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TF-μSR Sensitivity to Charge Density Wave Order in 2H-NbSe2

Resource type
Thesis type
(Thesis) M.Sc.
Date created
2016-04-22
Authors/Contributors
Abstract
The sensitivity of transverse-field muon spin rotation (TF-μSR) to static charge-density wave (CDW) order in the bulk of 2H-NbSe2 is demonstrated. In the presence of CDW order, the quadrupolar interaction of the 93Nb nuclei with the local electric-field gradient is modified, and this in turn affects the magnetic dipolar coupling of the positive muon to these nuclei. For a weak magnetic field applied parallel to the c-axis, we observe a small enhancement of the muon depolarization rate at temperatures below the established CDW phase transition. Aligning the applied field perpendicular to the c-axis, we observe a sensitivity to static CDW order in regions of the sample extending up to a temperature nearly 3 times the CDW transition temperature T CDW. The results suggest that the muon is mobile over the temperature range explored above the superconducting transition temperature Tc, but becomes trapped in the vicinity of defects.
Document
Identifier
etd9560
Copyright statement
Copyright is held by the author.
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This thesis may be printed or downloaded for non-commercial research and scholarly purposes.
Scholarly level
Supervisor or Senior Supervisor
Thesis advisor: Sonier, Jeff
Thesis advisor: Broun, David
Member of collection
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etd9560_CGomez.pdf 1.15 MB

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