Abstract
Charge dynamics in an interacting fermionic model on a geometrically frustrated lattice are examined. We analyze a spinless fermion model on a paired triangular lattice, an electronic model for layered iron oxides, at zero and finite temperatures by the exact diagonalization methods. We focus on the two charge-ordered (CO) phases, termed CO1/2 and CO1/3, which, respectively, are realized by the intersite Coulomb interaction and quantum/thermal fluctuations. The optical spectra in CO1/3 show multiple components and their low-energy weights survive even below the ordering temperature (TCO). The changes in the dynamical charge correlation below TCO in CO1/3 are weakly momentumdependent, in sharp contrast to those in CO1/2. These characteristic dynamics in CO1/3 are attributable to charge frustration effects and reproduce some aspects of the recent experimental optical and X-ray scattering spectra.
| Original language | English |
|---|---|
| Article number | 023703 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 84 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2015 Feb 15 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Charge dynamics in a correlated fermion system on a geometrically frustrated lattice. / Naka, Makoto; Ishihara, Sumio.
In: Journal of the Physical Society of Japan, Vol. 84, No. 2, 023703, 15.02.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Charge dynamics in a correlated fermion system on a geometrically frustrated lattice
AU - Naka, Makoto
AU - Ishihara, Sumio
PY - 2015/2/15
Y1 - 2015/2/15
N2 - Charge dynamics in an interacting fermionic model on a geometrically frustrated lattice are examined. We analyze a spinless fermion model on a paired triangular lattice, an electronic model for layered iron oxides, at zero and finite temperatures by the exact diagonalization methods. We focus on the two charge-ordered (CO) phases, termed CO1/2 and CO1/3, which, respectively, are realized by the intersite Coulomb interaction and quantum/thermal fluctuations. The optical spectra in CO1/3 show multiple components and their low-energy weights survive even below the ordering temperature (TCO). The changes in the dynamical charge correlation below TCO in CO1/3 are weakly momentumdependent, in sharp contrast to those in CO1/2. These characteristic dynamics in CO1/3 are attributable to charge frustration effects and reproduce some aspects of the recent experimental optical and X-ray scattering spectra.
AB - Charge dynamics in an interacting fermionic model on a geometrically frustrated lattice are examined. We analyze a spinless fermion model on a paired triangular lattice, an electronic model for layered iron oxides, at zero and finite temperatures by the exact diagonalization methods. We focus on the two charge-ordered (CO) phases, termed CO1/2 and CO1/3, which, respectively, are realized by the intersite Coulomb interaction and quantum/thermal fluctuations. The optical spectra in CO1/3 show multiple components and their low-energy weights survive even below the ordering temperature (TCO). The changes in the dynamical charge correlation below TCO in CO1/3 are weakly momentumdependent, in sharp contrast to those in CO1/2. These characteristic dynamics in CO1/3 are attributable to charge frustration effects and reproduce some aspects of the recent experimental optical and X-ray scattering spectra.
UR - http://www.scopus.com/inward/record.url?scp=84925013651&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84925013651&partnerID=8YFLogxK
U2 - 10.7566/JPSJ.84.023703
DO - 10.7566/JPSJ.84.023703
M3 - Article
AN - SCOPUS:84925013651
VL - 84
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 2
M1 - 023703
ER -