--- _id: '8602' abstract: - lang: eng text: Collective cell migration offers a rich field of study for non-equilibrium physics and cellular biology, revealing phenomena such as glassy dynamics, pattern formation and active turbulence. However, how mechanical and chemical signalling are integrated at the cellular level to give rise to such collective behaviours remains unclear. We address this by focusing on the highly conserved phenomenon of spatiotemporal waves of density and extracellular signal-regulated kinase (ERK) activation, which appear both in vitro and in vivo during collective cell migration and wound healing. First, we propose a biophysical theory, backed by mechanical and optogenetic perturbation experiments, showing that patterns can be quantitatively explained by a mechanochemical coupling between active cellular tensions and the mechanosensitive ERK pathway. Next, we demonstrate how this biophysical mechanism can robustly induce long-ranged order and migration in a desired orientation, and we determine the theoretically optimal wavelength and period for inducing maximal migration towards free edges, which fits well with experimentally observed dynamics. We thereby provide a bridge between the biophysical origin of spatiotemporal instabilities and the design principles of robust and efficient long-ranged migration. acknowledgement: We would like to thank G. Tkacik and all of the members of the Hannezo and Hirashima groups for useful discussions, X. Trepat for help on traction force microscopy and M. Matsuda for use of the lab facility. E.H. acknowledges grants from the Austrian Science Fund (FWF) (P 31639) and the European Research Council (851288). T.H. acknowledges a grant from JST, PRESTO (JPMJPR1949). This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 665385 (to D.B.), from JSPS KAKENHI grant no. 17J02107 (to N.H.) and from the SPIRITS 2018 of Kyoto University (to E.H. and T.H.). article_processing_charge: No article_type: original author: - first_name: Daniel R full_name: Boocock, Daniel R id: 453AF628-F248-11E8-B48F-1D18A9856A87 last_name: Boocock orcid: 0000-0002-1585-2631 - first_name: Naoya full_name: Hino, Naoya last_name: Hino - first_name: Natalia full_name: Ruzickova, Natalia id: D2761128-D73D-11E9-A1BF-BA0DE6697425 last_name: Ruzickova - first_name: Tsuyoshi full_name: Hirashima, Tsuyoshi last_name: Hirashima - first_name: Edouard B full_name: Hannezo, Edouard B id: 3A9DB764-F248-11E8-B48F-1D18A9856A87 last_name: Hannezo orcid: 0000-0001-6005-1561 citation: ama: Boocock DR, Hino N, Ruzickova N, Hirashima T, Hannezo EB. Theory of mechanochemical patterning and optimal migration in cell monolayers. Nature Physics. 2021;17:267-274. doi:10.1038/s41567-020-01037-7 apa: Boocock, D. R., Hino, N., Ruzickova, N., Hirashima, T., & Hannezo, E. B. (2021). Theory of mechanochemical patterning and optimal migration in cell monolayers. Nature Physics. Springer Nature. https://doi.org/10.1038/s41567-020-01037-7 chicago: Boocock, Daniel R, Naoya Hino, Natalia Ruzickova, Tsuyoshi Hirashima, and Edouard B Hannezo. “Theory of Mechanochemical Patterning and Optimal Migration in Cell Monolayers.” Nature Physics. Springer Nature, 2021. https://doi.org/10.1038/s41567-020-01037-7. ieee: D. R. Boocock, N. Hino, N. Ruzickova, T. Hirashima, and E. B. Hannezo, “Theory of mechanochemical patterning and optimal migration in cell monolayers,” Nature Physics, vol. 17. Springer Nature, pp. 267–274, 2021. ista: Boocock DR, Hino N, Ruzickova N, Hirashima T, Hannezo EB. 2021. Theory of mechanochemical patterning and optimal migration in cell monolayers. Nature Physics. 17, 267–274. mla: Boocock, Daniel R., et al. “Theory of Mechanochemical Patterning and Optimal Migration in Cell Monolayers.” Nature Physics, vol. 17, Springer Nature, 2021, pp. 267–74, doi:10.1038/s41567-020-01037-7. short: D.R. Boocock, N. Hino, N. Ruzickova, T. Hirashima, E.B. Hannezo, Nature Physics 17 (2021) 267–274. date_created: 2020-10-04T22:01:37Z date_published: 2021-02-01T00:00:00Z date_updated: 2023-08-04T11:02:41Z day: '01' department: - _id: EdHa doi: 10.1038/s41567-020-01037-7 ec_funded: 1 external_id: isi: - '000573519500002' intvolume: ' 17' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1101/2020.05.15.096479 month: '02' oa: 1 oa_version: Preprint page: 267-274 