Crossover from 2D Ferromagnetic Insulator to Wide Band Gap Quantum Anomalous Hall Insulator in Ultrathin MnBi2Te4

Trang, Chi Xuan; Li, Qile; Yin, Yuefeng; Hwang, Jinwoong; Akhgar, Golrokh; Di Bernardo, Iolanda; Grubišić-Čabo, Antonija; Tadich, Anton; Fuhrer, Michael S.; Mo, Sung-Kwan; Medhekar, Nikhil V.; Edmonds, Mark T.

doi:10.1021/acsnano.1c03936

Crossover from 2D Ferromagnetic Insulator to Wide Band Gap Quantum Anomalous Hall Insulator in Ultrathin MnBi₂Te₄

Journal Article · Fri Aug 13 00:00:00 EDT 2021 · ACS Nano

DOI:https://doi.org/10.1021/acsnano.1c03936· OSTI ID:1818276

^[1]; Li, Qile ^[1]; Yin, Yuefeng ^[1]; Hwang, Jinwoong ^[2]; Akhgar, Golrokh ^[1]; ^[1]; ^[3]; Tadich, Anton ^[4]; ^[1]; ^[2]; ^[1]; ^[1]

Monash Univ., Clayton, VIC (Australia)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
KTH, Applied Physics, Stockholm (Sweden)
Australian Synchrotron, Clayton, VIC (Australia)

Intrinsic magnetic topological insulators offer low disorder and large magnetic band gaps for robust magnetic topological phases operating at higher temperatures. By controlling the layer thickness, emergent phenomena such as the quantum anomalous Hall (QAH) effect and axion insulator phases have been realized. Furthermore, these observations occur at temperatures significantly lower than the Néel temperature of bulk MnBi₂Te₄, and measurement of the magnetic energy gap at the Dirac point in ultrathin MnBi₂Te₄ has yet to be achieved. Critical to achieving the promise of this system is a direct measurement of the layer-dependent energy gap and verification of a temperature-dependent topological phase transition from a large band gap QAH insulator to a gapless TI paramagnetic phase. Here we utilize temperature-dependent angle-resolved photoemission spectroscopy to study epitaxial ultrathin MnBi₂Te₄. We directly observe a layer-dependent crossover from a 2D ferromagnetic insulator with a band gap greater than 780 meV in one septuple layer (1 SL) to a QAH insulator with a large energy gap (>70 meV) at 8 K in 3 and 5 SL MnBi₂Te₄. The QAH gap is confirmed to be magnetic in origin, as it becomes gapless with increasing temperature above 8 K.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1818276

Journal Information:: ACS Nano, Journal Name: ACS Nano Journal Issue: 8 Vol. 15; ISSN 1936-0851

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

References (37)

