Evidence for a correlated insulator to antiferromagnetic metal transition in CrN

P. A. Bhobe, A. Chainani, M. Taguchi, T. Takeuchi, Ritsuko Eguchi, M. Matsunami, K. Ishizaka, Y. Takata, M. Oura, Y. Senba, H. Ohashi, Y. Nishino, M. Yabashi, K. Tamasaku, T. Ishikawa, K. Takenaka, H. Takagi, S. Shin

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

We investigate the electronic structure of chromium nitride (CrN) across the first-order magnetostructural transition at TN∼286K. Resonant photoemission spectroscopy (PES) shows a gap in the 3d partial density of states at the Fermi level and an on-site Coulomb energy U∼4.5eV, indicating strong electron-electron correlations. Bulk-sensitive high-resolution (6 meV) laser PES reveals a clear Fermi edge indicating an antiferromagnetic metal below TN. Hard x-ray Cr 2p core-level PES shows T-dependent changes across TN which originate from screening due to coherent states as substantiated by cluster model calculations using the experimentally observed U. Electrical resistivity confirms an insulator above TN (Eg∼70meV) becoming a disordered metal below TN. Thus, CrN transforms from a correlated insulator to an antiferromagnetic metal, coupled to the magnetostructural transition.

Original languageEnglish
Article number236404
JournalPhysical Review Letters
Volume104
Issue number23
DOIs
Publication statusPublished - Jun 11 2010
Externally publishedYes

Fingerprint

nitrides
chromium
photoelectric emission
transition metals
insulators
metals
spectroscopy
electrons
screening
electronic structure
electrical resistivity
high resolution
lasers
x rays
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Bhobe, P. A., Chainani, A., Taguchi, M., Takeuchi, T., Eguchi, R., Matsunami, M., ... Shin, S. (2010). Evidence for a correlated insulator to antiferromagnetic metal transition in CrN. Physical Review Letters, 104(23), [236404]. https://doi.org/10.1103/PhysRevLett.104.236404

Evidence for a correlated insulator to antiferromagnetic metal transition in CrN. / Bhobe, P. A.; Chainani, A.; Taguchi, M.; Takeuchi, T.; Eguchi, Ritsuko; Matsunami, M.; Ishizaka, K.; Takata, Y.; Oura, M.; Senba, Y.; Ohashi, H.; Nishino, Y.; Yabashi, M.; Tamasaku, K.; Ishikawa, T.; Takenaka, K.; Takagi, H.; Shin, S.

In: Physical Review Letters, Vol. 104, No. 23, 236404, 11.06.2010.

Research output: Contribution to journalArticle

Bhobe, PA, Chainani, A, Taguchi, M, Takeuchi, T, Eguchi, R, Matsunami, M, Ishizaka, K, Takata, Y, Oura, M, Senba, Y, Ohashi, H, Nishino, Y, Yabashi, M, Tamasaku, K, Ishikawa, T, Takenaka, K, Takagi, H & Shin, S 2010, 'Evidence for a correlated insulator to antiferromagnetic metal transition in CrN', Physical Review Letters, vol. 104, no. 23, 236404. https://doi.org/10.1103/PhysRevLett.104.236404
Bhobe, P. A. ; Chainani, A. ; Taguchi, M. ; Takeuchi, T. ; Eguchi, Ritsuko ; Matsunami, M. ; Ishizaka, K. ; Takata, Y. ; Oura, M. ; Senba, Y. ; Ohashi, H. ; Nishino, Y. ; Yabashi, M. ; Tamasaku, K. ; Ishikawa, T. ; Takenaka, K. ; Takagi, H. ; Shin, S. / Evidence for a correlated insulator to antiferromagnetic metal transition in CrN. In: Physical Review Letters. 2010 ; Vol. 104, No. 23.
@article{a7dc48f39412408e9059837222856f20,
title = "Evidence for a correlated insulator to antiferromagnetic metal transition in CrN",
abstract = "We investigate the electronic structure of chromium nitride (CrN) across the first-order magnetostructural transition at TN∼286K. Resonant photoemission spectroscopy (PES) shows a gap in the 3d partial density of states at the Fermi level and an on-site Coulomb energy U∼4.5eV, indicating strong electron-electron correlations. Bulk-sensitive high-resolution (6 meV) laser PES reveals a clear Fermi edge indicating an antiferromagnetic metal below TN. Hard x-ray Cr 2p core-level PES shows T-dependent changes across TN which originate from screening due to coherent states as substantiated by cluster model calculations using the experimentally observed U. Electrical resistivity confirms an insulator above TN (Eg∼70meV) becoming a disordered metal below TN. Thus, CrN transforms from a correlated insulator to an antiferromagnetic metal, coupled to the magnetostructural transition.",
author = "Bhobe, {P. A.} and A. Chainani and M. Taguchi and T. Takeuchi and Ritsuko Eguchi and M. Matsunami and K. Ishizaka and Y. Takata and M. Oura and Y. Senba and H. Ohashi and Y. Nishino and M. Yabashi and K. Tamasaku and T. Ishikawa and K. Takenaka and H. Takagi and S. Shin",
year = "2010",
month = "6",
day = "11",
doi = "10.1103/PhysRevLett.104.236404",
language = "English",
volume = "104",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "23",