project: - _id: 268294B6-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P31639 name: Active mechano-chemical description of the cell cytoskeleton - _id: 05943252-7A3F-11EA-A408-12923DDC885E call_identifier: H2020 grant_number: '851288' name: Design Principles of Branching Morphogenesis - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program publication: Nature Physics publication_identifier: eissn: - '17452481' issn: - '17452473' publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: link: - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/wound-healing-waves/ record: - id: '12964' relation: dissertation_contains status: public scopus_import: '1' status: public title: Theory of mechanochemical patterning and optimal migration in cell monolayers type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 17 year: '2021' ... --- _id: '8673' abstract: - lang: eng text: In RuCl3, inelastic neutron scattering and Raman spectroscopy reveal a continuum of non-spin-wave excitations that persists to high temperature, suggesting the presence of a spin liquid state on a honeycomb lattice. In the context of the Kitaev model, finite magnetic fields introduce interactions between the elementary excitations, and thus the effects of high magnetic fields that are comparable to the spin-exchange energy scale must be explored. Here, we report measurements of the magnetotropic coefficient—the thermodynamic coefficient associated with magnetic anisotropy—over a wide range of magnetic fields and temperatures. We find that magnetic field and temperature compete to determine the magnetic response in a way that is independent of the large intrinsic exchange-interaction energy. This emergent scale-invariant magnetic anisotropy provides evidence for a high degree of exchange frustration that favours the formation of a spin liquid state in RuCl3. acknowledgement: We thank M. Baenitz, A. Bangura, R. Coldea, G. Jackeli, S. Kivelson, S. Nagler, R. Valenti, C. Varma, S. Winter and J. Zaanen for insightful discussions. Samples were grown at the Max Planck Institute for Chemical Physics of Solids. The d.c.-field measurements were made at the National High Magnetic Field Laboratory (NHMFL) in Tallahassee, FL. The pulsed-field measurements were made in the Pulsed Field Facility of the NHMFL in Los Alamos, NM. All work at the NHMFL is supported through the National Science Foundation Cooperative Agreement nos. DMR-1157490 and DMR-1644779, the US Department of Energy and the State of Florida. R.D.M. acknowledges support from LANL LDRD-DR 20160085 Topology and Strong Correlations. M.C. acknowledges support from the Department of Energy ‘Science of 100 tesla’ BES programme for high-field experiments. X-ray data acquisition and analysis was performed at Cornell University. Research conducted at the Cornell High Energy Synchrotron Source (CHESS) is supported by the National Science Foundation under award no. DMR-1332208. B.J.R. acknowledges support from the Institute for Quantum Matter, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under award no. DE-SC0019331. Y.L. acknowledges support from the US Department of Energy through the LANL/LDRD programme and the G.T. Seaborg institute. J.C.P. is supported by a Gabilan Stanford Graduate Fellowship and an NSF Graduate Research Fellowship (grant no. DGE-114747). P.J.W.M. acknowledges funding from the Swiss National Science Foundation through project no. PP00P2-176789. article_processing_charge: No article_type: original author: - first_name: Kimberly A full_name: Modic, Kimberly A id: 13C26AC0-EB69-11E9-87C6-5F3BE6697425 last_name: Modic orcid: 0000-0001-9760-3147 - first_name: Ross D. full_name: McDonald, Ross D. last_name: McDonald - first_name: J.P.C. full_name: Ruff, J.P.C. last_name: Ruff - first_name: Maja D. full_name: Bachmann, Maja D. last_name: Bachmann - first_name: You full_name: Lai, You last_name: Lai - first_name: Johanna C. full_name: Palmstrom, Johanna C. last_name: Palmstrom - first_name: David full_name: Graf, David last_name: Graf - first_name: Mun K. full_name: Chan, Mun K. last_name: Chan - first_name: F.F. full_name: Balakirev, F.F. last_name: Balakirev - first_name: J.B. full_name: Betts, J.B. last_name: Betts - first_name: G.S. full_name: Boebinger, G.S. last_name: Boebinger - first_name: Marcus full_name: Schmidt, Marcus last_name: Schmidt - first_name: Michael J. full_name: Lawler, Michael J. last_name: Lawler - first_name: D.A. full_name: Sokolov, D.A. last_name: Sokolov - first_name: Philip J.W. full_name: Moll, Philip J.W. last_name: Moll - first_name: B.J. full_name: Ramshaw, B.J. last_name: Ramshaw - first_name: Arkady full_name: Shekhter, Arkady last_name: Shekhter citation: ama: Modic KA, McDonald RD, Ruff JPC, et al. Scale-invariant magnetic anisotropy in RuCl3 at high magnetic fields. Nature Physics. 