Working Group Electron Spectroscopy

Selected Publications

[1]	Element-resolved study on the evolution of magnetic response in Fe_xN compounds Y.-C. Chen, D. Gölden, I. Dirba, M.-J. Huang, O. Gutfleisch, P. Nagel, M. Merz, S. Schuppler, G. Schütz, L. Alff, E. Goeringa J. Magnetism and Magnetic Mat. (2019) 166219
[2]	Superior Magnetic Performance in FePt L1₀ Nanomaterials K. Son, G. Ryu, H.-H. Jeong, L. Fink, M. Merz, P. Nagel, S. Schuppler, G. Richter, E. Goering, G. Schütz Small (2019) 1902353
[3]	Nanometric Fe-Substituted ZrO₂ on Carbon Black as PGM-Free ORR Catalyst for PEMFCs P. Madkikar, D. Menga, G. S. Harzer, T. Mittermeier, A. Siebel, F. E. Wagner, M. Merz, S. Schuppler, P. Nagel, A. B. Munoz-Garcia, M. Pavone, H. A. Gasteiger, M. Piana J. Electrochem. Soc. 166 (2019) 3032
[4]	Analyzing the enforcement of a high-spin ground state for a metallacrown single-molecule magnet P. Happ, A. Sapozhnik, J. Klanke, P. Czaja, A. Chernenkaya, K. Medjanik, S. Schuppler, P. Nagel, M. Merz, E. Rentschler, H. J. Elmers Phys. Rev. B 93 (2016) 174404
[5]	Luminescence, patterned metallic regions, and photon-mediated electronic changes in single-sided fluorinated graphene sheets A. L. Walter, H. Sahin, K. J. Jeon, A. Bostwick, S. Horzum, R. Koch, F. Speck, M. Ostler, P. Nagel, M. Merz, S. Schuppler, L. Moreschini, Y. J. Chang, T. Seyller, F. M. Peeters, K. Horn, E. Rotenberg ACS Nano 8 (2014) 7801
[6]	Beyond the Heisenberg model: anisotropic exchange interaction between a Cu-tetraazaporphyrin monolayer and Fe₃O₄ (100) J. Klanke, E. Rentschler, K. Medjanik, D. Kutnyakhov, G. Sch Phys. Rev. Lett. 110 (2013) 137202
[7]	Orbital-Resolved Partial Charge Transfer from the Methoxy Groups of Substituted Pyrenes in Complexes with Tetracyanoquinodimethane-A K. Medjanik. D. Chercka, P. Nagel, M. Merz, S. Schuppler, M. Baumgarten, K. M J. Am. Chem. Soc. 134 (2012) 4694
[8]	Multiplexed lipid dip-pen nanolithography on subcellular scales for the templating of functional proteins and cell culture S. Sekula, J. Fuchs, S. Weg-Remers, P. Nagel, S. Schuppler, J. Fragala, N. Theilacker, M. Franzreb, C. Wingren, P. Ellmark, C. A. K. Borrebaeck, C. A. Mirkin, H. Fuchs, S. Lenhert Small 4 (2008) 1785
[9]	Of Substitution and Doping: Spatial and Electronic Structure in Fe Pnictides M. Merz, P. Schweiss, P. Nagel, M.-J. Huang, R. Eder, T. Wolf, H. v. Löhneysen, S. Schuppler J. Phys. Soc. Jpn. 85 (2016) 44707
[10]	Electronic Structure of Single-Crystalline Sr(Fe_1-xcCo_x)₂As₂ Probed by x-Ray Absorption Spectroscopy: Evidence for Effectively Isovalent Substitution of Fe²⁺ by Co²⁺ M. Merz, F. Eilers, Th. Wolf, P. Nagel, H. v. L Phys. Rev. B 86 (2012) 104503
[11]	Resonant Photoemission Spectroscopy Studies of the Magnetic Phase Transitions in Pr_0.5Sr_0.5MnO₃ P. Pal, M. K. Dalai, B. R. Sekhar, I. Ulfat, M. Merz, P. Nagel, S. Schuppler Physica B 406 (2011) 3519
[12]	Orbital degree of freedom in single-layered La_1-xSr_1+xMnO₄: doping- and temperature-dependent rearrangement of orbital states M. Merz, G. Roth, P. Reutler, B. B Phys. Rev. B 74 (2006) 184414
[13]	Electronic Structure of the Electron-Doped Ca_0.86Pr_0.14MnO₃ M. K. Dalai, P. Pal, B. R. Sekhar, M. Merz, P. Nagel, S. Schuppler, C. Martin Phys. Rev. B 85 (2012) 155128
[14]	Spin and Orbital States in Single-Layered La_2−xCa_xCoO₄ Studied by Doping- and Temperature-Dependent Near-Edge x-Ray Absorption Fine Structure M. Merz, D. Fuchs, A. Assmann, S. Uebe, H. v. L Phys. Rev. B 84 (2011) 14436
[15]	X-Ray Absorption and Magnetic Circular Dichroism of LaCoO₃, La_0.7Ce_0.3CoO₃, and La_0.7Sr_0.3CoO₃ Films: Evidence for Cobalt-Valence-Dependent Magnetism M. Merz, P. Nagel, C. Pinta, A. Samartsev, H. v. L Phys. Rev. B 82 (2010) 174416
[16]	Suppression of spin-state transition in epitaxially strained LaCoO₃ C. Pinta, D. Fuchs, M. Merz, M. Wissinger, E. Arac, H. v. L Phys. Rev. B 78 (2008) 174402
[17]	Double exchange via t_2g orbitals and Jahn-Teller effect in ferromagnetic La_0.7Sr_0.3CoO₃ probed by epitaxial strain D. Fuchs, M. Merz, P. Nagel, R. Schneider, S. Schuppler, H. v. Löhneysen Phys. Rev. Lett. 111 (2013) 257203

