Abstract
We study the interaction effects on the ground state of nanographite ribbons with zigzag edges. Within the mean-field approximation, we find that there are two possible phases: the singlet superconducting (SS) phase and the excitonic insulator (EI) phase. The two phases are separated by a first-order transition point. After taking into account the low-lying fluctuations around the mean-field solutions, the SS phase becomes a spin liquid phase with one gapless charge mode. On the other hand, all excitations in the EI phase, especially the spin excitations, are gapped.
| Original language | English |
|---|---|
| Pages (from-to) | 1-6 |
| Number of pages | 6 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 66 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 2002 Jan 1 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
}
Ground state of graphite ribbons with zigzag edges. / Lee, Yu Li; Lee, Yu Wen.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 66, No. 24, 01.01.2002, p. 1-6.Research output: Contribution to journal › Article
TY - JOUR
T1 - Ground state of graphite ribbons with zigzag edges
AU - Lee, Yu Li
AU - Lee, Yu Wen
PY - 2002/1/1
Y1 - 2002/1/1
N2 - We study the interaction effects on the ground state of nanographite ribbons with zigzag edges. Within the mean-field approximation, we find that there are two possible phases: the singlet superconducting (SS) phase and the excitonic insulator (EI) phase. The two phases are separated by a first-order transition point. After taking into account the low-lying fluctuations around the mean-field solutions, the SS phase becomes a spin liquid phase with one gapless charge mode. On the other hand, all excitations in the EI phase, especially the spin excitations, are gapped.
AB - We study the interaction effects on the ground state of nanographite ribbons with zigzag edges. Within the mean-field approximation, we find that there are two possible phases: the singlet superconducting (SS) phase and the excitonic insulator (EI) phase. The two phases are separated by a first-order transition point. After taking into account the low-lying fluctuations around the mean-field solutions, the SS phase becomes a spin liquid phase with one gapless charge mode. On the other hand, all excitations in the EI phase, especially the spin excitations, are gapped.
UR - http://www.scopus.com/inward/record.url?scp=85038970369&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85038970369&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.66.245402
DO - 10.1103/PhysRevB.66.245402
M3 - Article
AN - SCOPUS:85038970369
VL - 66
SP - 1
EP - 6
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 24
ER -