Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Bejas, Matias"'
Almost four decades of intense research have been invested to study the physics of high-T$_c$ cuprate superconductors. The recent discovery of high-T$_c$ superconductivity in pressurized bilayer nickelates and its potential similarities with cuprate
Externí odkaz:
http://arxiv.org/abs/2411.00269
Impact of electron correlations on two-particle charge response in electron- and hole-doped cuprates
Autor:
Nag, Abhishek, Zinni, Luciano, Choi, Jaewon, Li, J., Tu, Sijia, Walters, A. C., Agrestini, S., Hayden, S. M., Bejas, Matías, Lin, Zefeng, Yamase, H., Jin, Kui, García-Fernández, M., Fink, J., Greco, Andrés, Zhou, Ke-Jin
Publikováno v:
Phys. Rev. Research 6, 043184 (2024)
Estimating many-body effects that deviate from an independent particle approach, has long been a key research interest in condensed matter physics. Layered cuprates are prototypical systems, where electron-electron interactions are found to strongly
Externí odkaz:
http://arxiv.org/abs/2407.15692
Publikováno v:
Phys. Rev. B 109, 104515 (2024)
Charge excitation spectra are getting clear in cuprate superconductors in momentum-energy space especially around a small momentum region, where plasmon excitations become dominant. Here, we study whether Landau quasiparticles survive in the presence
Externí odkaz:
http://arxiv.org/abs/2404.02200
Publikováno v:
Phys. Rev. B 106, 224512 (2022)
The study of the charge excitations in cuprates is presently an interesting topic because of the development of new and precise x-ray experiments. Based on a large-$N$ formulation of the two-dimensional $t$-$J$ model, which allows us to consider all
Externí odkaz:
http://arxiv.org/abs/2212.08794
Publikováno v:
Commun. Phys. 6, 168 (2023)
Metallic systems exhibit plasmons as elementary charge excitations. This fundamental concept was reinforced also in high-temperature cuprate superconductors recently, although cuprates are not only layered systems but also strongly correlated electro
Externí odkaz:
http://arxiv.org/abs/2208.11421
Publikováno v:
Phys. Rev. B 107, 014503 (2023)
The discovery of superconductivity in infinite-layer nickelates is presently an important topic in condensed-matter physics, and potential similarities to and differences from cuprates are under intense debate. We determine general features of the ch
Externí odkaz:
http://arxiv.org/abs/2207.14359
Publikováno v:
Phys. Rev. B 103, 134504 (2021)
The occurrence of retarded (with glue) and unretarded (without glue) pairing is thoroughly discussed in cuprates. We analyze some aspects of this problem in the context of the t-J-V model in a large-N approximation. When 1/N renormalizations are negl
Externí odkaz:
http://arxiv.org/abs/2104.02288
Publikováno v:
Phys. Rev. B 104, 045141 (2021)
Employing a large-N scheme of the layered t-J model with the long-range Coulomb interaction, which captures fine details of the charge excitation spectra recently observed in cuprate superconductors, we explore the role of the charge fluctuations on
Externí odkaz:
http://arxiv.org/abs/2011.00193
Autor:
Nag, Abhishek, Zhu, M., Bejas, Matias, Li, J., Robarts, H. C., Yamase, Hiroyuki, Petsch, A. N., Song, D., Eisaki, H., Walters, A. C., Garcia-Fernandez, M., Greco, Andres, Hayden, S. M., Zhou, Ke-Jin
Publikováno v:
Phys. Rev. Lett. 125, 257002 (2020)
High Tc superconductors show a rich variety of phases associated with their charge degrees of freedom. Valence charges can give rise to charge ordering or acoustic plasmons in these layered cuprate superconductors. While charge ordering has been obse
Externí odkaz:
http://arxiv.org/abs/2007.07313
Publikováno v:
Phys. Rev. B 102, 024509 (2020)
Recently resonant inelastic x-ray scattering experiments reported fine details of the charge excitations around the in-plane momentum ${\bf q}_{\parallel}=(0,0)$ for various doping rates in electron-doped cuprates ${\rm La_{2-x}Ce_xCuO_4}$. We find t
Externí odkaz:
http://arxiv.org/abs/2001.08009