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

Date created: 
2016-04-22
Identifier: 
etd9560
Keywords: 
Charge density wave
TF-μSR
EFG
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 type: 
Thesis
Rights: 
This thesis may be printed or downloaded for non-commercial research and scholarly purposes. Copyright remains with the author.
File(s): 
Supervisor(s): 
Jeff Sonier
David Broun
Department: 
Science: Department of Physics
Thesis type: 
(Thesis) M.Sc.
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