Xiaojian Bai

Assistant Professor of Physics

Ph.D., 2014 - Sogang University
Ph.D., 2019 - Georgia Institute of Technology

Louisiana State University
Department of Physics & Astronomy
210-F Nicholson Hall, Tower Dr.
Baton Rouge, LA 70803-4001
225-578-2029-Office
xbai@lsu.edu

Research Interests

Experimental Condensed Matter Physics

My current research focuses on understanding emergent properties of strongly correlated materials using a combination of experimental and theoretical approaches, including in-house single-crystal growth and physical property characterization, high-fidelity theoretical modeling using HPC, and neutron spectroscopy at Oak Ridge National Laboratory and user facilities around the world. Neutron scattering is a powerful experimental tool that can provide quantitative information on static and dynamic correlations between microscopic degrees of freedom. My group uses neutrons to study a broad range of topics such as quantum and classical spin liquids, frustrated magnets, magnetic excitations, multipolar bound-states, multiferroic materials, low-dimensional metal-organic frameworks, Hund's metals, spin density waves, and correlated structural disorders.

Select Publications

X. Bai, S.-S. Zhang, H. Zhang, Z. Dun, W. A. Phelan, V. O. Garlea, M. Mourigal, C. D. Batista, “Instabilities of heavy magnons in an anisotropic magnet”, Nature Communications 14 (1), 4199 (2023). [arXiv:2107.05694]
M. Marshall, B. R. Billingsley, X. Bai, Q. Ma, T. Kong, H. Cao, “Field-induced partial disorder in a Shastry-Sutherland lattice”, Nature Communications 14 (1), 3641 (2023). [arXiv:2208.02795]
X. Bai, F. Lechermann, Y. Liu, Y. Cheng, A. I. Kolesnikov, F. Ye, T. J. Williams, S. Chi, T. Hong, G. E Granroth, A. F May, S. Calder, “Antiferromagnetic fluctuations and orbital-selective Mott transition in the van der Waals ferromagnet Fe3-xGeTe2 ”, Physical Review B 106 (18), L180409 (2022). [arXiv:2201.12375]
D. Dahlbom, H. Zhang, C. Miles, X. Bai, C. D. Batista, K. Barros, “Geometric integration of classical spin dynamics via a mean-field Schrödinger equation”, Physical Review B 106 (5), 054423 (2022). [arXiv:2204.07563]
J. Zhou, G. Quirion, J. A Quilliam, H. Cao, F. Ye, M. B Stone, Q. Huang, H. Zhou, J. Cheng, X. Bai, M. Mourigal, Y. Wan, Z. Dun, “Anticollinear order and degeneracy lifting in square lattice antiferromagnet LaSrCrO4”, Physical Review B 105 (18), L180411 (2022) [arXiv:2203.09049]
A. Legros, S.-S. Zhang, X. Bai, H. Zhang, Z. Dun, W. A. Phelan, C. D. Batista, M. Mourigal, N. P. Armitage, “Observation of 4- and 6-Magnon Bound States in the Spin-Anisotropic Frustrated Antiferromagnet FeI2”, Physical Review Letters 127 (26), 267201 (2021). [arXiv:2012.04205]
L. Ding, X. Xu, H. O. Jeschke, X. Bai, E. Feng, A. S. Alemayehu, J. Kim, F.-T. Huang, Q. Zhang, X. Ding, N. Harrison, V. Zapf, D. Khomskii, I. I. Mazin, S.-W. Cheong, H. Cao, “Field-tunable toroidal moment in a chiral-lattice magnet”, Nature communications 12 (1), 5339, (2021). [arXiv:2103.01360]
Z. Dun, X. Bai, M.B. Stone, H. Zhou, M. Mourigal, “Effective point-charge analysis of crystal fields: Application to rare-earth pyrochlores and tripod kagome magnets”, Physical Review Research 3 (2), 023012 (2021). [arXiv:2004.10957]
X. Bai, S.-S. Zhang, Z. L. Dun, H. Zhang, Q. Huang, H. D. Zhou, M. B. Stone, A. I. Kolesnikov, F. Ye, C. D. Batista, M. Mourigal, “Hybridized quadrupolar excitations in the frustrated and spin-anisotropic magnet FeI2”, Nature Physics 17(4), 467-472 (2021). [arXiv:2004.05623]
X. Bai, R. S. Fishman, G. Sala, D. M. Pajerowski, V. O. Garlea, T. Hong, M. Lee, J. A. Fernandez-Baca, H. Cao, and W. Tian, “Magnetic excitations of the hybrid multiferroic (ND4)2FeCl5D2O”, Physical Review B 103(22), 224411 (2021). [arXiv:2008.06827]
Z. L. Dun, X. Bai, J. A. M. Paddison, E. Hollingworth, N. P. Butch, C. D. Cruz, M. B. Stone, T. Hong, M. Mourigal, H. D. Zhou, “Quantum Versus Classical Spin Fragmentation in Kagome Ice Ho3Mg2Sb3O14”, Physical Review X 10(3), 031069 (2020). [arXiv:1912.11229]
X. Bai, J. A. M. Paddison, E. Kapit, S. M. Koohpayeh, J.-J. Wen, S. E. Dutton, A. T. Savici, A. I. Kolesnikov, G. E. Granroth, C. L. Broholm, J. T. Chalker, and M. Mourigal, “Magnetic Excitations of the Classical Spin Liquid MgCr2O4”, Physical Review Letters 122(9), 097201 (2019). [arXiv:1810.11869]
N. Blanc, J. Trinh, L. Dong, X. Bai, A. A. Aczel, M. Mourigal, L. Balents, T. Siegrist, and A. P. Ramirez, “Quantum criticality among entangled spin chains”, Nature Physics 14(3), 273-276 (2018).
J. A. M. Paddison, H. S. Ong, J. O. Hamp, P. Mukherjee, X. Bai, M. G. Tucker, N. P. Butch, C. Castelnovo, M. Mourigal, and S. E. Dutton, “Emergent order in the kagome Ising magnet Dy3Mg2Sb3O14”, Nature Communications 7(1), 1-8, 13842 (2016). [arXiv:1605.01423]
X. Bai, B.-H. Lee, L. Li, J.-R. Sun, and H.-Q. Zhang, “Time evolution of entanglement entropy in quenched holographic superconductors”, Journal of High Energy Physics 2015(4), 66, (2015). [arXiv:1412.5500]
X. Bai, B.-H. Lee, M. Park, and S. Khimphun, “Dynamical condensation in a holographic superconductor model with anisotropy”, Journal of High Energy Physics 2014(9), 54, (2014). [arXiv:1405.1806]