Recent Publications

Using strain to uncover the interplay between two- and three-dimensional charge density waves in high-temperature superconducting YBa $_{2}$ Cu $_{3}$ O $_{y}$
Vinograd, I.; Souliou, S. M.; Haghighirad, A.-A.; Lacmann, T.; Caplan, Y.; Frachet, M.; Merz, M.; Garbarino, G.; Liu, Y.; Nakata, S.; Ishida, K.; Noad, H. M. L.; Minola, M.; Keimer, B.; Orgad, D.; Hicks, C. W.; Le Tacon, M.
2024. Nature Communications, 15 (1), Art.-Nr.: 3277. doi:10.1038/s41467-024-47540-w

Orientation of Cobalt-Phthalocyanines on Molybdenum Disulfide: Distinguishing between Single Crystals and Small Flakes
Haizmann, P.; Juriatti, E.; Klein, M.; Greulich, K.; Nagel, P.; Merz, M.; Schuppler, S.; Ghiami, A.; Ovsyannikov, R.; Giangrisostomi, E.; Chassé, T.; Scheele, M.; Peisert, H.
2024. The Journal of Physical Chemistry C, 128 (5), 2107–2115. doi:10.1021/acs.jpcc.3c06707

High-pressure phase diagram of BaNi₂ As₂: Unconventional charge density waves and structural phase transitions
Lacmann, T.; Haghighirad, A.-A.; Souliou, S.-M.; Merz, M.; Garbarino, G.; Glazyrin, K.; Heid, R.; Le Tacon, M.
2023. Physical Review B, 108 (22), Art.-Nr.: 224115. doi:10.1103/PhysRevB.108.224115

Soft-Phonon and Charge-Density-Wave Formation in Nematic BaNi2As2
Souliou, S. M.; Lacmann, T.; Heid, R.; Meingast, C.; Frachet, M.; Paolasini, L.; Haghighirad, A.-A.; Merz, M.; Bosak, A.; Tacon, M. le
2023, September 8. doi:10.35097/1735

