Two-dimensional electron gas at the (001) surface of ferromagnetic EuTiO3
Аутори
Di Capua, RobertoVerma, Manish
Radović, Milan
Plumb, Nicholas C.
Dil, Jan Hugo
Ristić, Zoran
Guedes, Eduardo Bonini
de Luca, Giovanna
Preziosi, Daniele
Wang, Zhiming
Weber, Andrew P.
Pentcheva, Rossitza
Salluzzo, Marco
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Studies on oxide quasi-two-dimensional electron gas (q2DEG) have been a playground for the discovery of novel and sometimes unexpected phenomena, like the reported magnetism at the surface of SrTiO3 (001) and at the interface between nonmagnetic LaAlO3 and SrTiO3 band insulators. However, magnetism in this system is weak and there is evidence of a nonintrinsic origin. Here, by using in situ high-resolution angle-resolved photoemission, we demonstrate that ferromagnetic EuTiO3, the magnetic counterpart of SrTiO3 in the bulk, hosts a q2DEG at its (001) surface. This is confirmed by density functional theory calculations with Hubbard U terms in the presence of oxygen divacancies in various configurations, all of them leading to a spin-polarized q2DEG related to the ferromagnetic order of Eu-4f magnetic moments. The results suggest EuTiO3(001) as a new material platform for oxide q2DEGs, characterized by broken inversion and time-reversal symmetries.
Извор:
Physical Review Research, 2021, 3, 4, L042038-Финансирање / пројекти:
- QUANTOX [731473]
- PRIN project TOP-SPIN [PRIN 20177SL7HC]
- Swiss National Science Foundation [200021 182695]
- German Research Foundation [107745057, subproject G3, 278162697, subproject No. C02]
- Leibniz Rechenzentrum Garching [pr87ro]
- DFG [INST 20876/209-1 FUGG, INST 20876/243-1 FUGG]
DOI: 10.1103/PhysRevResearch.3.L042038
ISSN: 2643-1564
WoS: 000744198000004
Scopus: 2-s2.0-85122571409
Колекције
Институција/група
VinčaTY - JOUR AU - Di Capua, Roberto AU - Verma, Manish AU - Radović, Milan AU - Plumb, Nicholas C. AU - Dil, Jan Hugo AU - Ristić, Zoran AU - Guedes, Eduardo Bonini AU - de Luca, Giovanna AU - Preziosi, Daniele AU - Wang, Zhiming AU - Weber, Andrew P. AU - Pentcheva, Rossitza AU - Salluzzo, Marco PY - 2021 UR - https://vinar.vin.bg.ac.rs/handle/123456789/10118 AB - Studies on oxide quasi-two-dimensional electron gas (q2DEG) have been a playground for the discovery of novel and sometimes unexpected phenomena, like the reported magnetism at the surface of SrTiO3 (001) and at the interface between nonmagnetic LaAlO3 and SrTiO3 band insulators. However, magnetism in this system is weak and there is evidence of a nonintrinsic origin. Here, by using in situ high-resolution angle-resolved photoemission, we demonstrate that ferromagnetic EuTiO3, the magnetic counterpart of SrTiO3 in the bulk, hosts a q2DEG at its (001) surface. This is confirmed by density functional theory calculations with Hubbard U terms in the presence of oxygen divacancies in various configurations, all of them leading to a spin-polarized q2DEG related to the ferromagnetic order of Eu-4f magnetic moments. The results suggest EuTiO3(001) as a new material platform for oxide q2DEGs, characterized by broken inversion and time-reversal symmetries. T2 - Physical Review Research T1 - Two-dimensional electron gas at the (001) surface of ferromagnetic EuTiO3 VL - 3 IS - 4 SP - L042038 DO - 10.1103/PhysRevResearch.3.L042038 ER -
@article{ author = "Di Capua, Roberto and Verma, Manish and Radović, Milan and Plumb, Nicholas C. and Dil, Jan Hugo and Ristić, Zoran and Guedes, Eduardo Bonini and de Luca, Giovanna and Preziosi, Daniele and Wang, Zhiming and Weber, Andrew P. and Pentcheva, Rossitza and Salluzzo, Marco", year = "2021", abstract = "Studies on oxide quasi-two-dimensional electron gas (q2DEG) have been a playground for the discovery of novel and sometimes unexpected phenomena, like the reported magnetism at the surface of SrTiO3 (001) and at the interface between nonmagnetic LaAlO3 and SrTiO3 band insulators. However, magnetism in this system is weak and there is evidence of a nonintrinsic origin. Here, by using in situ high-resolution angle-resolved photoemission, we demonstrate that ferromagnetic EuTiO3, the magnetic counterpart of SrTiO3 in the bulk, hosts a q2DEG at its (001) surface. This is confirmed by density functional theory calculations with Hubbard U terms in the presence of oxygen divacancies in various configurations, all of them leading to a spin-polarized q2DEG related to the ferromagnetic order of Eu-4f magnetic moments. The results suggest EuTiO3(001) as a new material platform for oxide q2DEGs, characterized by broken inversion and time-reversal symmetries.", journal = "Physical Review Research", title = "Two-dimensional electron gas at the (001) surface of ferromagnetic EuTiO3", volume = "3", number = "4", pages = "L042038", doi = "10.1103/PhysRevResearch.3.L042038" }
Di Capua, R., Verma, M., Radović, M., Plumb, N. C., Dil, J. H., Ristić, Z., Guedes, E. B., de Luca, G., Preziosi, D., Wang, Z., Weber, A. P., Pentcheva, R.,& Salluzzo, M.. (2021). Two-dimensional electron gas at the (001) surface of ferromagnetic EuTiO3. in Physical Review Research, 3(4), L042038. https://doi.org/10.1103/PhysRevResearch.3.L042038
Di Capua R, Verma M, Radović M, Plumb NC, Dil JH, Ristić Z, Guedes EB, de Luca G, Preziosi D, Wang Z, Weber AP, Pentcheva R, Salluzzo M. Two-dimensional electron gas at the (001) surface of ferromagnetic EuTiO3. in Physical Review Research. 2021;3(4):L042038. doi:10.1103/PhysRevResearch.3.L042038 .
Di Capua, Roberto, Verma, Manish, Radović, Milan, Plumb, Nicholas C., Dil, Jan Hugo, Ristić, Zoran, Guedes, Eduardo Bonini, de Luca, Giovanna, Preziosi, Daniele, Wang, Zhiming, Weber, Andrew P., Pentcheva, Rossitza, Salluzzo, Marco, "Two-dimensional electron gas at the (001) surface of ferromagnetic EuTiO3" in Physical Review Research, 3, no. 4 (2021):L042038, https://doi.org/10.1103/PhysRevResearch.3.L042038 . .