Angle-dependent magnetoresistance oscillations and magnetic breakdown in

✍ Scribed by K. Uchida; T. Konoike; T. Osada

• Book ID: 104081573
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 400 KB
• Volume: 405
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2010.02.031

✦ Synopsis

We present results of stereographic measurements of interlayer magnetoresistance in the quasi-twodimensional (Q2D) organic conductor, a-ðBEDT-TTFÞ 2 KHgðSCNÞ 4 , at around charge density wave (CDW) transition temperature T c $ 8 K. At 2 K in the CDW phase, there exists the anomalous Lebed resonance pattern, the amplitude of which is modulated by Danner-Chaikin oscillations in case of applied magnetic field close to the Q2D conducting plane. On the contrary, at 7 K just below T c , we have found that the Kajita oscillation of the cylindrical Fermi surfaces appears superposed on the anomalous Lebed resonance. A quantum model of interlayer tunneling demonstrates these behaviors qualitatively. These results suggest that magnetic breakdown plays a key role in anomalous angle-dependent magnetoresistance oscillations.