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Evolution of magnetic field induced ordering in the layered quantum Heisenberg triangular-lattice antiferromagnet Ba3CoSb2O9
Fortune, N. A.1; Huang, Q.2; Hong, T.3; Ma, J.4,5; Choi, E. S.6; Hannahs, S. T.6; Zhao, Z. Y.7; Sun, X. F.8,9,10; Takano, Y.11; Zhou, H. D.2,6
Corresponding AuthorFortune, N. A.(nfortune@smith.edu)
2021-05-24
Source PublicationPHYSICAL REVIEW B
ISSN2469-9950
Volume103Issue:18Pages:10
AbstractQuantum fluctuations in the effective spin-1/2 layered triangular-lattice quantum Heisenberg antiferromagnet Ba3CoSb2O9 lift the classical degeneracy of the antiferromagnetic ground state in magnetic field, producing a series of novel spin structures for magnetic fields applied within the crystallographic ab plane, including a celebrated collinear "up-up-down" spin ordering with magnetization equal to 1/3 of the saturation magnetization over an extended field range. Theoretically unresolved, however, are the effects of interlayer antiferromagnetic coupling and transverse magnetic fields on the ground states of this system. Additional magnetic field induced phase transitions are theoretically expected and in some cases have been experimentally observed, but details regarding their number, location, and physical character appear inconsistent with the predictions of existing models. Conversely, an absence of experimental measurements as a function of magnetic-field orientation has left other key predictions of these models untested. To address these issues, we have used specific heat, neutron diffraction, thermal conductivity, and magnetic torque measurements to map out the phase diagram as a function of magnetic field intensity and orientation relative to the crystallographic ab plane. For H parallel to ab we have discovered an additional magnetic field induced phase transition at low temperature and an unexpected tetracritical point in the high-field phase diagram, which coupled with the apparent second-order nature of the phase transitions eliminates several theoretically proposed spin structures for the high-field phases. Our calorimetric measurements as a function of magnetic field orientation are in general agreement with theory for field-orientation angles close to plane parallel (H parallel to a) but diverge at angles near plane perpendicular; a predicted convergence of two phase boundaries at finite angle and a corresponding change in the order of the field induced phase transition are not observed experimentally. Our results emphasize the role of interlayer coupling in selecting and stabilizing field induced phases, provide guidance on the nature of the magnetic order in each phase, and reveal the need for new physics to account for the nature of magnetic ordering in this archetypal two-dimensional spin-1/2 triangular-lattice quantum Heisenberg antiferromagnet.
Funding OrganizationNational Science Foundation ; NHMFL UCGP ; National Natural Science Foundation of China ; National Basic Research Program of China ; Innovative Program of Hefei Science Center, CAS ; Shanghai talent program ; state of Florida
DOI10.1103/PhysRevB.103.184425
Indexed BySCI
Language英语
Funding ProjectNational Science Foundation[DMR-1644779] ; National Science Foundation[DMR-2003117] ; NHMFL UCGP ; National Natural Science Foundation of China[11774223] ; National Natural Science Foundation of China[U1732154] ; National Natural Science Foundation of China[U2032213] ; National Natural Science Foundation of China[U1832209] ; National Natural Science Foundation of China[11874336] ; National Basic Research Program of China[2016YFA0300501] ; National Basic Research Program of China[2018YFA0704300] ; National Basic Research Program of China[2016YFA0300103] ; Innovative Program of Hefei Science Center, CAS[2019HSC-CIP001] ; Shanghai talent program ; state of Florida
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000655897200002
PublisherAMER PHYSICAL SOC
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/160334
Collection中国科学院金属研究所
Corresponding AuthorFortune, N. A.
Affiliation1.Smith Coll, Dept Phys, Northampton, MA 01063 USA
2.Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
3.Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA
4.Shanghai Jiao Tong Univ, Sch Phys & Astron, Lab Artificial Struct & Quantum Control, Shanghai 200240, Peoples R China
5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
6.Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
7.Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
8.Univ Sci & Technol China, Dept Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
9.Univ Sci & Technol China, Key Lab Strongly Coupled Quantum Matter Phys CAS, Hefei 230026, Anhui, Peoples R China
10.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Anhui, Peoples R China
11.Univ Florida, Dept Phys, Gainesville, FL 32611 USA
Recommended Citation
GB/T 7714
Fortune, N. A.,Huang, Q.,Hong, T.,et al. Evolution of magnetic field induced ordering in the layered quantum Heisenberg triangular-lattice antiferromagnet Ba3CoSb2O9[J]. PHYSICAL REVIEW B,2021,103(18):10.
APA Fortune, N. A..,Huang, Q..,Hong, T..,Ma, J..,Choi, E. S..,...&Zhou, H. D..(2021).Evolution of magnetic field induced ordering in the layered quantum Heisenberg triangular-lattice antiferromagnet Ba3CoSb2O9.PHYSICAL REVIEW B,103(18),10.
MLA Fortune, N. A.,et al."Evolution of magnetic field induced ordering in the layered quantum Heisenberg triangular-lattice antiferromagnet Ba3CoSb2O9".PHYSICAL REVIEW B 103.18(2021):10.
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