| Autor: |
Arpaia, Riccardo, Alcalde-Herraiz, Núria, D'Alessio, Andrea, Stepantsov, Evgeny, Wahlberg, Eric, Kalaboukhov, Alexei, Bauch, Thilo, Lombardi, Floriana |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Materials 8, 044803 (2024) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevMaterials.8.044803 |
| Popis: |
In underdoped cuprate high $T_{\mathrm{c}}$ superconductors, various local orders and symmetry breaking states, in addition to superconductivity, reside in the CuO$_2$ planes. The confinement of the CuO$_2$ planes can therefore play a fundamental role in modifying the hierarchy between the various orders and their intertwining with superconductivity. Here we present the growth of $a$-axis oriented YBa$_2$Cu$_3$O$_{7-\delta}$ films, spanning the whole underdoped side of the phase diagram. In these samples, the CuO$_2$ planes are confined by the film thickness, effectively forming unit-cell-thick nanoribbons. The unidirectional confinement at the nanoscale enhances the in-plane anisotropy of the films. By X-ray diffraction and resistance vs temperature measurements, we have discovered the suppression of the orthorhombic-to-tetragonal transition at low dopings, and a very high anisotropy of the normal state resistance in the $b$-$c$ plane, the latter being connected to a weak coupling between adjacent CuO$_2$ nanoribbons. These findings show that the samples we have grown represent a novel system, different from the bulk, where future experiments can possibly shed light on the rich and mysterious physics occurring within the CuO$_2$ planes. |
| Databáze: |
arXiv |
| Externí odkaz: |
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