Elastoresistivity in the incommensurate charge density wave phase of BaNi₂(As₁₋ₓPₓ)₂
Frachet, M.; Wiecki, P.; Lacmann, T.; Souliou, S. M.; Willa, K.; Meingast, C.; Merz, M.; Haghighirad, A.-A.; Le Tacon, M.; Böhmer, A. E.
2023, September 7. doi:10.35097/1731

Electronic structure of $A C u_{3} C o_{4} O_{12}$ ( $A$ =Y, La, Bi): Synthesis, characterization, core-level spectroscopies, high-pressure application, and ab initio calculation
Kato, Y.; Huang, M.-J.; Kasebayashi, K.; Kawakami, T.; Yamaguchi, T.; Buck, J.; Wang, R.-P.; Kalläne, M.; Rossnagel, K.; Nagel, P.; Schuppler, S.; Takahashi, Y.; Odake, T.; Kawaguchi, S.; Yamada, I.; Hariki, A.
2023. Physical Review Materials, 7 (7), Art.-Nr.: 073401. doi:10.1103/PhysRevMaterials.7.073401

From valence fluctuations to long-range magnetic order in EuPd₂ ( Si₁₋ₓ Geₓ)₂ single crystals
Peters, M.; Kliemt, K.; Ocker, M.; Wolf, B.; Puphal, P.; Le Tacon, M.; Merz, M.; Lang, M.; Krellner, C.
2023. Physical Review Materials, 7 (6), 064405. doi:10.1103/PhysRevMaterials.7.064405

Strong electron-phonon coupling and enhanced phonon Grüneisen parameters in valence-fluctuating metal EuPd $_{2}$ Si $_{2}$
Ye, M.; Westarp, M. J. G., von; Souliou, S.-M.; Peters, M.; Möller, R.; Kliemt, K.; Merz, M.; Heid, R.; Krellner, C.; Le Tacon, M.
2023. Physical Review B, 107 (19), Art.-Nr.: 195111. doi:10.1103/PhysRevB.107.195111

Disentangling Lattice and Electronic Instabilities in the Excitonic Insulator Candidate Ta 2 NiSe 5 by Nonequilibrium Spectroscopy
Katsumi, K.; Alekhin, A.; Souliou, S.-M.; Merz, M.; Haghighirad, A.-A.; Le Tacon, M.; Houver, S.; Cazayous, M.; Sacuto, A.; Gallais, Y.
2023. Physical Review Letters, 130 (10), 106904. doi:10.1103/PhysRevLett.130.106904

Observation of Exchange Interaction in Iron(II) Spin Crossover Molecules in Contact with Passivated Ferromagnetic Surface of Co/Au(111)
Chen, H.; Yang, H.-H.; Frauhammer, T.; You, H.; Sun, Q.; Nagel, P.; Schuppler, S.; Gaspar, A. B.; Real, J. A.; Wulfhekel, W.
2023. Small, 19 (22), Art.-Nr.: 2300251. doi:10.1002/smll.202300251

Monitoring the Formation of Nickel-Poor and Nickel-Rich Oxide Cathode Materials for Lithium-Ion Batteries with Synchrotron Radiation
Ying, B.; Fitzpatrick, J. R.; Teng, Z.; Chen, T.; Lo, T. W. B.; Siozios, V.; Murray, C. A.; Brand, H. E. A.; Day, S.; Tang, C. C.; Weatherup, R. S.; Merz, M.; Nagel, P.; Schuppler, S.; Winter, M.; Kleiner, K.
2023. Chemistry of Materials, 35 (4), 1514–1526. doi:10.1021/acs.chemmater.2c02639

HESEB: The Helmholtz state-of-the-art Soft-X-Ray Undulator beamline at SESAME
Abbadi, A.; Attal, M.; Bahrdt, J.; Drube, W.; Eberhardt, W.; Martin Esser, F.; Follath, R.; Froideval, A.; Fatih Genisel, M.; Groetsch, D.; Rahman Hasoneh, A.; Huck, M.; Huttel, E.; Kanngießer, B.; Knaack, S.; Krueger, O.; Lausi, A.; Lehner, F.; Lörgen, M.; Meseck, A.; Momani, Y.; Al Najdawi, M.; Natour, G.; Paolucci, G.; Rial, E.; Roschka, M.; Scheer, M.; Schramm, B.; Schuppler, S.; Shehab, M.; Siewert, F.; Tiemann, C.; Weissig, A.
2022. Journal of Physics: Conference Series, 2380 (1), 012036. doi:10.1088/1742-6596/2380/1/012036

