Boffa Ballaran, T. & Nishiyama, N. The high-pressure elasticity of polycrystalline stishovite and seismic scattering in Earth's lower mantle. GeoBonn 2018, Bonn, 2–6 Sep 2018.
Buchen, J., Marquardt, H., Schulze, K., Speziale, S., Kurnosov, A., Chaudhari, A., Boffa Ballaran, T. & Nishiyama, N. High-pressure elasticity of polycrystalline stishovite and seismic scattering in Earth's lower mantle. 16th International Symposium on Experimental Mineralogy, Petrology and Geochemistry, Clermont-Ferrand, 17–21 Jun 2018.
Buchen, J., Marquardt, H., Schulze, K., Kurnosov, A., Boffa Ballaran, T., Speziale, S. & Kawazoe, T. Tracing water in the transition zone: from wadsleyite single-crystal elasticity to seismic observables. (Invited) EGU General Assembly, Vienna, 8–13 Apr 2018.
Buchen, J., Marquardt, H., Boffa Ballaran, T., Kawazoe, T., Speziale, S. & Kurnosov, A. How the 410-km discontinuity reflects mantle water content: Constraints from high-pressure experiments on wadsleyite single-crystal elasticity. AGU Fall Meeting, New Orleans, 11–15 Dec 2017.
Buchen, J., Marquardt, H., Kurnosov, A., Speziale, S., Kawazoe, T. & Boffa Ballaran, T. Internally consistent single-crystal elasticity of iron-bearing wadsleyite at high pressures and high temperatures. 2nd European Mineralogical Conference, Rimini, 11–15 Sep 2016.
Buchen, J., Marquardt, H., Kawazoe, T., Kurnosov, A. & Boffa Ballaran, T. High-pressure single- crystal elasticity of wadsleyite: Constraints on seismic anisotropy in the transition zone. GeoBerlin 2015, Berlin, 4–7 Oct 2015.
Conference Posters*
Buchen, J., Wang, B., Satta, N., Trautner, V., Criniti, G., Méndez, A. S. J. & Marquardt, H. Cyclic loading of polycrystalline materials under high pressures. 23rd General Meeting of the International Mineralogical Association, Lyon, 18–22 Jul 2022.
Buchen, J., Pardo, O. S., Dobrosavljevic, V. V., Sturhahn, W., Ishii, T., Chariton, S., Greenberg, E., Toellner, T. S. & Jackson, J. M. The thermal equation of state of δ-(Al,Fe)OOH: a spin–hydrogen connection in Earth's lower mantle? AGU Fall Meeting, New Orleans (online), 13–17 Dec 2021.
Buchen, J., Jackson, J. M., Sturhahn, W. & Ishii, T. Vibrational anisotropy of δ-(Al,Fe)OOH. COMPRES Annual Meeting, Big Sky, 2–5 Aug 2019.
Buchen, J., Marquardt, H., Schulze, K., Speziale, S., Kurnosov, A., Chaudhari, A., Boffa Ballaran, T. & Nishiyama, N. The ferroelastic phase transition in polycrystalline stishovite and seismic scattering in Earth's lower mantle. AGU Fall Meeting, Washington, DC, 10–14 Dec 2018.
Buchen, J., Schulze, K., Marquardt, H., Kurnosov, A., Boffa Ballaran, T., Speziale, S., Kawazoe, T. & Koch-Müller, M. Tracing water in the transition zone: from single-crystal elasticity to seismic observables. GeoBonn 2018, Bonn, 2–6 Sep 2018.
Buchen, J., Marquardt, H., Schulze, K., Kurnosov, A., Chaudhari, A., Boffa Ballaran, T., Speziale, S. & Nishiyama, N. Stiffer than expected: high-pressure elasticity of polycrystalline stishovite questions seismic signature of deep silica. EGU General Assembly, Vienna, 8–13 Apr 2018.
Buchen, J., Marquardt, H., Speziale, S., Kawazoe, T., Boffa Ballaran, T. & Kurnosov, A. High-pressure high-temperature single-crystal elasticity of iron-bearing wadsleyite: Reappraising the water sensitivity of seismic observables. (Best Poster Award) 9th High-Pressure Mineral Physics Seminar, Saint Malo, 24–28 Sep 2017.
