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Cornell engineers used precisely timed laser pulses to control changeable properties in a quantum material, pioneering a method that may have wide applications across a class of materials with immense...
Forcibly driven coherent soft phonons in GeTe with intense THz-rate pump fields
coherent soft phonons GeTe intense THz-rate pump fields
2010/11/23
We propose an experimental technique to generate large amplitude coherent phonons with irradiation of THz-rate pump pulses and to study the dynamics of phase transition in GeTe ferroelectrics.When a s...
Ultrafast dephasing of coherent optical phonons in atomically controlled GeTe/Sb$_{2}$Te$_{3}$ superlattices
Ultrafast dephasing of coherent optical phonons
2010/11/23
Femtosecond dynamics of coherent optical phonons in GeTe/Sb2Te3 superlattices (SLs), a new
class of semiconductor SLs with three different states, have been investigated by using a reflectiontype pum...
Contribution of interband effects caused by long-wavelength transverse optical phonons to electron-phonon coupling in doped polar insulators
Contribution of interband effects electron-phonon coupling doped polar insulators
2010/11/22
We estimate the contribution of the long-wavelength el–TO–ph interaction and discuss the effect it has on electron pairing in doped polar systems like SrTiO3 and PbTe. The analytical and numerical res...
Ultrafast dephasing of coherent optical phonons in atomically controlled GeTe/Sb$_{2}$Te$_{3}$ superlattices
Ultrafast dephasing coherent optical phonons
2010/11/18
Femtosecond dynamics of coherent optical phonons in GeTe/Sb$_{2}$Te$_{3}$ superlattices (SLs), a new class of semiconductor SLs with three different states, have been investigated by using a reflecti...
Interface and Surface Optical Phonons Spectra in Wurtzite Nitride Quantum Well Wires: Size and Dielectric Effects
Optical Phonon Vibration Spectra Wurtzite QWW
2010/4/9
By employing the method of electrostatic potential expansion, the interface optical (IO) and surface optical (SO) phonon modes and the corresponding Fröhlich-like electron-phonon-interaction Hami...