Intrinsic Topological Insulator Bi2Te3 Thin Films on Si and Their Thickness Limit Li, Yao-Yi; Wang, Guang; Zhu, Xie-Gang Advanced Materials, Vol. 22, Issue 36 https://doi.org/10.1002/adma.201000368	journal	July 2010
Enhancing the Quantum Anomalous Hall Effect by Magnetic Codoping in a Topological Insulator Ou, Yunbo; Liu, Chang; Jiang, Gaoyuan Advanced Materials, Vol. 30, Issue 1 https://doi.org/10.1002/adma.201703062	journal	November 2017
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set Kresse, G.; Furthmüller, J. Computational Materials Science, Vol. 6, Issue 1, p. 15-50 https://doi.org/10.1016/0927-0256(96)00008-0	journal	July 1996
Chemical Aspects of the Candidate Antiferromagnetic Topological Insulator MnBi ₂ Te ₄ Zeugner, Alexander; Nietschke, Frederik; Wolter, Anja U. B. Chemistry of Materials, Vol. 31, Issue 8 https://doi.org/10.1021/acs.chemmater.8b05017	journal	March 2019
Large-Gap Magnetic Topological Heterostructure Formed by Subsurface Incorporation of a Ferromagnetic Layer Hirahara, Toru; Eremeev, Sergey V.; Shirasawa, Tetsuroh Nano Letters, Vol. 17, Issue 6 https://doi.org/10.1021/acs.nanolett.7b00560	journal	May 2017
Ferromagnetism in one-dimensional monatomic metal chains Gambardella, P.; Dallmeyer, A.; Maiti, K. Nature, Vol. 416, Issue 6878 https://doi.org/10.1038/416301a	journal	March 2002
High-precision realization of robust quantum anomalous Hall state in a hard ferromagnetic topological insulator Chang, Cui-Zu; Zhao, Weiwei; Kim, Duk Y. Nature Materials, Vol. 14, Issue 5 https://doi.org/10.1038/nmat4204	journal	March 2015
Dynamical axion field in topological magnetic insulators Li, Rundong; Wang, Jing; Qi, Xiao-Liang Nature Physics, Vol. 6, Issue 4 https://doi.org/10.1038/nphys1534	journal	March 2010
Crossover of the three-dimensional topological insulator Bi2Se3 to the two-dimensional limit Zhang, Yi; He, Ke; Chang, Cui-Zu Nature Physics, Vol. 6, Issue 8 https://doi.org/10.1038/nphys1689	journal	June 2010
Robust axion insulator and Chern insulator phases in a two-dimensional antiferromagnetic topological insulator Liu, Chang; Wang, Yongchao; Li, Hao Nature Materials https://doi.org/10.1038/s41563-019-0573-3	journal	January 2020
Large magnetic gap at the Dirac point in Bi2Te3/MnBi2Te4 heterostructures Rienks, E. D. L.; Wimmer, S.; Sánchez-Barriga, J. Nature, Vol. 576, Issue 7787 https://doi.org/10.1038/s41586-019-1826-7	journal	December 2019
Prediction and observation of an antiferromagnetic topological insulator Otrokov, M. M.; Klimovskikh, I. I.; Bentmann, H. Nature, Vol. 576, Issue 7787 https://doi.org/10.1038/s41586-019-1840-9	journal	December 2019
Magnetic topological insulators Tokura, Yoshinori; Yasuda, Kenji; Tsukazaki, Atsushi Nature Reviews Physics, Vol. 1, Issue 2 https://doi.org/10.1038/s42254-018-0011-5	journal	January 2019
Crystal structure, properties and nanostructuring of a new layered chalcogenide semiconductor, Bi2MnTe4 Lee, Dong Sun; Kim, Tae-Hoon; Park, Cheol-Hee CrystEngComm, Vol. 15, Issue 27 https://doi.org/10.1039/c3ce40643a	journal	January 2013
Hybrid functionals based on a screened Coulomb potential Heyd, Jochen; Scuseria, Gustavo E.; Ernzerhof, Matthias The Journal of Chemical Physics, Vol. 118, Issue 18 https://doi.org/10.1063/1.1564060	journal	May 2003
A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu Grimme, Stefan; Antony, Jens; Ehrlich, Stephan The Journal of Chemical Physics, Vol. 132, Issue 15 https://doi.org/10.1063/1.3382344	journal	April 2010
Magnetic modulation doping in topological insulators toward higher-temperature quantum anomalous Hall effect Mogi, M.; Yoshimi, R.; Tsukazaki, A. Applied Physics Letters, Vol. 107, Issue 18 https://doi.org/10.1063/1.4935075	journal	November 2015
Imaging Dirac-mass disorder from magnetic dopant atoms in the ferromagnetic topological insulator Cr _x (Bi _0.1 Sb _0.9 ) _2-x Te ₃ Lee, Inhee; Kim, Chung Koo; Lee, Jinho Proceedings of the National Academy of Sciences, Vol. 112, Issue 5 https://doi.org/10.1073/pnas.1424322112	journal	January 2015
Understanding band gaps of solids in generalized Kohn–Sham theory Perdew, John P.; Yang, Weitao; Burke, Kieron Proceedings of the National Academy of Sciences, Vol. 114, Issue 11 https://doi.org/10.1073/pnas.1621352114	journal	March 2017
