The Electronic Structure and Secondary Pyroelectric Properties of Lithium Tetraborate

Volodymyr T Adamiv; Yaroslav V Burak; David J Wooten; John McClory; James Petrosky; Ihor Ketsman; Jie Xiao; Yaroslav B Losovyj; Peter A Dowben

doi:10.3390/ma3094550

The Electronic Structure and Secondary Pyroelectric Properties of Lithium Tetraborate

Materials (Basel). 2010 Sep 1;3(9):4550-4579. doi: 10.3390/ma3094550.

Authors

Volodymyr T Adamiv¹, Yaroslav V Burak², David J Wooten³, John McClory⁴, James Petrosky⁵, Ihor Ketsman⁶, Jie Xiao⁷, Yaroslav B Losovyj^{8

9}, Peter A Dowben¹⁰

Affiliations

¹ Institute of Physical Optics, 23 Dragomanov Street, Lviv 79005, Ukraine. adamiv@ifo.lviv.ua.
² Institute of Physical Optics, 23 Dragomanov Street, Lviv 79005, Ukraine. burak@ifo.lviv.ua.
³ Air Force Institute of Technology, 2950 Hobson Way, Wright Patterson Air Force Base, OH 45433-7765, USA. tdjwooten@gmail.com.
⁴ Air Force Institute of Technology, 2950 Hobson Way, Wright Patterson Air Force Base, OH 45433-7765, USA. john.mcclory@afit.edu.
⁵ Air Force Institute of Technology, 2950 Hobson Way, Wright Patterson Air Force Base, OH 45433-7765, USA. james.petrosky@afit.edu.
⁶ Deptment of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, Theodore Jorgensen Hall, 855 North 16th Street, University of Nebraska-Lincoln, Lincoln, NE 68588-0299 , USA. iketsman@unlserve.unl.edu.
⁷ Deptment of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, Theodore Jorgensen Hall, 855 North 16th Street, University of Nebraska-Lincoln, Lincoln, NE 68588-0299 , USA. jie.xiao@chemie.uni-erlangen.de.
⁸ Deptment of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, Theodore Jorgensen Hall, 855 North 16th Street, University of Nebraska-Lincoln, Lincoln, NE 68588-0299 , USA. ylosovyj@lsu.edu.
⁹ J. Bennett Johnston Sr. Center for Advanced Microstructures and Devices, Louisiana State University, 6980 Jefferson Highway, Baton Rouge, LA 70806, USA. ylosovyj@lsu.edu.
¹⁰ Deptment of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, Theodore Jorgensen Hall, 855 North 16th Street, University of Nebraska-Lincoln, Lincoln, NE 68588-0299 , USA. pdowben@unl.edu.

Abstract

We review the pyroelectric properties and electronic structure of Li₂B₄O₇(110) and Li₂B₄O₇(100) surfaces. There is evidence for a pyroelectric current along the [110] direction of stoichiometric Li₂B₄O₇ so that the pyroelectric coefficient is nonzero but roughly 10³ smaller than along the [001] direction of spontaneous polarization. Abrupt decreases in the pyroelectric coefficient along the [110] direction can be correlated with anomalies in the elastic stiffness contributing to the concept that the pyroelectric coefficient is not simply a vector but has qualities of a tensor, as expected. The time dependent surface photovoltaic charging suggests that surface charging is dependent on crystal orientation and doping, as well as temperature.

Keywords: band structure of insulators; lithium tetraborate; oxide pyroelectric; secondary pyroelectric effects; surface states.

Publication types

Review