2021;17:240-244. doi:10.1038/s41567-020-1028-0 apa: Modic, K. A., McDonald, R. D., Ruff, J. P. C., Bachmann, M. D., Lai, Y., Palmstrom, J. C., … Shekhter, A. (2021). Scale-invariant magnetic anisotropy in RuCl3 at high magnetic fields. Nature Physics. Springer Nature. https://doi.org/10.1038/s41567-020-1028-0 chicago: Modic, Kimberly A, Ross D. McDonald, J.P.C. Ruff, Maja D. Bachmann, You Lai, Johanna C. Palmstrom, David Graf, et al. “Scale-Invariant Magnetic Anisotropy in RuCl3 at High Magnetic Fields.” Nature Physics. Springer Nature, 2021. https://doi.org/10.1038/s41567-020-1028-0. ieee: K. A. Modic et al., “Scale-invariant magnetic anisotropy in RuCl3 at high magnetic fields,” Nature Physics, vol. 17. Springer Nature, pp. 240–244, 2021. ista: Modic KA, McDonald RD, Ruff JPC, Bachmann MD, Lai Y, Palmstrom JC, Graf D, Chan MK, Balakirev FF, Betts JB, Boebinger GS, Schmidt M, Lawler MJ, Sokolov DA, Moll PJW, Ramshaw BJ, Shekhter A. 2021. Scale-invariant magnetic anisotropy in RuCl3 at high magnetic fields. Nature Physics. 17, 240–244. mla: Modic, Kimberly A., et al. “Scale-Invariant Magnetic Anisotropy in RuCl3 at High Magnetic Fields.” Nature Physics, vol. 17, Springer Nature, 2021, pp. 240–44, doi:10.1038/s41567-020-1028-0. short: K.A. Modic, R.D. McDonald, J.P.C. Ruff, M.D. Bachmann, Y. Lai, J.C. Palmstrom, D. Graf, M.K. Chan, F.F. Balakirev, J.B. Betts, G.S. Boebinger, M. Schmidt, M.J. Lawler, D.A. Sokolov, P.J.W. Moll, B.J. Ramshaw, A. Shekhter, Nature Physics 17 (2021) 240–244. date_created: 2020-10-18T22:01:37Z date_published: 2021-02-01T00:00:00Z date_updated: 2023-08-04T11:03:39Z day: '01' department: - _id: KiMo doi: 10.1038/s41567-020-1028-0 external_id: arxiv: - '2005.04228' isi: - '000575344700003' intvolume: ' 17' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2005.04228 month: '02' oa: 1 oa_version: Preprint page: 240-244 publication: Nature Physics publication_identifier: eissn: - '17452481' issn: - '17452473' publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Scale-invariant magnetic anisotropy in RuCl3 at high magnetic fields type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 17 year: '2021' ... --- _id: '7942' abstract: - lang: eng text: An understanding of the missing antinodal electronic excitations in the pseudogap state is essential for uncovering the physics of the underdoped cuprate high-temperature superconductors1,2,3,4,5,6. The majority of high-temperature experiments performed thus far, however, have been unable to discern whether the antinodal states are rendered unobservable due to their damping or whether they vanish due to their gapping7,8,9,10,11,12,13,14,15,16,17,18. Here, we distinguish between these two scenarios by using quantum oscillations to examine whether the small Fermi surface pocket, found to occupy only 2% of the Brillouin zone in the underdoped cuprates19,20,21,22,23,24, exists in isolation against a majority of completely gapped density of states spanning the antinodes, or whether it is thermodynamically coupled to a background of ungapped antinodal states. We find that quantum oscillations associated with the small Fermi surface pocket exhibit a signature sawtooth waveform characteristic of an isolated two-dimensional Fermi surface pocket25,26,27,28,29,30,31,32. This finding reveals that the antinodal states are destroyed by a hard gap that extends over the majority of the Brillouin zone, placing strong constraints on a drastic underlying origin of quasiparticle disappearance over almost the entire Brillouin zone in the pseudogap regime7,8,9,10,11,12,13,14,15,16,17,18. acknowledgement: M.H., Y.