Spin-resolved photoemission anti-ferromagnets: Direct observation of Zhang-Rice singlets in CuO

LH Tjeng; B Sinkovic; NB Brookes; JB Goedkoop; R Hesper; E Pellegrin; S Altieri; SL Hulbert; E Shekel; GA Sawatzky; Frank de Groot

Spin-resolved photoemission anti-ferromagnets: Direct observation of Zhang-Rice singlets in CuO

LH Tjeng^*, B Sinkovic, NB Brookes, JB Goedkoop, R Hesper, E Pellegrin, S Altieri, SL Hulbert, E Shekel, GA Sawatzky, Frank de Groot

^*Corresponding author for this work

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

Abstract

We demonstrate that it is possible to obtain spin-resolved valence band spectra with a very high degree of spin polarization from antiferromagnetic transition metal materials if the excitation light is circularly polarized and has an energy close to the cation 2p(3/2) (L(3)) white line. We are able to unravel the different spin states in the single-particle excitation spectrum of CuO and show that the top of the valence band is of pure singlet character, which provides strong support for the existence and stability of Zhang-Rice singlets in high-T-c superconductors.

Original language	English
Pages (from-to)	1126-1129
Number of pages	4
Journal	Physical Review Letters
Volume	78
Issue number	6
Publication status	Published - 10 Feb 1997
Externally published	Yes

Keywords

ELECTRONIC-STRUCTURE
SUPERCONDUCTIVITY
ABSORPTION
DICHROISM
LA2CUO4
OXIDES
STATE
HOLES
CU2O

Cite this

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title = "Spin-resolved photoemission anti-ferromagnets: Direct observation of Zhang-Rice singlets in CuO",

abstract = "We demonstrate that it is possible to obtain spin-resolved valence band spectra with a very high degree of spin polarization from antiferromagnetic transition metal materials if the excitation light is circularly polarized and has an energy close to the cation 2p(3/2) (L(3)) white line. We are able to unravel the different spin states in the single-particle excitation spectrum of CuO and show that the top of the valence band is of pure singlet character, which provides strong support for the existence and stability of Zhang-Rice singlets in high-T-c superconductors.",

keywords = "ELECTRONIC-STRUCTURE, SUPERCONDUCTIVITY, ABSORPTION, DICHROISM, LA2CUO4, OXIDES, STATE, HOLES, CU2O",

author = "LH Tjeng and B Sinkovic and NB Brookes and JB Goedkoop and R Hesper and E Pellegrin and S Altieri and SL Hulbert and E Shekel and GA Sawatzky and {de Groot}, Frank",

year = "1997",

month = feb,

day = "10",

language = "English",

volume = "78",

pages = "1126--1129",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "6",

}

TY - JOUR

T1 - Spin-resolved photoemission anti-ferromagnets

T2 - Direct observation of Zhang-Rice singlets in CuO

AU - Tjeng, LH

AU - Sinkovic, B

AU - Brookes, NB

AU - Goedkoop, JB

AU - Hesper, R

AU - Pellegrin, E

AU - Altieri, S

AU - Hulbert, SL

AU - Shekel, E

AU - Sawatzky, GA

AU - de Groot, Frank

PY - 1997/2/10

Y1 - 1997/2/10

N2 - We demonstrate that it is possible to obtain spin-resolved valence band spectra with a very high degree of spin polarization from antiferromagnetic transition metal materials if the excitation light is circularly polarized and has an energy close to the cation 2p(3/2) (L(3)) white line. We are able to unravel the different spin states in the single-particle excitation spectrum of CuO and show that the top of the valence band is of pure singlet character, which provides strong support for the existence and stability of Zhang-Rice singlets in high-T-c superconductors.

AB - We demonstrate that it is possible to obtain spin-resolved valence band spectra with a very high degree of spin polarization from antiferromagnetic transition metal materials if the excitation light is circularly polarized and has an energy close to the cation 2p(3/2) (L(3)) white line. We are able to unravel the different spin states in the single-particle excitation spectrum of CuO and show that the top of the valence band is of pure singlet character, which provides strong support for the existence and stability of Zhang-Rice singlets in high-T-c superconductors.

KW - ELECTRONIC-STRUCTURE

KW - SUPERCONDUCTIVITY

KW - ABSORPTION

KW - DICHROISM

KW - LA2CUO4

KW - OXIDES

KW - STATE

KW - HOLES

KW - CU2O

M3 - Article

SN - 0031-9007

VL - 78

SP - 1126

EP - 1129

JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

ER -

Spin-resolved photoemission anti-ferromagnets: Direct observation of Zhang-Rice singlets in CuO

Abstract

Keywords

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