Charge density waves are periodic modulations in the electronic density of states in materials. We are studying the formation mechanisms of these states by measuring CDW excitations with inelastic scattering and studying domain formation and dynamics with coherent x-rays.

Figure 1: An illustration of measuring collective CDW excitations with RIXS taken from our recent paper H. Miao et al., PRX 9, 031042 (2019).

Example papers

  1. Charge density wave memory in a cuprate superconductor XM Chen, C Mazzoli, Y Cao, V Thampy, AM Barbour, W Hu, M Lu, TA Assefa, H Miao, G Fabbris, G. D. Gu, J. M. Tranquada, M. P. M. Dean, S. B. Wilkins, and I. K. Robinson Nature communications 10, 1435 (2019) [Abs] [PDF] [HTML] [arXiv] [Supp]
  2. Formation of Incommensurate Charge Density Waves in Cuprates H. Miao, R. Fumagalli, M. Rossi, J. Lorenzana, G. Seibold, F. Yakhou-Harris, K. Kummer, N. B. Brookes, G. D. Gu, L. Braicovich, G. Ghiringhelli, and M. P. M. Dean Phys. Rev. X 9, 031042 (2019) [Abs] [PDF] [HTML]
  3. Incommensurate phonon anomaly and the nature of charge density waves in cuprates Hu Miao, D Ishikawa, Rolf Heid, Matthieu Le Tacon, Gilberto Fabbris, Derek Meyers, GD Gu, AQR Baron, and MPM Dean Phys. Rev. X 8, 011008 (2018) [Abs] [PDF] [HTML] [Spring8 Research Highlight]
  4. Doping dependence of collective spin and orbital excitations in the Spin-1 quantum antiferromagnet La2-xSrxNiO4 Observed by X rays G Fabbris, D Meyers, L Xu, VM Katukuri, L Hozoi, X Liu, ZY Chen, J Okamoto, T Schmitt, AC Uldry, B. Delley, G. D. Gu, D. Prabhakaran, A. T. Boothroyd, J. Brink, D. J. Huang, and M. P. M. Dean Phys. Rev. Lett. 118, (2017) [Abs] [PDF] [HTML]
  5. High-temperature charge density wave correlations in La1.875Ba0.125CuO4 without spin–charge locking H Miao, José Lorenzana, Götz Seibold, YY Peng, A Amorese, F Yakhou-Harris, K Kummer, NB Brookes, RM Konik, V Thampy, G. D. Gu, G. Ghiringhelli, L. Braicovich, and M. P. M. Dean Proceedings of the National Academy of Sciences 114, 12430–12435 (2017) [Abs] [PDF] [HTML] [BNL Press Release]
  6. Remarkable stability of charge density wave order in La2-xBaxCuO4 XM Chen, V Thampy, C Mazzoli, AM Barbour, H Miao, GD Gu, Y Cao, JM Tranquada, MPM Dean, and SB Wilkins Phys. Rev. Lett. 117, 167001 (2016) [Abs] [PDF] [HTML] [BNL Press Release]