-T.H. and S.E.S. acknowledge support from the Royal Society, the Winton Programme for the Physics of Sustainability, EPSRC (studentship, grant no. EP/P024947/1 and EPSRC Strategic Equipment grant no. EP/M000524/1) and the European Research Council (grant no. 772891). S.E.S. acknowledges support from the Leverhulme Trust by way of the award of a Philip Leverhulme Prize. H.Z., J.W. and Z.Z. acknowledge support from the National Key Research and Development Program of China (grant no. 2016YFA0401704). A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation Cooperative Agreement no. DMR-1644779, the state of Florida and the US Department of Energy. Work performed by M.K.C., R.D.M. and N.H. was supported by the US DOE BES ‘Science of 100 T’ programme. article_processing_charge: No article_type: letter_note author: - first_name: Máté full_name: Hartstein, Máté last_name: Hartstein - first_name: Yu Te full_name: Hsu, Yu Te last_name: Hsu - first_name: Kimberly A full_name: Modic, Kimberly A id: 13C26AC0-EB69-11E9-87C6-5F3BE6697425 last_name: Modic orcid: 0000-0001-9760-3147 - first_name: Juan full_name: Porras, Juan last_name: Porras - first_name: Toshinao full_name: Loew, Toshinao last_name: Loew - first_name: Matthieu Le full_name: Tacon, Matthieu Le last_name: Tacon - first_name: Huakun full_name: Zuo, Huakun last_name: Zuo - first_name: Jinhua full_name: Wang, Jinhua last_name: Wang - first_name: Zengwei full_name: Zhu, Zengwei last_name: Zhu - first_name: Mun K. full_name: Chan, Mun K. last_name: Chan - first_name: Ross D. full_name: Mcdonald, Ross D. last_name: Mcdonald - first_name: Gilbert G. full_name: Lonzarich, Gilbert G. last_name: Lonzarich - first_name: Bernhard full_name: Keimer, Bernhard last_name: Keimer - first_name: Suchitra E. full_name: Sebastian, Suchitra E. last_name: Sebastian - first_name: Neil full_name: Harrison, Neil last_name: Harrison citation: ama: Hartstein M, Hsu YT, Modic KA, et al. Hard antinodal gap revealed by quantum oscillations in the pseudogap regime of underdoped high-Tc superconductors. Nature Physics. 2020;16:841-847. doi:10.1038/s41567-020-0910-0 apa: Hartstein, M., Hsu, Y. T., Modic, K. A., Porras, J., Loew, T., Tacon, M. L., … Harrison, N. (2020). Hard antinodal gap revealed by quantum oscillations in the pseudogap regime of underdoped high-Tc superconductors. Nature Physics. Springer Nature. https://doi.org/10.1038/s41567-020-0910-0 chicago: Hartstein, Máté, Yu Te Hsu, Kimberly A Modic, Juan Porras, Toshinao Loew, Matthieu Le Tacon, Huakun Zuo, et al. “Hard Antinodal Gap Revealed by Quantum Oscillations in the Pseudogap Regime of Underdoped High-Tc Superconductors.” Nature Physics. Springer Nature, 2020. https://doi.org/10.1038/s41567-020-0910-0. ieee: M. Hartstein et al., “Hard antinodal gap revealed by quantum oscillations in the pseudogap regime of underdoped high-Tc superconductors,” Nature Physics, vol. 16. Springer Nature, pp. 841–847, 2020. ista: Hartstein M, Hsu YT, Modic KA, Porras J, Loew T, Tacon ML, Zuo H, Wang J, Zhu Z, Chan MK, Mcdonald RD, Lonzarich GG, Keimer B, Sebastian SE, Harrison N. 2020. Hard antinodal gap revealed by quantum oscillations in the pseudogap regime of underdoped high-Tc superconductors. Nature Physics. 16, 841–847. mla: Hartstein, Máté, et al. “Hard Antinodal Gap Revealed by Quantum Oscillations in the Pseudogap Regime of Underdoped High-Tc Superconductors.” Nature Physics, vol. 16, Springer Nature, 2020, pp. 841–47, doi:10.1038/s41567-020-0910-0. short: M. Hartstein, Y.T. Hsu, K.A. Modic, J. Porras, T. Loew, M.L. Tacon, H. Zuo, J. Wang, Z. Zhu, M.K. Chan, R.D. Mcdonald, G.G. Lonzarich, B. Keimer, S.E. Sebastian, N. Harrison, Nature Physics 16 (2020) 841–847. date_created: 2020-06-07T22:00:56Z date_published: 2020-08-01T00:00:00Z date_updated: 2023-08-21T07:06:49Z day: '01' department: - _id: KiMo doi: 10.1038/s41567-020-0910-0 external_id: arxiv: - '2005.14123' isi: - '000535464400005' intvolume: ' 16' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2005.14123 month: '08' oa: 1 oa_version: Preprint page: 841-847 publication: Nature Physics publication_identifier: eissn: - '17452481' issn: - '17452473' publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: record: - id: '9708' relation: research_data status: public scopus_import: '1' status: public title: Hard antinodal gap revealed by quantum oscillations in the pseudogap regime of underdoped high-Tc superconductors type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 16 year: '2020' ...