Reflectance of rhenium as a function of pressure in a diamond anvil cell

Journal Article · Mon Jan 03 04:00:00 EST 2022 · Applied Physics Letters

DOI:https://doi.org/10.1063/5.0076263· OSTI ID:1979003

Song, Jing ^[1]; Chuvashova, Irina ^[2]; Silvera, Isaac F. ^[2]

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1. Harvard University, Cambridge, MA (United States); Harvard Univ., Cambridge, MA (United States)
2. Harvard University, Cambridge, MA (United States)

We have measured the reflectance of rhenium in the visible region to pressures up to 100 GPa in a diamond anvil cell (DAC). By photographing the reflecting surface, we visually show that there are challenges to obtaining accurate values in a DAC for several reasons, including cupping of the diamonds and roughening of the surface with the increase in pressure. We propose some useful procedures, such as careful alignment of the incident light and using thin gaskets to minimize cupping of the diamonds as well as measurement in the central region of the diamond culet. We also show that knowledge of the reflectance of rhenium can overcome the problem of absorption of light by diamonds when studying the reflectance of materials at high pressure in a DAC.

• Research Organization: Harvard University, Cambridge, MA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
• Grant/Contract Number: NA0003917
• OSTI ID: 1979003
• Alternate ID(s): OSTI ID: 1838062
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 1 Vol. 120; ISSN 0003-6951
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
diamond anvil cells
high pressure instruments
hydrostatics
mechanical instruments
optical properties
phase transitions
signal-to-noise ratio
transition metals