Award Date

5-1-2019

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Physics and Astronomy

First Committee Member

Victor Kwong

Second Committee Member

Oliver Tschauner

Third Committee Member

Ashkan Salamat

Number of Pages

77

Abstract

We show that monoclinic Bi-II* forms during a dynamic compression regime with crystal growth rates from melt of ≈ 70 m/s. This extreme quench rate implies crystallization by non-diffusive processes and indicates that the liquid had a high degree of pre-ordering. Using ambient condition single crystal structure analysis we show for the first time that the monoclinic distorted phase of Bi (Bi-II) exists at ambient pressure, albeit bound to formation under dynamic compression. We review the pressure, temperature, and time conditions for formation and growth of this structure.

Keywords

Bismuth; Dynamic compression; Shockwave; Single crystal

Disciplines

Condensed Matter Physics

Language

English

Available for download on Friday, May 15, 2020


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