Journal
PHYSICAL REVIEW B
Volume 80, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.144519
Keywords
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Funding
- NSFC [10874230, 10874211, 10804127, 10874046]
- 973 project and Chinese Academy of Sciences
- U.S. DOE-NNSA [DEFC03-03NA00144]
- U.S. DOE-BES
- EU
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Pressure-induced lattice collapse was discovered in tetragonal (T) phase of single crystal Fe1.05Te at room temperature through x-ray and neutron-diffraction measurements. A remarkable compression along the c axis (similar to 5%) was observed upon increasing pressure from the ambient condition to 4 GPa. Indexed results demonstrate that the crystallographic structure remains unchanged after the collapse, revealing that the collapse does not break symmetry of crystal structure. The Fe-spin state change was proposed to account for the lattice collapse. The equations of state for the T phase and pressure-induced collapsed T phase were determined from the diffraction measurements.
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