Title :
Third harmonic generation at the charge transfer gap in Sr/sub 2/CuO/sub 2/Cl/sub 2/
Author :
Carnahan ; Schumacher, A.B. ; Dodge, J.S. ; Kaindl, Robert A. ; Chemla
Author_Institution :
Dept. of Phys., California Univ., Berkeley, CA, USA
Abstract :
Summary form only given. Progress towards understanding high transition-temperature superconductivity in the copper oxides (cuprates) is hindered by the coexistence of complex spin, charge and lattice degrees of freedom. Even in the undoped parent compounds a detailed microscopic description of excitations within the basic energy bandstructure as observed in electron and optical spectroscopies remains a formidable task. Nonlinear optical spectroscopy, however, allows precise control over excitation energies and symmetries, revealing important new information about such systems. Here, we employ third-harmonic generation (THG) spectroscopy to investigate the electronic structure around the charge-transfer gap in the strongly correlated cuprate Sr/sub 2/CuO/sub 2/Cl/sub 2/.
Keywords :
charge exchange; high-speed optical techniques; high-temperature superconductors; optical harmonic generation; strontium compounds; superconducting transition temperature; time resolved spectroscopy; Sr/sub 2/CuO/sub 2/Cl/sub 2/; THG spectroscopy; charge transfer gap; charge-transfer gap; electronic structure; high transition-temperature superconductivity; nonlinear optical spectroscopy; strongly correlated cuprate; third harmonic generation; Charge transfer; Copper; Electron optics; Frequency conversion; Nonlinear optics; Optical harmonic generation; Optical microscopy; Spectroscopy; Strontium; Superconductivity;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2001. QELS '01. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-663-X
DOI :
10.1109/QELS.2001.961787
