Laboratory for Quantum Matter Research
Johan Chang


15 - Strain-tunable charge localization coupled to complex magnetic orders in EuAl$_4$
M. Baumgartner, Xunyang Hong, Tianren Wang, Fazhi Yang, Yuetong Wu, Junzhang Ma, Tian Shang, J. Oppliger, J. Küspert, M. Hücker, O. Ivashko, F. Igoa Saldaña, M. v. Zimmermann, S. Pyon, K. Kudo, M. Nohara, P. Sačer, A. Akrap, N. Barišić, M. Novak, Qisi Wang, J. Chang
arXiv: 2607.07544 (2026)
14 - Collective spin excitations in trilayer nickelate La4Ni3O10
Ying Chan, Yuehong Li, Yujie Yan, Xunyang Hong, Tianren Wang, Marli dos Reis Cantarino, Yinghao Zhu, Enkang Zhang, Lixing Chen, Jun Okamoto, Hsiao-Yu Huang, Di-Jing Huang, N. B. Brookes, Johan Chang, Yao Shen, Jun Zhao, Qisi Wang
arXiv: 2604.04643 (2026)
13 - Direct High-Magnetic-Field Coupling to Stripe Order in a Cuprate Superconductor
Leonardo Martinelli, Izabela Biało, Jens Oppliger, Julia Küspert, Orion Gerguri, Sandro Brunner, Benedikt Eggert, Mark H. Fischer, Jochen Geck, Marein Rahn, Ellen Fogh, Jaewon Choi, Atsuhiko Miyata, Oleksandr Prokhnenko, Zahirul Islam, Fernando Igoa Saldaña, Martin v. Zimmermann, Rachel Nickel, Kurt Kummer, Nicholas B. Brookes, Adheena Painganoor, Paola Caterina Forino, Rasmus Toft-Petersen, Niels Bech Christensen, Xunyang Hong, Qisi Wang, Tohru Kurosawa, Naoki Momono, Migaku Oda, Dmitri V. Novikov, Azat Khadiev, Thomas Herrmannsdörfer, Ana Kurtanidze, Katharina Ollefs, Zuzana Konôpková, Michał Andrzejewski, Minxue Tang, Ulf Zastrau, Alexander Pelka, Hauke Höppner, Jolanta Sztuk-Dambietz, Vratko Rovensky, Torsten Laurus, Erik Brambrink, Björn Näser, Marcin Sikora, Cornelius Strohm, Carsten Baehtz, Shingo Yamamoto, Johan Chang
arXiv: 2606.07349 (2026)
12 - Electronic excitations in the Shastry-Sutherland compound SrCu$_2$(BO$_3$)$_2$
Tariq Leinen, Ola K. Forslund, Eugenio Paris, Nicola Colonna, Marco Caputo, Johan Chang, Gabriel Nagamine, Takashi Tokushima, Conny Såthe, Pascal Puphal, Jeremie Teyssier, Thorsten Schmitt, Nikolay A. Bogdanov, Maria Daghofer, Adrian L. Cavalieri, Flavio Giorgianni
arXiv: 2605.07862 (2026)
11 - Autonomous Diffractometry Enabled by Visual Reinforcement Learning
J. Oppliger, M. Stifter, A. Rüegg, I. Biało, L. Martinelli, P. G. Freeman, D. Prabhakaran, J. Zhao, Q. Wang, J. Chang
arXiv: 2604.11773 (2026)
10 - Correlated charge order intertwined with time-reversal symmetry-breaking nodal superconductivity in the dual flat band kagome superconductor CeRu$_{3}$Si$_{2}$
O. Gerguri, P. Kràl, M. Spitaler, M. Salamin, J. N. Graham, A. Doll, I. Biało, I. Plokhikh, J. Krieger, T. J. Hicken, J. Oppliger, L. Martinelli, A. Steppke, N. Shepelin, R. Khasanov, M. v. Zimmermann, B. Monserrat, H. Luetkens, J. Chang, F. O. von Rohr, Sun-Woo Kim, Z. Guguchia
arXiv: 2603.27408 (2026)
