Fermi surface transformation at the pseudogap critical point of a cuprate superconductor
| Autor: | Fang, Yawen, Grissonnanche, Gael, Legros, Anaelle, Verret, Simon, Laliberte, Francis, Collignon, Clement, Ataei, Amirreza, Dion, Maxime, Zhou, Jianshi, Graf, David, Lawler, M. J., Goddard, Paul, Taillefer, Louis, Ramshaw, B. J. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Nature Physics (2022) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41567-022-01514-1 |
| Popis: | The nature of the pseudogap phase remains a major barrier to our understanding of cuprate high-temperature superconductivity. Whether or not this metallic phase is defined by any of the reported broken symmetries, the topology of its Fermi surface remains a fundamental open question. Here we use angle-dependent magnetoresistance (ADMR) to measure the Fermi surface of the cuprate Nd-LSCO. Above the critical doping $p^*$ -- outside of the pseudogap phase -- we fit the ADMR data and extract a Fermi surface geometry that is in quantitative agreement with angle-resolved photoemission. Below $p^*$ -- within the pseudogap phase -- the ADMR is qualitatively different, revealing a clear transformation of the Fermi surface. Changes in the quasiparticle lifetime across $p^*$ are ruled out as the cause of this transformation. Instead we find that our data are most consistent with a reconstruction of the Fermi surface by a $Q=(\pi, \pi)$ wavevector. Comment: 32 pages, 11 figures |
| Databáze: | arXiv |
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