TY  - JOUR
AU  - Plumb, N. C.
AU  - Gawryluk, D. J.
AU  - Wang, Y.
AU  - Ristić, Zoran
AU  - Park, J.
AU  - Lv, B. Q.
AU  - Wang, Z.
AU  - Matt, C. E.
AU  - Xu, N.
AU  - Shang, T.
AU  - Conder, K.
AU  - Mesot, J.
AU  - Johnston, S.
AU  - Shi, M.
AU  - Radović, Milan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11085
AB  - We investigate the band structure of BaBiO3, an insulating parent compound of doped high-T-c superconductors, using in situ angle-resolved photoemission spectroscopy on thin films. The data compare favorably overall with density functional theory calculations within the local density approximation, demonstrating that electron correlations are weak. The bands exhibit Brillouin zone folding consistent with known BiO6 breathing distortions. Though the distortions are often thought to coincide with Bi3+/Bi5+ charge ordering, core level spectra show that bismuth is monovalent. We further demonstrate that the bands closest to the Fermi level are primarily oxygen derived, while the bismuth 6s states mostly contribute to dispersive bands at deeper binding energy. The results support a model of Bi-O charge transfer in which hole pairs are localized on combinations of the O 2p orbitals.
T2  - Physical Review Letters
T1  - Momentum-Resolved Electronic Structure of the High-Tc Superconductor Parent Compound BaBiO3
VL  - 117
IS  - 3
SP  - 037002
DO  - 10.1103/PhysRevLett.117.037002
ER  - 

@article{
author = "Plumb, N. C. and Gawryluk, D. J. and Wang, Y. and Ristić, Zoran and Park, J. and Lv, B. Q. and Wang, Z. and Matt, C. E. and Xu, N. and Shang, T. and Conder, K. and Mesot, J. and Johnston, S. and Shi, M. and Radović, Milan",
year = "2016",
abstract = "We investigate the band structure of BaBiO3, an insulating parent compound of doped high-T-c superconductors, using in situ angle-resolved photoemission spectroscopy on thin films. The data compare favorably overall with density functional theory calculations within the local density approximation, demonstrating that electron correlations are weak. The bands exhibit Brillouin zone folding consistent with known BiO6 breathing distortions. Though the distortions are often thought to coincide with Bi3+/Bi5+ charge ordering, core level spectra show that bismuth is monovalent. We further demonstrate that the bands closest to the Fermi level are primarily oxygen derived, while the bismuth 6s states mostly contribute to dispersive bands at deeper binding energy. The results support a model of Bi-O charge transfer in which hole pairs are localized on combinations of the O 2p orbitals.",
journal = "Physical Review Letters",
title = "Momentum-Resolved Electronic Structure of the High-Tc Superconductor Parent Compound BaBiO3",
volume = "117",
number = "3",
pages = "037002",
doi = "10.1103/PhysRevLett.117.037002"
}

Plumb, N. C., Gawryluk, D. J., Wang, Y., Ristić, Z., Park, J., Lv, B. Q., Wang, Z., Matt, C. E., Xu, N., Shang, T., Conder, K., Mesot, J., Johnston, S., Shi, M.,& Radović, M.. (2016). Momentum-Resolved Electronic Structure of the High-Tc Superconductor Parent Compound BaBiO3. in Physical Review Letters, 117(3), 037002.
https://doi.org/10.1103/PhysRevLett.117.037002

Plumb N, Gawryluk D, Wang Y, Ristić Z, Park J, Lv B, Wang Z, Matt C, Xu N, Shang T, Conder K, Mesot J, Johnston S, Shi M, Radović M. Momentum-Resolved Electronic Structure of the High-Tc Superconductor Parent Compound BaBiO3. in Physical Review Letters. 2016;117(3):037002.
doi:10.1103/PhysRevLett.117.037002 .

Plumb, N. C., Gawryluk, D. J., Wang, Y., Ristić, Zoran, Park, J., Lv, B. Q., Wang, Z., Matt, C. E., Xu, N., Shang, T., Conder, K., Mesot, J., Johnston, S., Shi, M., Radović, Milan, "Momentum-Resolved Electronic Structure of the High-Tc Superconductor Parent Compound BaBiO3" in Physical Review Letters, 117, no. 3 (2016):037002,
https://doi.org/10.1103/PhysRevLett.117.037002 . .

