تقرير
Domain Control by Adjusting Anisotropic Stress in Pyrochlore Oxide Cd2Re2O7
| العنوان: | Domain Control by Adjusting Anisotropic Stress in Pyrochlore Oxide Cd2Re2O7 |
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| المؤلفون: | Tajima, Satoshi, Hirai, Daigorou, Kinoshita, Yuto, Tokunaga, Masashi, Akiba, Kazuto, Kobayashi, Tatsuo C., Hirose, Hishiro T., Hiroi, Zenji |
| المصدر: | J. Phys. Soc. Jpn., Vol.89, No.11, Article ID: 114711 (2020) |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | The 5d pyrochlore oxide Cd2Re2O7 exhibits successive phase transitions from a cubic pyrochlore structure (phase I) to a tetragonal structure without inversion symmetry below Ts1 of ~200 K (phase II) and further to another noncentrosymmetric tetragonal structure below Ts2 of ~120 K (phase III). The two low-temperature phases may be characterized by odd-parity multipolar orders induced by the Fermi liquid instability of the spin-orbit-coupled metal. To control the tetragonal domains generated by the transitions and to obtain a single-domain crystal for the measurements of anisotropic properties, we prepared single crystals with the (0 0 1) surface and applied biaxial and uniaxial stresses along the plane. Polarizing optical microscopy observations revealed that inducing a small strain of approximately 0.05% could flip the twin domains ferroelastically in a reversible fashion at low temperatures, which evidences that the tetragonal deformation switches at Ts2 between c > a for phase II and c < a for phase III. Resistivity measurements using single-domain crystals under uniaxial stress showed that the anisotropy was maximum at around Ts2 and turned over across Ts2: resistivity along the c axis is larger (smaller) than that along the a axis by ~25% for phase II (III) at around Ts2. These large anisotropies probably originate from spin-dependent scattering in the spin-split Fermi surfaces of the cluster electric toroidal quadrupolar phases of Cd2Re2O7. Comment: 16 pages, 13 figures, J. Phys. Soc. Jpn in press |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.7566/JPSJ.89.114711 |
| URL الوصول: | http://arxiv.org/abs/2009.14443 |
| رقم الأكسشن: | edsarx.2009.14443 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.7566/JPSJ.89.114711 |
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