}

TY - JOUR

T1 - Evidence for a correlated insulator to antiferromagnetic metal transition in CrN

AU - Bhobe, P. A.

AU - Chainani, A.

AU - Taguchi, M.

AU - Takeuchi, T.

AU - Eguchi, Ritsuko

AU - Matsunami, M.

AU - Ishizaka, K.

AU - Takata, Y.

AU - Oura, M.

AU - Senba, Y.

AU - Ohashi, H.

AU - Nishino, Y.

AU - Yabashi, M.

AU - Tamasaku, K.

AU - Ishikawa, T.

AU - Takenaka, K.

AU - Takagi, H.

AU - Shin, S.

PY - 2010/6/11

Y1 - 2010/6/11

N2 - We investigate the electronic structure of chromium nitride (CrN) across the first-order magnetostructural transition at TN∼286K. Resonant photoemission spectroscopy (PES) shows a gap in the 3d partial density of states at the Fermi level and an on-site Coulomb energy U∼4.5eV, indicating strong electron-electron correlations. Bulk-sensitive high-resolution (6 meV) laser PES reveals a clear Fermi edge indicating an antiferromagnetic metal below TN. Hard x-ray Cr 2p core-level PES shows T-dependent changes across TN which originate from screening due to coherent states as substantiated by cluster model calculations using the experimentally observed U. Electrical resistivity confirms an insulator above TN (Eg∼70meV) becoming a disordered metal below TN. Thus, CrN transforms from a correlated insulator to an antiferromagnetic metal, coupled to the magnetostructural transition.

AB - We investigate the electronic structure of chromium nitride (CrN) across the first-order magnetostructural transition at TN∼286K. Resonant photoemission spectroscopy (PES) shows a gap in the 3d partial density of states at the Fermi level and an on-site Coulomb energy U∼4.5eV, indicating strong electron-electron correlations. Bulk-sensitive high-resolution (6 meV) laser PES reveals a clear Fermi edge indicating an antiferromagnetic metal below TN. Hard x-ray Cr 2p core-level PES shows T-dependent changes across TN which originate from screening due to coherent states as substantiated by cluster model calculations using the experimentally observed U. Electrical resistivity confirms an insulator above TN (Eg∼70meV) becoming a disordered metal below TN. Thus, CrN transforms from a correlated insulator to an antiferromagnetic metal, coupled to the magnetostructural transition.

UR - http://www.scopus.com/inward/record.url?scp=77953490099&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953490099&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.104.236404

DO - 10.1103/PhysRevLett.104.236404

M3 - Article

AN - SCOPUS:77953490099

VL - 104

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 23

M1 - 236404

ER -