TY  - JOUR
AU  - Dhaka, R. S.
AU  - Das, Tanmoy
AU  - Plumb, N. C.
AU  - Ristić, Zoran
AU  - Kong, W.
AU  - Matt, C. E.
AU  - Xu, N.
AU  - Dolui, Kapildeb
AU  - Razzoli, E.
AU  - Medarde, M.
AU  - Patthey, L.
AU  - Shi, M.
AU  - Radović, Milan
AU  - Mesot, Joël
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11086
AB  - We employed in situ pulsed laser deposition (PLD) and angle-resolved photoemission spectroscopy (ARPES) to investigate the mechanism of the metal-insulator transition (MIT) in NdNiO3 (NNO) thin films, grown on NdGaO3(110) and LaAlO3(100) substrates. In the metallic phase, we observe three-dimensional hole and electron Fermi surface (FS) pockets formed from strongly renormalized bands with well-defined quasiparticles. Upon cooling across the MIT in NNO/NGO sample, the quasiparticles lose coherence via a spectral weight transfer from near the Fermi level to localized states forming at higher binding energies. In the case of NNO/LAO, the bands are apparently shifted upward with an additional holelike pocket forming at the corner of the Brillouin zone. We find that the renormalization effects are strongly anisotropic and are stronger in NNO/NGO than NNO/LAO. Our study reveals that substrate-induced strain tunes the crystal field splitting, which changes the FS properties, nesting conditions, and spin-fluctuation strength, and thereby controls the MIT via the formation of an electronic order parameter with QAF∼(1/4,1/4,1/4±δ).
T2  - Physical Review B
T1  - Tuning the metal-insulator transition in NdNiO3 heterostructures via Fermi surface instability and spin fluctuations
VL  - 92
IS  - 3
SP  - 035127
DO  - 10.1103/PhysRevB.92.035127
ER  - 

@article{
author = "Dhaka, R. S. and Das, Tanmoy and Plumb, N. C. and Ristić, Zoran and Kong, W. and Matt, C. E. and Xu, N. and Dolui, Kapildeb and Razzoli, E. and Medarde, M. and Patthey, L. and Shi, M. and Radović, Milan and Mesot, Joël",
year = "2015",
abstract = "We employed in situ pulsed laser deposition (PLD) and angle-resolved photoemission spectroscopy (ARPES) to investigate the mechanism of the metal-insulator transition (MIT) in NdNiO3 (NNO) thin films, grown on NdGaO3(110) and LaAlO3(100) substrates. In the metallic phase, we observe three-dimensional hole and electron Fermi surface (FS) pockets formed from strongly renormalized bands with well-defined quasiparticles. Upon cooling across the MIT in NNO/NGO sample, the quasiparticles lose coherence via a spectral weight transfer from near the Fermi level to localized states forming at higher binding energies. In the case of NNO/LAO, the bands are apparently shifted upward with an additional holelike pocket forming at the corner of the Brillouin zone. We find that the renormalization effects are strongly anisotropic and are stronger in NNO/NGO than NNO/LAO. Our study reveals that substrate-induced strain tunes the crystal field splitting, which changes the FS properties, nesting conditions, and spin-fluctuation strength, and thereby controls the MIT via the formation of an electronic order parameter with QAF∼(1/4,1/4,1/4±δ).",
journal = "Physical Review B",
title = "Tuning the metal-insulator transition in NdNiO3 heterostructures via Fermi surface instability and spin fluctuations",
volume = "92",
number = "3",
pages = "035127",
doi = "10.1103/PhysRevB.92.035127"
}

Dhaka, R. S., Das, T., Plumb, N. C., Ristić, Z., Kong, W., Matt, C. E., Xu, N., Dolui, K., Razzoli, E., Medarde, M., Patthey, L., Shi, M., Radović, M.,& Mesot, J.. (2015). Tuning the metal-insulator transition in NdNiO3 heterostructures via Fermi surface instability and spin fluctuations. in Physical Review B, 92(3), 035127.
https://doi.org/10.1103/PhysRevB.92.035127

Dhaka RS, Das T, Plumb NC, Ristić Z, Kong W, Matt CE, Xu N, Dolui K, Razzoli E, Medarde M, Patthey L, Shi M, Radović M, Mesot J. Tuning the metal-insulator transition in NdNiO3 heterostructures via Fermi surface instability and spin fluctuations. in Physical Review B. 2015;92(3):035127.
doi:10.1103/PhysRevB.92.035127 .

Dhaka, R. S., Das, Tanmoy, Plumb, N. C., Ristić, Zoran, Kong, W., Matt, C. E., Xu, N., Dolui, Kapildeb, Razzoli, E., Medarde, M., Patthey, L., Shi, M., Radović, Milan, Mesot, Joël, "Tuning the metal-insulator transition in NdNiO3 heterostructures via Fermi surface instability and spin fluctuations" in Physical Review B, 92, no. 3 (2015):035127,
https://doi.org/10.1103/PhysRevB.92.035127 . .