A global inversion-symmetry-broken phase inside the pseudogap region of YBa_2Cu_3O_y
| العنوان: | A global inversion-symmetry-broken phase inside the pseudogap region of YBa_2Cu_3O_y |
|---|---|
| المؤلفون: | Ruixing Liang, David Hsieh, N. P. Armitage, Carina Belvin, D. A. Bonn, Walter Hardy, Liuyan Zhao |
| بيانات النشر: | Nature Publishing Group, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Superconductivity, Quantum phase transition, Physics, Phase transition, Condensed matter physics, Strongly Correlated Electrons (cond-mat.str-el), Condensed Matter - Superconductivity, Point reflection, General Physics and Astronomy, FOS: Physical sciences, Fermi surface, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Superconductivity (cond-mat.supr-con), Condensed Matter - Strongly Correlated Electrons, symbols.namesake, Charge ordering, Condensed Matter::Superconductivity, 0103 physical sciences, symbols, 010306 general physics, 0210 nano-technology, Pseudogap, Nernst effect |
| الوصف: | The phase diagram of cuprate high-temperature superconductors features an enigmatic pseudogap region that is characterized by a partial suppression of low energy electronic excitations. Polarized neutron diffraction, Nernst effect, THz polarimetery and ultrasound measurements on YBa$_2$Cu$_3$O$_y$ suggest that the pseudogap onset below a temperature T* coincides with a bona fide thermodynamic phase transition that breaks time-reversal, four-fold rotation and mirror symmetries respectively. However, the full point group above and below T* has not been resolved and the fate of this transition as T* approaches the superconducting critical temperature T$_c$ is poorly understood. Here we reveal the point group of YBa$_2$Cu$_3$O$_y$ inside its pseudogap and neighboring regions using high sensitivity linear and second harmonic optical anisotropy measurements. We show that spatial inversion and two-fold rotational symmetries are broken below T* while mirror symmetries perpendicular to the Cu-O plane are absent at all temperatures. This transition occurs over a wide doping range and persists inside the superconducting dome, with no detectable coupling to either charge ordering or superconductivity. These results suggest that the pseudogap region coincides with an odd-parity order that does not arise from a competing Fermi surface instability and exhibits a quantum phase transition inside the superconducting dome. Comment: 14 pages main text, 4 figures, 11 pages supplementary information, Nature Physics (2016) |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22a669a098071e5aa09898671c7a1b15 https://resolver.caltech.edu/CaltechAUTHORS:20161014-080142438 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....22a669a098071e5aa09898671c7a1b15 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |