Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Publication Type
Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
Driving Piezochromism And Metallicity In Van Der Waals Materials Under Compression, Nathan Harms
Driving Piezochromism And Metallicity In Van Der Waals Materials Under Compression, Nathan Harms
Doctoral Dissertations
Complex chalcogenides provide an important platform to explore the interplay between structure, charge, and spin across pressure-induced phase transitions. Where much of the previous research has been focused on tuning these materials towards the single-layer limit, we instead explore the modification of bond lengths and bond angles under compression. In the first project we revealed piezochromism in MnPS3. We combined high pressure optical spectroscopy and first-principles calculations to analyze the dramatic color change (green → yellow → red → black) that takes place as the charge gap shifts across the visible and into the near infrared region, moving …
Symmetry Progression And Possible Polar Metallicity In Nips3 Under Pressure, Nathan Harms, Takahiro Matsuoka, Subhasis Sanmanta, Amanda J. Clune, Kevin A. Smith, Amanda V. Haglund, Erxi Feng, Huibo Cao, Jesse S. Smith, David Mandrus, Heung-Sik Kim, Zhenxian Liu, Janice L. Musfeldt
Symmetry Progression And Possible Polar Metallicity In Nips3 Under Pressure, Nathan Harms, Takahiro Matsuoka, Subhasis Sanmanta, Amanda J. Clune, Kevin A. Smith, Amanda V. Haglund, Erxi Feng, Huibo Cao, Jesse S. Smith, David Mandrus, Heung-Sik Kim, Zhenxian Liu, Janice L. Musfeldt
Chemistry Publications and Other Works
van der Waals solids are ideal platforms for the discovery of new states of matter and emergent properties under external stimuli. Under pressure, complex chalcogenides like MPS3 (M = Mn, Ni, Co, V) host sliding and structural transitions, insulator-to-metal transitions, the possibility of an orbitally-selective Mott state, piezochromism, and superconductivity. In this work, we bring together diamond anvil cell techniques, infrared and Raman scattering spectroscopies, and X-ray diffraction with a detailed symmetry analysis and first-principles calculations to uncover a series of high-pressure phases in NiPS3. Remarkably, we find five different states of matter between ambient …