Oscillations of the Electric-Dipole Echo in Glasses in a Magnetic Field

Details Oscillations of the Electric-Dipole Echo in Glasses in a Magnetic Field Oscillations of the Electric-Dipole Echo in Glasses in a Magnetic Field

2004-05-04

arxiv.org/abs/cond-mat/0405058v1

J. Low Temp. Phys. 137(3-4), 231 (2004).

Physics

Condensed Matter

Disordered Systems and Neural Networks

11 pages, 4 figures

Scientific paper

10.1023/B:JOLT.0000049055.25507.

Using a simple diagram technique we derive the electric-dipole echo amplitude from two-level systems with a quadrupole nuclear moment in glasses in an external magnetic field. We show, that due to the quadrupole moment interaction of a tunneling particle with a gradient of an internal electric field, the echo amplitude experiences oscillations in rather weak magnetic fields. With an increase of the magnetic field, when the Zeeman energy becomes larger than the quadrupole energy splitting, the average echo amplitude increases and saturates (for high magnetic fields) at some level which is above the average level of echo oscillations for small magnetic fields.

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