Soft-Phonon and Charge-Density-Wave Formation in Nematic BaNi₂As₂
Souliou, S. M.; Lacmann, T.; Heid, R.; Meingast, C.; Frachet, M.; Paolasini, L.; Haghighirad, A.-A.; Merz, M.; Bosak, A.; Le Tacon, M.
2022. Physical Review Letters, 129 (24), Article no: 247602. doi:10.1103/PhysRevLett.129.247602

Charge density wave transitions, soft phonon, and possible electronic nematicity in BaNi₂(As₁₋ₓPₓ)₂
Meingast, C.; Shukla, A.; Wang, L.; Heid, R.; Hardy, F.; Frachet, M.; Willa, K.; Lacmann, T.; Le Tacon, M.; Merz, M.; Haghighirad, A.-A.; Wolf, T.
2022. Physical Review B, 106 (14), Article no: 144507. doi:10.1103/PhysRevB.106.144507

Interface Properties of Perfluorinated Iron Phthalocyanine on Au(111) and Ag(111): The Influence of Iron and the Macrocycle
Belser, A.; Greulich, K.; Nagel, P.; Merz, M.; Schuppler, S.; Chassé, T.; Peisert, H.
2022. The Journal of Physical Chemistry C, 126 (33), 14245–14254. doi:10.1021/acs.jpcc.2c02694

Influence of the Pd–Si Ratio on the Valence Transition in EuPd $_{2}$ Si $_{2}$ Single Crystals
Kliemt, K.; Peters, M.; Reiser, I.; Ocker, M.; Walther, F.; Tran, D.-M.; Cho, E.; Merz, M.; Haghighirad, A. A.; Hezel, D. C.; Ritter, F.; Krellner, C.
2022. Crystal Growth and Design, 22 (9), 5399–5406. doi:10.1021/acs.cgd.2c00475

An electronic nematic liquid in BaNi $_{2}$ As $_{2}$
Yao, Y.; Willa, R.; Lacmann, T.; Souliou, S.-M.; Frachet, M.; Willa, K.; Merz, M.; Weber, F.; Meingast, C.; Heid, R.; Haghighirad, A.-A.; Schmalian, J.; Le Tacon, M.
2022. Nature Communications, 13 (1), Art.-Nr.: 4535. doi:10.1038/s41467-022-32112-7

Dynamics of collective modes in an unconventional charge density wave system BaNi2As2
Pokharel, A. R.; Grigorev, V.; Mejas, A.; Dong, T.; Haghighirad, A. A.; Heid, R.; Yao, Y.; Merz, M.; Le Tacon, M.; Demsar, J.
2022. Communications Physics, 5 (1), Artkl.Nr.: 141. doi:10.1038/s42005-022-00919-x

Analyzing the Local Electronic Structure of Co $_{3}$ O $_{4}$ Using 2p3d Resonant Inelastic X-ray Scattering
Wang, R.-P.; Huang, M.-J.; Hariki, A.; Okamoto, J.; Huang, H.-Y.; Singh, A.; Huang, D.-J.; Nagel, P.; Schuppler, S.; Haarman, T.; Liu, B.; de Groot, F. M. F.
2022. The Journal of Physical Chemistry C, 126 (20), 8752–8759. doi:10.1021/acs.jpcc.2c01521

Pressure-temperature phase diagram of BaNi₂As₂
Lacmann, T.; Souliou, S. M.; Merz, M.; Haghighirad, A.-A.; Le Tacon, M.
2022, July 18. 13th International Conference on Materials and Mechanisms of Superconductivity and High Temperarure Superconductors (M2S-HTSC 2022), Vancouver, Canada, July 17–22, 2022