Experimental Realization of an Intrinsic Magnetic Topological Insulator ^* Gong, Yan; Guo, Jingwen; Li, Jiaheng Chinese Physics Letters, Vol. 36, Issue 7 https://doi.org/10.1088/0256-307X/36/7/076801	journal	June 2019
Highly-ordered wide bandgap materials for quantized anomalous Hall and magnetoelectric effects Otrokov, M. M.; Menshchikova, T. V.; Vergniory, M. G. 2D Materials, Vol. 4, Issue 2 https://doi.org/10.1088/2053-1583/aa6bec	journal	April 2017
Surface states and Rashba-type spin polarization in antiferromagnetic MnBi 2 Te 4 (0001) Vidal, R. C.; Bentmann, H.; Peixoto, T. R. F. Physical Review B, Vol. 100, Issue 12 https://doi.org/10.1103/PhysRevB.100.121104	journal	September 2019
Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study Dudarev, S. L.; Botton, G. A.; Savrasov, S. Y. Physical Review B, Vol. 57, Issue 3, p. 1505-1509 https://doi.org/10.1103/PhysRevB.57.1505	journal	January 1998
Strain-tunable magnetic anisotropy in monolayer CrCl 3 , CrBr 3 , and CrI 3 Webster, Lucas; Yan, Jia-An Physical Review B, Vol. 98, Issue 14 https://doi.org/10.1103/PhysRevB.98.144411	journal	October 2018
Unique Thickness-Dependent Properties of the van der Waals Interlayer Antiferromagnet MnBi 2 Te 4 Films Otrokov, M. M.; Rusinov, I. P.; Blanco-Rey, M. Physical Review Letters, Vol. 122, Issue 10 https://doi.org/10.1103/PhysRevLett.122.107202	journal	March 2019
Topological Axion States in the Magnetic Insulator MnBi 2 Te 4 with the Quantized Magnetoelectric Effect Zhang, Dongqin; Shi, Minji; Zhu, Tongshuai Physical Review Letters, Vol. 122, Issue 20 https://doi.org/10.1103/PhysRevLett.122.206401	journal	May 2019
Generalized Gradient Approximation Made Simple Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868 https://doi.org/10.1103/PhysRevLett.77.3865	journal	October 1996
Topological Insulators in Three Dimensions Fu, Liang; Kane, C. L.; Mele, E. J. Physical Review Letters, Vol. 98, Issue 10, Article No. 106803 https://doi.org/10.1103/PhysRevLett.98.106803	journal	March 2007
Spin scattering and noncollinear spin structure-induced intrinsic anomalous Hall effect in antiferromagnetic topological insulator MnB i 2 T e 4 Lee, Seng Huat; Zhu, Yanglin; Wang, Yu Physical Review Research, Vol. 1, Issue 1 https://doi.org/10.1103/PhysRevResearch.1.012011	journal	August 2019
Colloquium: Topological insulators Hasan, M. Z.; Kane, C. L. Reviews of Modern Physics, Vol. 82, Issue 4, p. 3045-3067 https://doi.org/10.1103/RevModPhys.82.3045	journal	November 2010
Intrinsic magnetic topological insulators in van der Waals layered MnBi ₂ Te ₄ -family materials Li, Jiaheng; Li, Yang; Du, Shiqiao Science Advances, Vol. 5, Issue 6 https://doi.org/10.1126/sciadv.aaw5685	journal	June 2019
Experimental Realization of a Three-Dimensional Topological Insulator, Bi₂Te₃ Chen, Y. L.; Analytis, J. G.; Chu, J.-H. Science, Vol. 325, Issue 5937, p. 178-181 https://doi.org/10.1126/science.1173034	journal	June 2009
Quantized Anomalous Hall Effect in Magnetic Topological Insulators Yu, R.; Zhang, W.; Zhang, H. -J. Science, Vol. 329, Issue 5987 https://doi.org/10.1126/science.1187485	journal	June 2010
Massive Dirac Fermion on the Surface of a Magnetically Doped Topological Insulator Chen, Y. L.; Chu, J. - H.; Analytis, J. G. Science, Vol. 329, Issue 5992 https://doi.org/10.1126/science.1189924	journal	August 2010
Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator Chang, C. -Z.; Zhang, J.; Feng, X. Science, Vol. 340, Issue 6129 https://doi.org/10.1126/science.1234414	journal	March 2013
Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure He, Qing Lin; Pan, Lei; Stern, Alexander L. Science, Vol. 357, Issue 6348 https://doi.org/10.1126/science.aag2792	journal	July 2017
Quantum anomalous Hall effect in intrinsic magnetic topological insulator MnBi ₂ Te ₄ Deng, Yujun; Yu, Yijun; Shi, Meng Zhu Science, Vol. 367, Issue 6480 https://doi.org/10.1126/science.aax8156	journal	January 2020

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Crossover from 2D Ferromagnetic Insulator to Wide Band Gap Quantum Anomalous Hall Insulator in Ultrathin MnBi2Te4

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Crossover from 2D Ferromagnetic Insulator to Wide Band Gap Quantum Anomalous Hall Insulator in Ultrathin MnBi₂Te₄