Abstract
We study the frequency-dependent structure of electronic self-energy in the pseudogap and superconducting states of the two-dimensional Hubbard model. We present the self-energy calculated with the cellular dynamical mean-field theory systematically in the space of temperature, electron density, and interaction strength. We show that the low-frequency part of the self-energy is well represented by a simple equation, which describes the transitions of an electron to and from a hidden-fermionic state. By fitting the numerical data with this simple equation, we determine the parameters characterizing the hidden fermion and discuss its identity. The simple expression of the self-energy offers a way to organize numerical data of these uncomprehended superconducting and pseudogap states, as well as a useful tool to analyze spectroscopic experimental results. The successful description by the simple two-component fermion model supports the idea of "dark" and "bright" fermions emerging from a bare electron as bistable excitations in doped Mott insulators.
| Original language | English |
|---|---|
| Article number | 115130 |
| Journal | Physical Review B |
| Volume | 94 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2016 Sep 13 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Hidden-fermion representation of self-energy in pseudogap and superconducting states of the two-dimensional Hubbard model. / Sakai, Shiro; Civelli, Marcello; Imada, Masatoshi.
In: Physical Review B, Vol. 94, No. 11, 115130, 13.09.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hidden-fermion representation of self-energy in pseudogap and superconducting states of the two-dimensional Hubbard model
AU - Sakai, Shiro
AU - Civelli, Marcello
AU - Imada, Masatoshi
PY - 2016/9/13
Y1 - 2016/9/13
N2 - We study the frequency-dependent structure of electronic self-energy in the pseudogap and superconducting states of the two-dimensional Hubbard model. We present the self-energy calculated with the cellular dynamical mean-field theory systematically in the space of temperature, electron density, and interaction strength. We show that the low-frequency part of the self-energy is well represented by a simple equation, which describes the transitions of an electron to and from a hidden-fermionic state. By fitting the numerical data with this simple equation, we determine the parameters characterizing the hidden fermion and discuss its identity. The simple expression of the self-energy offers a way to organize numerical data of these uncomprehended superconducting and pseudogap states, as well as a useful tool to analyze spectroscopic experimental results. The successful description by the simple two-component fermion model supports the idea of "dark" and "bright" fermions emerging from a bare electron as bistable excitations in doped Mott insulators.
AB - We study the frequency-dependent structure of electronic self-energy in the pseudogap and superconducting states of the two-dimensional Hubbard model. We present the self-energy calculated with the cellular dynamical mean-field theory systematically in the space of temperature, electron density, and interaction strength. We show that the low-frequency part of the self-energy is well represented by a simple equation, which describes the transitions of an electron to and from a hidden-fermionic state. By fitting the numerical data with this simple equation, we determine the parameters characterizing the hidden fermion and discuss its identity. The simple expression of the self-energy offers a way to organize numerical data of these uncomprehended superconducting and pseudogap states, as well as a useful tool to analyze spectroscopic experimental results. The successful description by the simple two-component fermion model supports the idea of "dark" and "bright" fermions emerging from a bare electron as bistable excitations in doped Mott insulators.
UR - http://www.scopus.com/inward/record.url?scp=84990898409&partnerID=8YFLogxK
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U2 - 10.1103/PhysRevB.94.115130
DO - 10.1103/PhysRevB.94.115130
M3 - Article
AN - SCOPUS:84990898409
VL - 94
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 2469-9950
IS - 11
M1 - 115130
ER -