Buchen, J., Marquardt, H., Kurnosov, A., Boffa Ballaran, T., Speziale, S. & Kawazoe, T. Internally consistent single-crystal elasticity of (Mg0.89Fe0.11)2SiO4 wadsleyite at high pressures and high temperatures. (AGU Student Travel Grant) AGU Fall Meeting, San Francisco, 12–16 Dec 2016.
Buchen, J., Marquardt, H., Kurnosov, A., Speziale, S., Kawazoe, T. & Boffa Ballaran, T. Internally consistent single-crystal elasticity of (Mg,Fe)2SiO4 wadsleyite at high pressures and high temperatures. 54th European High Pressure Research Group International Meeting on High Pressure Science and Technology, Bayreuth, 4–9 Sep 2016.
Buchen, J., Marquardt, H., Boffa Ballaran, T., Speziale, S., Kawazoe, T. & Kurnosov, A. Internally consistent high-pressure single-crystal elasticity of (Mg,Fe)2SiO4 wadsleyite. International Workshop: New Challenges in Volatile Cycling in the Deep Earth, Sendai, 3–6 Jul 2016.
Buchen, J., Marquardt, H., Boffa Ballaran, T., Speziale, S., Kawazoe, T. & Kurnosov, A. Internally consistent high-pressure single-crystal elasticity of (Mg,Fe)2SiO4 wadsleyite. 15th International Symposium on Experimental Mineralogy, Petrology and Geochemistry, Zürich, 5–8 Jun 2016.
Buchen, J., Marquardt, H., Kawazoe, T., Kurnosov, A. & Boffa Ballaran, T. Internally consistent high-pressure elasticity of single-crystal (Mg,Fe)2SiO4 wadsleyite. Goldschmidt Conference, Prague, 16–21 Aug 2015.
Buchen, J., Wesemann, V., Rytz, D., Häger, T., Buhre, S. & Hofmeister, W. UV-absorption centers and microstructure of YAl3(BO3)4 single crystals. German Crystal Growth Meeting, Halle, 11–14 Mar 2014.
Seminars & Outreach Talks
Buchen, J., Pardo, O. S., Dobrosavljevic, V. V., Sturhahn, W., Ishii, T., Chariton, S., Greenberg, E., Toellner, T. S. & Jackson, J. M. Linking water and ferric iron in Earth's lower mantle. Deutsches GeoForschungsZentrum, Potsdam, 27 May 2024.
Buchen, J. Minerals under pressure: Fragments of a deep-earth mosaic. Universität Bayreuth, Bayreuth, 31 Jan 2024.
Buchen, J. Mineral physics of Earth's lower. mantle: Waves, water, and electrons. Bayerisches Geoinstitut, Universität Bayreuth, Bayreuth, 1 Jun 2022.
Buchen, J. The ocean–tectonics nexus: Diving deeper with high-pressure experiments. Fachbereich Geowissenschaften, Universität Bremen, (online), 20 Aug 2020.
Buchen, J. Mineral physics: Targets and techniques. College of Science and Mathematics, California Polytechnic State University, San Luis Obispo, 6 Mar 2020.
Buchen, J. Defining seismic signatures to trace deep Earth material cycles. Seismological Labora- tory, California Institute of Technology, Pasadena, 25 Jan 2019.
Buchen, J. High-pressure elasticity of wadsleyite and stishovite: Tracing water and silica in Earth's mantle. Institut für Geochemie und Petrologie, Eidgenössische Technische Hochschule Zürich, Zürich, 23 Apr 2018.
Buchen, J. The fast and the faint: seismic signatures of water and silica in Earth's mantle from mineral elasticity measurements. Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie, Sorbonne Université, Paris, 22 Feb 2018.
Buchen, J. & Marquardt, H. Experimentelle Reise in die Tiefe der Erde (experimental journey into the deep Earth). Bayerische Akademie der Wissenschaften, Munich, 20 May 2017.
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