Abstract
The doping dependence of electronic states in an electron-doped high-temperature superconductor (HTSC) Nd2-x Cex Cu O4 was studied by high-resolution angle-resolved photoemission spectroscopy. We observed that the high-energy pseudogap around the hot spot shows an abrupt filling-in at the magnet-superconductor phase boundary, resulting in the unusual reconstruction of the Fermi surface. The magnitude (ΔPG) and the temperature (T*) at which the pseudogap is filled-in show a close relation to the effective hyperfine coupling energy (Jeff) and the spin-correlation length (ξAF), respectively. These results suggest the magnetic origin of the pseudogap and the unconventional nature of the magnet-superconductor phase transition in electron-doped HTSC.
| Original language | English |
|---|---|
| Article number | 224514 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 75 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - Jun 29 2007 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Evolution of the pseudogap across the magnet-superconductor phase boundary of Nd2-x Cex Cu O4. / Matsui, H.; Takahashi, T.; Sato, T.; Terashima, Kensei; Ding, H.; Uefuji, T.; Yamada, K.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 75, No. 22, 224514, 29.06.2007.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Evolution of the pseudogap across the magnet-superconductor phase boundary of Nd2-x Cex Cu O4
AU - Matsui, H.
AU - Takahashi, T.
AU - Sato, T.
AU - Terashima, Kensei
AU - Ding, H.
AU - Uefuji, T.
AU - Yamada, K.
PY - 2007/6/29
Y1 - 2007/6/29
N2 - The doping dependence of electronic states in an electron-doped high-temperature superconductor (HTSC) Nd2-x Cex Cu O4 was studied by high-resolution angle-resolved photoemission spectroscopy. We observed that the high-energy pseudogap around the hot spot shows an abrupt filling-in at the magnet-superconductor phase boundary, resulting in the unusual reconstruction of the Fermi surface. The magnitude (ΔPG) and the temperature (T*) at which the pseudogap is filled-in show a close relation to the effective hyperfine coupling energy (Jeff) and the spin-correlation length (ξAF), respectively. These results suggest the magnetic origin of the pseudogap and the unconventional nature of the magnet-superconductor phase transition in electron-doped HTSC.
AB - The doping dependence of electronic states in an electron-doped high-temperature superconductor (HTSC) Nd2-x Cex Cu O4 was studied by high-resolution angle-resolved photoemission spectroscopy. We observed that the high-energy pseudogap around the hot spot shows an abrupt filling-in at the magnet-superconductor phase boundary, resulting in the unusual reconstruction of the Fermi surface. The magnitude (ΔPG) and the temperature (T*) at which the pseudogap is filled-in show a close relation to the effective hyperfine coupling energy (Jeff) and the spin-correlation length (ξAF), respectively. These results suggest the magnetic origin of the pseudogap and the unconventional nature of the magnet-superconductor phase transition in electron-doped HTSC.
UR - http://www.scopus.com/inward/record.url?scp=34347370428&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34347370428&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.75.224514
DO - 10.1103/PhysRevB.75.224514
M3 - Article
AN - SCOPUS:34347370428
VL - 75
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 22
M1 - 224514
ER -