quasiparticle band
Recently Published Documents


TOTAL DOCUMENTS

164
(FIVE YEARS 12)

H-INDEX

41
(FIVE YEARS 0)

2021 ◽  
Vol 104 (24) ◽  
Author(s):  
Ju Zhou ◽  
Tian-Yi Cai ◽  
Sheng Ju


2021 ◽  
Vol 104 (19) ◽  
Author(s):  
Gabriel Lopez-Candales ◽  
Zhao Tang ◽  
Greis J. Cruz ◽  
Weiyi Xia ◽  
Fanhao Jia ◽  
...  


Author(s):  
Fuli He ◽  
Jia Li ◽  
Linyang Li ◽  
Xiujuan Mao ◽  
Ze Liu ◽  
...  


Author(s):  
Viet-Anh Ha ◽  
George Volonakis ◽  
Hyungjun Lee ◽  
Marios Zacharias ◽  
Feliciano Giustino


2021 ◽  
Vol 104 (8) ◽  
Author(s):  
Azadeh Faridi ◽  
Dimitrie Culcer ◽  
Reza Asgari


2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Nobuyuki Yoshioka ◽  
Wataru Mizukami ◽  
Franco Nori

AbstractEstablishing a predictive ab initio method for solid systems is one of the fundamental goals in condensed matter physics and computational materials science. The central challenge is how to encode a highly-complex quantum-many-body wave function compactly. Here, we demonstrate that artificial neural networks, known for their overwhelming expressibility in the context of machine learning, are excellent tool for first-principles calculations of extended periodic materials. We show that the ground-state energies in real solids in one-, two-, and three-dimensional systems are simulated precisely, reaching their chemical accuracy. The highlight of our work is that the quasiparticle band spectra, which are both essential and peculiar to solid-state systems, can be efficiently extracted with a computational technique designed to exploit the low-lying energy structure from neural networks. This work opens up a path to elucidate the intriguing and complex many-body phenomena in solid-state systems.







2021 ◽  
Vol 103 (1) ◽  
Author(s):  
E. H. Wang ◽  
J. M. Eldridge ◽  
N. T. Brewer ◽  
J. H. Hamilton ◽  
J. C. Batchelder ◽  
...  


Symmetry ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 155
Author(s):  
Kosuke Nakayama ◽  
Koshin Shigekawa ◽  
Katsuaki Sugawara ◽  
Takashi Takahashi ◽  
Takafumi Sato

The discovery of high-temperature (high-Tc) superconductivity in one-monolayer FeSe on SrTiO3 has attracted tremendous attention. Subsequent studies suggested the importance of cooperation between intra-FeSe-layer and interfacial interactions to enhance Tc. However, the nature of intra-FeSe-layer interactions, which would play a primary role in determining the pairing symmetry, remains unclear. Here we have performed high-resolution angle-resolved photoemission spectroscopy of one-monolayer and alkaline-metal-deposited multilayer FeSe films on SrTiO3, and determined the evolution of quasiparticle band dispersion across Tc. We found that the band dispersion in the superconducting state deviates from the Bogoliubov-quasiparticle dispersion expected from the normal-state band dispersion with a constant gap size. This suggests highly anisotropic pairing originating from small momentum transfer and/or mass renormalization due to electron–boson coupling. This band anomaly is interpreted in terms of the electronic interactions within the FeSe layers that may be related to the high-Tc superconductivity in electron-doped FeSe.



Sign in / Sign up

Export Citation Format

Share Document