Specialized Elective

Solid State Physics Laboratory

CODE
ΣΥΕ402
SEMESTER
8
HOURS per WEEK
3
ECTS CREDITS
4
INSTRUCTORS

George Dimitrakopulos

Konstantinos Efthymiadis

Joseph Kioseoglou

Ioannis Arvanitidis

Maria Katsikini

Dimitrios Tassis

Maria Gioti

Triantafillia Zorba

  • “Reciprocal space and Brillouin zone”: The relation between the diffraction pattern and the reciprocal space and of the diffraction pattern as a Fourier transform. . Reciprocal space and the Brillouin zone for basic lattices: fcc, bcc, hcp, diamond structure, sphalerite, wurtzite.
  • “Electron microscopy”: Modes of operation of the electron microscope and related interactive software. Imaging with an electron microscope (magnification, resolution). Evaluation of the electron diffraction patterns of a mono- and a poly-crystalline material. Polytype identification.
  • “Study of surfaces and surface defects”: Microscopic surface imaging using the NanoEducator Scanning Probe Microscope. Qualitative and quantitative surface characterization of representative samples (e.g. surface roughness).
  • “Ι-V characteristics”. Characterization of p-n rectifying junctions by means of their current-voltage characteristics. Determination, using proper software, of the diode saturation current, ideality factor, series and parallel resistance.
  • “Conductivity measurements and Hall effect”: Characterization techniques of the electric properties of semiconducting materials and devices. Two- and four-contact resistivity measurements (Van der Pauw). Determination of the carrier type and concentration by means of the Hall measurements.
  • “Electronic structure of the solids”: Calculation of the crystal structure and band structure of semiconductors (e.g. Si, GaN) using ab initio methods. Conduction and valence band, Brillouin zone. Calculation of the density of states and Fermi energy. Electronic configuration and bonding.
  • “Absorption and reflectivity”: Electronic transitions and absorption spectroscopy. Determination of the energy gaps of semiconductors from their visible light absorption spectra. Effect of defects and disorder on the energy gap. Determination of the thickness of thin films using the reflectivity curve.
  • “Vibrational properties of matter: Raman spectroscopy”: Molecular vibrations of polymers or other organic materials. Determination of the vibration frequency following proper fitting procedures and substance identification from the Raman spectrum. Phonons in solids: study of the effect of the type of the atoms, the symmetry and crystallinity on the vibrational mode frequency (using the AVARAMAN spectrometer).
  • “Vibrational properties of matter: FTIR spectroscopy”: Vibrational spectroscopy measurement methods, mid/far IR spectroscopy using Fourier transform (FTIR), interferometers, FTIR microspectroscopy. In situ optical characterization. FTIR reflectivity and transmittance spectroscopy and material identification. Characterization of inhomogeneous materials with FTIR microspectroscopy.
  • “Magnetic hysteresis loop”. Classification of magnetic materials (diamagnetic, paramagnetic, ferromagnetic). Acquisition and evaluation of the hysteresis loop of magnetic materials. Effect of temperature of the magnetization and magnetic susceptibility.

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