دورية أكاديمية
Structural distortion-induced magnetoelastic locking in Sr(2)IrO(4) revealed through nonlinear optical harmonic generation.
| العنوان: | Structural distortion-induced magnetoelastic locking in Sr(2)IrO(4) revealed through nonlinear optical harmonic generation. |
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| المؤلفون: | Torchinsky DH; Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, California 91125, USA.; Department of Physics, California Institute of Technology, Pasadena, California 91125, USA., Chu H; Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, California 91125, USA.; Department of Applied Physics, California Institute of Technology, Pasadena, California 91125, USA., Zhao L; Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, California 91125, USA.; Department of Physics, California Institute of Technology, Pasadena, California 91125, USA., Perkins NB; School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55116, USA., Sizyuk Y; School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55116, USA., Qi T; Center for Advanced Materials, Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA., Cao G; Center for Advanced Materials, Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA., Hsieh D; Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, California 91125, USA.; Department of Physics, California Institute of Technology, Pasadena, California 91125, USA. |
| المصدر: | Physical review letters [Phys Rev Lett] 2015 Mar 06; Vol. 114 (9), pp. 096404. Date of Electronic Publication: 2015 Mar 05. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Physical Society Country of Publication: United States NLM ID: 0401141 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1079-7114 (Electronic) Linking ISSN: 00319007 NLM ISO Abbreviation: Phys Rev Lett Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: | Original Publication: New York : American Physical Society |
| مستخلص: | We report a global structural distortion in Sr_{2}IrO_{4} using spatially resolved optical second and third harmonic generation rotational anisotropy measurements. A symmetry lowering from an I4_{1}/acd to I4_{1}/a space group is observed both above and below the Néel temperature that arises from a staggered tetragonal distortion of the oxygen octahedra. By studying an effective superexchange Hamiltonian that accounts for this lowered symmetry, we find that perfect locking between the octahedral rotation and magnetic moment canting angles can persist even in the presence of large noncubic local distortions. Our results explain the origin of the forbidden Bragg peaks recently observed in neutron diffraction experiments and reconcile the observations of strong tetragonal distortion and perfect magnetoelastic locking in Sr_{2}IrO_{4}. |
| تواريخ الأحداث: | Date Created: 20150321 Date Completed: 20150514 Latest Revision: 20150321 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1103/PhysRevLett.114.096404 |
| PMID: | 25793834 |
| قاعدة البيانات: | MEDLINE |
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