Temperature dependence of excitonic energy in isolated Se chains formed in the channels of AlPO4-5 crystals

• Main Authors: Sun, Handong, Tang, Z. K., Zhao, W. M., Wong, G. K.
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2009
• Subjects: DRNTU::Science::Physics::Optics and light
• Online Access: https://hdl.handle.net/10356/101397; http://hdl.handle.net/10220/6137; http://scitation.aip.org.ezlibproxy1.ntu.edu.sg/getabs/servlet/GetabsServlet?prog=normal&id=APPLAB000071000017002457000001
• Institution: Nanyang Technological University

Optical absorption spectra of Se chains formed in channels of AlPO4-5 (AFI) crystals are measured in the temperature range from 80 to 298 K. The excitonic energy of the isolated Se chains is observed to shift to lower energy linearly with increasing temperatures, in sharp contrast to the positive te...