Publications by authors named "Erick Guzman"
Effects of Boron Doping on the Bulk and Surface Acoustic Phonons in Single-Crystal Diamond.
ACS Appl Mater Interfaces
September 2022
We report the results of the investigation of bulk and surface acoustic phonons in the undoped and boron-doped single-crystal diamond films using the Brillouin-Mandelstam light scattering spectroscopy. The evolution of the optical phonons in the same set of samples was monitored with Raman spectroscopy. It was found that the frequency and the group velocity of acoustic phonons decrease nonmonotonically with the increasing boron doping concentration, revealing pronounced phonon softening.
View Article and Find Full Text PDFProperties for Thermally Conductive Interfaces with Wide Band Gap Materials.
ACS Appl Mater Interfaces
August 2022
Article Synopsis
- The study investigates how the vibrational properties and interfacial structure influence thermal transport in wide band gap semiconductor systems, specifically examining interfaces between nitride metals and various semiconductor materials.
- Time-domain thermoreflectance measurements reveal that conductance varies between materials, showing that while TiN interfaces are highly conductive, vibrational similarity alone doesn't guarantee high thermal conductance.
- The research suggests that double thermal transport is largely influenced by the bulk phonon properties of the softer material and the specific structure of the interface, with interfacial disorder introducing significant thermal resistance.