التفاصيل البيبلوغرافية
| العنوان: |
Coherent quasi-particles-to-incoherent hole-carriers crossover in underdoped cuprates |
| المؤلفون: |
Hashimoto, M., Yoshida, T., Tanaka, K., Fujimori, A., Okusawa, M., Wakimoto, S., Yamada, K., Kakeshita, T., Eisaki, H., Uchida, S. |
| المصدر: |
Phys. Rev. B 79, 140502(R) (2009) |
| سنة النشر: |
2008 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Superconductivity |
| الوصف: |
In underdoped cuprates, only a portion of the Fermi surface survives as Fermi arcs due to pseudogap opening. In hole-doped La$_{2}$CuO$_4$, we have deduced the "coherence temperature" $T_{coh}$ of quasi-particles on the Fermi arc above which the broadened leading edge position in angle-integrated photoemission spectra is shifted away from the Fermi level and the quasi-particle concept starts to lose its meaning. $T_{coh}$ is found to rapidly increase with hole doping, an opposite behavior to the pseudogap temperature $T^*$. The superconducting dome is thus located below both $T^*$ and $T_{coh}$, indicating that the superconductivity emerges out of the coherent Fermionic quasi-particles on the Fermi arc. $T_{coh}$ remains small in the underdoped region, indicating that incoherent charge carriers originating from the Fermi arc are responsible for the apparently metallic transport at high temperatures. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1103/PhysRevB.79.140502 |
| URL الوصول: |
http://arxiv.org/abs/0806.0101 |
| رقم الانضمام: |
edsarx.0806.0101 |
| قاعدة البيانات: |
arXiv |