On the Origin of Reversible and Irreversible Reactions in LiNi $_{x}$ Co $_{(1 - x) / 2}$ Mn $_{(1 - x) / 2}$ O $_{2}$
Kleiner, K.; Murray, C. A.; Grosu, C.; Ying, B.; Winter, M.; Nagel, P.; Schuppler, S.; Merz, M.
2021. Journal of the Electrochemical Society, 168 (12), Art.Nr. 120533. doi:10.1149/1945-7111/ac3c21

Reversible and Irreversible Redox Processes in Li-Rich Layered Oxides
Merz, M.; Ying, B.; Nagel, P.; Schuppler, S.; Kleiner, K.
2021. Chemistry of materials, 33 (24), 9534–9545. doi:10.1021/acs.chemmater.1c02573

Rotational symmetry breaking at the incommensurate charge-density-wave transition in Ba(Ni,Co)2(As,P)2: Possible nematic phase induced by charge/orbital fluctuations
Merz, M.; Wang, L.; Wolf, T.; Nagel, P.; Meingast, C.; Schuppler, S.
2021. Physical Review B, 104 (18), Art.-Nr.: 184509. doi:10.1103/PhysRevB.104.184509

In-plane Isotropy of the Low Energy Phonon Anomalies in YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$
Souliou, S.-M.; Sen, K.; Heid, R.; Nakata, S.; Wang, L.; Kim, H.- ho; Uchiyama, H.; Merz, M.; Minola, M.; Keimer, B.; Le Tacon, M.
2021. Journal of the Physical Society of Japan, 90 (11), Art.-Nr.: 111006. doi:10.7566/JPSJ.90.111006

Perfluorinated Phthalocyanines on Cu(110) and Cu(110)-(2 × 1)O: The Special Role of the Central Cobalt Atom
Belser, A.; Greulich, K.; Grüninger, P.; Karstens, R.; Ovsyannikov, R.; Giangrisostomi, E.; Nagel, P.; Merz, M.; Schuppler, S.; Chassé, T.; Peisert, H.
2021. The journal of physical chemistry <Washington, DC> / C, 125 (16), 8803–8814. doi:10.1021/acs.jpcc.1c01215

On the Location of Boron in SiO2‐embedded Si Nanocrystals – An X‐ray Absorption Spectroscopy and Density Functional Theory Study
Hiller, D.; König, D.; Nagel, P.; Merz, M.; Schuppler, S.; Smith, S. C.
2021. Physica status solidi / B, 258 (7), Art.-Nr. 2000623. doi:10.1002/pssb.202000623

Lattice-shifted nematic quantum critical point in $F e S e_{1 - x} S_{x}$
Chibani, S.; Farina, D.; Massat, P.; Cazayous, M.; Sacuto, A.; Urata, T.; Tanabe, Y.; Tanigaki, K.; Böhmer, A. E.; Canfield, P. C.; Merz, M.; Karlsson, S.; Strobel, P.; Toulemonde, P.; Paul, I.; Gallais, Y.
2021. npj quantum materials, 6 (1), Art.-Nr. 37. doi:10.1038/s41535-021-00336-3

Influence of the Fluorination of Iron Phthalocyanine on the Electronic Structure of the Central Metal Atom
Greulich, K.; Trautmann, M.; Belser, A.; Bölke, S.; Karstens, R.; Nagel, P.; Schuppler, S.; Merz, M.; Chassé, A.; Chassé, T.; Peisert, H.
2021. Journal of Physical Chemistry C, 125 (12), 6851–6861. doi:10.1021/acs.jpcc.0c11591

Dominant In-Plane Symmetric Elastoresistance in CsFe₂As₂
Wiecki, P.; Haghighirad, A.-A.; Weber, F.; Merz, M.; Heid, R.; Böhmer, A. E.
2020. Physical review letters, 125 (18), Article no: 187001. doi:10.1103/PhysRevLett.125.187001

