Institute of Fundamental Technological Research
Polish Academy of Sciences

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Nicholas Wakeham


Recent publications
1.  Chudziński P., Berben M., Xu X., Wakeham N., Bernáth B., Duffy C., Hinlopen R., Hsu Y., Wiedmann S., Tinnemans P., Jin R., Greenblatt M., Hussey N., Emergent symmetry in a low-dimensional superconductor on the edge of Mottness, Science, ISSN: 0036-8075, DOI: 10.1126/science.abp8948, Vol.382, pp.792-796, 2023

Abstract:
Upon cooling, condensed-matter systems typically transition into states of lower symmetry. The converse—i.e., the emergence of higher symmetry at lower temperatures—is extremely rare. In this work, we show how an unusually isotropic magnetoresistance in the highly anisotropic, one-dimensional conductor Li0.9Mo6O17 and its temperature dependence can be interpreted as a renormalization group (RG) flow toward a so-called separatrix. This approach is equivalent to an emergent symmetry in the system. The existence of two distinct ground states, Mott insulator and superconductor, can then be traced back to two opposing RG trajectories. By establishing a direct link between quantum field theory and an experimentally measurable quantity, we uncover a path through which emergent symmetry might be identified in other candidate materials.

Affiliations:
Chudziński P. - IPPT PAN
Berben M. - other affiliation
Xu X. - other affiliation
Wakeham N. - other affiliation
Bernáth B. - other affiliation
Duffy C. - other affiliation
Hinlopen R. - other affiliation
Hsu Y. - other affiliation
Wiedmann S. - other affiliation
Tinnemans P. - other affiliation
Jin R. - other affiliation
Greenblatt M. - other affiliation
Hussey N. - other affiliation

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