9 - The stripe state at 1/8 Ba doping hosts optimal superconductivity in La-214 cuprates under low in-plane stress
V. Sazgari, S. S. Islam, M. Lamotte, J. N. Graham, O. Gerguri, P. Kràl, I. Maetsu, T. Shiroka, G. Simutis, R. Khasanov, R. Sarkar, A. Steppke, N. A. Shepelin, M. Müller, M. Bartkowiak, M. Janoschek, J. Chang, H. H. Klauss, T. Adachi, G. D. Gu, J. M. Tranquada, H. Luetkens, Z. Guguchia
arXiv: 2603.14108 (2026)
8 - Ambipolar doping-induced surface in-gap state on Mott-insulating Ca$_2$RuO$_4$
M. Horio, T. Wada, V. Granata, R. Fittipaldi, A. Vecchione, J. Chang, I. Matsuda
arXiv: 2602.15610 (2026)
7 - Divergent Pressure Response of Superconductivity in Sc$_{6}$MTe$_{2}$ ($M$ = Fe, Ru and Ir)
J. N. Graham, S. S. Islam, K. Yuchi, P. Král, O. Gerguri, S. Huber, J. Chang, R. Khasanov, Y. Okamoto, Z. Guguchia
arXiv: 2601.15414 (2026)
6 - Orbital Separation of Charge Order and Superconductivity in La2-xSrxCuO4
I. Biało, O. Gerguri, L. Martinelli, J. Küspert, J. Choi, M. Garcia-Fernandez, S. Agrestini, K. J. Zhou, E. Weschke, T. Kurosawa, N. Momono, M. Oda, C. Lin, Q. Wang, J. Chang
arXiv: 2601.01643 (2026)
5 - Extreme Strain Controlled Correlated Metal-Insulator Transition in the Altermagnet CrSb
Cong Li, Mengli Hu, Jianfeng Zhang, Magnus H. Berntsen, Francesco Scali, Dibya Phuyal, Chun Lin, Wanyu Chen, Johan Chang, Oliver J. Clark, Timur K. Kim, Jacek Osiecki, Craig Polley, Balasubramanian Thiagarajan, Zhilin Li, Tao Xiang, Oscar Tjernberg
arXiv: 2512.07683 (2025)
4 - Concurrent Multifractality and Anomalous Hall Response in the Nodal Line Semimetal Fe$_3$GeTe$_2$ Near Localization
Subramanian Mathimalar, Ambikesh Gupta, Yotam Roet, Stanislaw Galeski, Rafal Wawrzynczak, Mikel Garcia-Diez, Iñigo Robredo, Praveen Vir, Nitesh Kumar, Walter Schnelle, Karin von Arx, Julia Küspert, Qisi Wang, Johan Chang, Yasmine Sassa, Ady Stern, Felix von Oppen, Maia G. Vergniory, Claudia Felser, Johannes Gooth, Nurit Avraham, Haim Beidenkopf
arXiv: 2503.04367 (2025)
3 - Observation of collective charge excitations in a cuprate superconductor
Xunyang Hong, Yujie Yan, L. Martinelli, I. Biało, K. von Arx, J. Choi, Y. Sassa, S. Pyon, T. Takayama, H. Takagi, Zhenglu Li, M. Garcia-Fernandez, Ke-Jin Zhou, J. Chang, Qisi Wang
arXiv: 2503.04334 (2025)
2 - Searching for the signature of a pair density wave in YBa2Cu3O6.67 using high energy X-ray diffraction
E. Blackburn, O. Ivashko, E. Campillo, M. von Zimmermann, R. Liang, D. A. Bonn, W. N. Hardy, J. Chang, E. M. Forgan, S. M. Hayden
arXiv: 2310.18302 (2023)
1 - Bulk charge stripe order competing with superconductivity in La2-xSrxCuO4 (x=0.12)
N. B. Christensen, J. Chang, J. Larsen, M. Fujita, M. Oda, M. Ido, N. Momono, E. M. Forgan, A. T. Holmes, J. Mesot, M. Huecker, M. v. Zimmermann
arXiv: 1404.3192 (2014)