From LiNiO₂ to Li₂NiO₃ : Synthesis, Structures and Electrochemical Mechanisms in Li-Rich Nickel Oxides
Bianchini, M.; Schiele, A.; Schweidler, S.; Sicolo, S.; Fauth, F.; Suard, E.; Indris, S.; Mazilkin, A.; Nagel, P.; Schuppler, S.; Merz, M.; Hartmann, P.; Brezesinski, T.; Janek, J.
2020. Chemistry of materials, 32 (21), 9211–9227. doi:10.1021/acs.chemmater.0c02880

Phonon density of states in lanthanide-based nanocrystals
Li, Z. H.; Hudry, D.; Heid, R.; Said, A. H.; Le, M. D.; Popescu, R.; Gerthsen, D.; Merz, M.; Krämer, K. W.; Busko, D.; Howard, I. A.; Richards, B. S.; Weber, F.
2020. Physical review / B, 102 (16), Art.-Nr.: 165409. doi:10.1103/PhysRevB.102.165409

Electronic correlations in the van der Waals ferromagnet Fe₃ GeTe₂ revealed by its charge dynamics
Corasaniti, M.; Yang, R.; Sen, K.; Willa, K.; Merz, M.; Haghighirad, A. A.; Le Tacon, M.; Degiorgi, L.
2020. Physical review / B, 102 (16), Art.-Nr.: 161109. doi:10.1103/PhysRevB.102.161109

Risk analysis of High-Temperature Aquifer Thermal Energy Storage (HT-ATES)
Fleuchaus, P.; Schüppler, S.; Bloemendal, M.; Guglielmetti, L.; Opel, O.; Blum, P.
2020. Renewable & sustainable energy reviews, 133, Art. Nr.: 110153. doi:10.1016/j.rser.2020.110153

Vortex-lattice melting and paramagnetic depairing in the nematic superconductor FeSe
Hardy, F.; Doussoulin, L.; Klein, T.; He, M.; Demuer, A.; Willa, R.; Willa, K.; Haghighirad, A.-A.; Wolf, T.; Merz, M.; Meingast, C.; Marcenat, C.
2020. Physical review research, 2 (3), 033319. doi:10.1103/PhysRevResearch.2.033319

Band engineering of Dirac cones in iron chalcogenides
Lauke, L.; Heid, R.; Merz, M.; Wolf, T.; Haghighirad, A.-A.; Schmalian, J.
2020. Physical review / B, 102 (5), Art.Nr. 054209. doi:10.1103/PhysRevB.102.054209

First-time synthesis of a magnetoelectric core-shell composite via conventional solid-state reaction
Henrichs, L. F.; Mu, X.; Scherer, T.; Gerhards, U.; Schuppler, S.; Nagel, P.; Merz, M.; Kübel, C.; Fawey, M. H.; Hansen, T. C.; Hahn, H.
2020. Nanoscale, 12 (29), 15677–15686. doi:10.1039/d0nr02475a

Band hybridization at the semimetal-semiconductor transition of Ta 2NiSe 5 enabled by mirror-symmetry breaking
Watson, M. D.; Marković, I.; Morales, E. A.; Le Fèvre, P.; Merz, M.; Haghighirad, A. A.; King, P. D. C.
2020. Physical review research, 2 (1), Article no: 013236. doi:10.1103/PhysRevResearch.2.013236

Element-resolved study on the evolution of magnetic response in FexN compounds
Chen, Y.-C.; Gölden, D.; Dirba, I.; Huang, M.-J.; Gutfleisch, O.; Nagel, P.; Merz, M.; Schuppler, S.; Schütz, G.; Alff, L.; Goering, E.
2020. Journal of magnetism and magnetic materials, 498, Article no: 166219. doi:10.1016/j.jmmm.2019.166219

Performance analysis of Aquifer Thermal Energy Storage (ATES)
Fleuchaus, P.; Schüppler, S.; Godschalk, B.; Bakema, G.; Blum, P.
2020. Renewable energy, 146, 1536–1548. doi:10.1016/j.renene.2019.07.030