Evolution of the pseudogap across the magnet-superconductor phase boundary of Nd2-x Cex Cu O4

H. Matsui; T. Takahashi; T. Sato; K. Terashima; H. Ding; T. Uefuji; K. Yamada

doi:10.1103/PhysRevB.75.224514

Evolution of the pseudogap across the magnet-superconductor phase boundary of Nd2-x Cex Cu O4

H. Matsui, T. Takahashi, T. Sato, K. Terashima, H. Ding, T. Uefuji, K. Yamada

Graduate School of Natural Science and Technology

Research output: Contribution to journal › Article › peer-review

76 Citations (Scopus)

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	https://doi.org/10.1103/PhysRevB.75.224514
Publication status	Published - Jun 29 2007

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1103/PhysRevB.75.224514

Fingerprint Dive into the research topics of 'Evolution of the pseudogap across the magnet-superconductor phase boundary of Nd2-x Cex Cu O4'. Together they form a unique fingerprint.

Cite this

@article{c7993c0cc3bb41ee82eade9922051ff2,

title = "Evolution of the pseudogap across the magnet-superconductor phase boundary of Nd2-x Cex Cu O4",

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.",

author = "H. Matsui and T. Takahashi and T. Sato and K. Terashima and H. Ding and T. Uefuji and K. Yamada",

year = "2007",

month = jun,

day = "29",

doi = "10.1103/PhysRevB.75.224514",

language = "English",

volume = "75",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "22",

}

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, K.

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 -

Evolution of the pseudogap across the magnet-superconductor phase boundary of Nd2-x Cex Cu O4

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Cite this