Shubnikov-de Haas Effect in Dilute Bismuth-Antimony Alloys. I. Quantum Oscillations in Low Magnetic Fields

1970 ◽  
Vol 1 (6) ◽  
pp. 2369-2376 ◽  
Author(s):  
H. T. Chu ◽  
Yi-Han Kao
Keyword(s):  
Magnetic Fields ◽  
Quantum Oscillations ◽  
Bismuth Antimony ◽  
Antimony Alloys ◽  
Haas Effect

Cyclotron resonance and quantum oscillations in semimetallic bismuth-antimony alloys with Eg  0

1977 ◽  
Vol 79 (2) ◽  
pp. 501-508 ◽  
Author(s):  
W. Braune ◽  
G. Kuka ◽  
S. Hess ◽  
H.-U. Müller ◽  
T. Jung
Keyword(s):  
Cyclotron Resonance ◽  
Quantum Oscillations ◽  
Bismuth Antimony ◽  
Antimony Alloys

THE STUDY OF THE MAGNETIC BREAKDOWN EFFECT AS A FUNCTION OF ANGLE IN THE ORGANIC CONDUCTOR K- (BEDT-TTF)2Cu(NCS)2 IN HIGH MAGNETIC FIELDS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3355-3359
Author(s):  
I. MIHUT ◽  
C. C. AGOSTA ◽  
C. H. MIELKE ◽  
M. TOKOMOTO
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Spin Splitting ◽  
High Magnetic Fields ◽  
Organic Conductor ◽  
Cross Sectional ◽  
Tank Circuit ◽  
Quantum Oscillations ◽  
Magnetic Breakdown ◽  
Splitting Factor

The magnetic breakdown effect can be seen by the growth of new frequencies in the quantum oscillations in clean metals as a function of magnetic field. We have studied the variation of the amplitudes in the quantum oscillations in the resistance (the Shubnikov-de Haas effect) as a function of angle in the quasi-two dimensional-organic conductor κ-(BEDT-TTF)2Cu(NCS)2. The measurements were made by means of a radio frequency (rf) tank circuit (~ 50 MHz) at very high magnetic fields(50T-60T) and low temperature(500 mK). The geometry of the rf excitation we used excited in-plane currents, and therefore we measured the in-plane resistivity. In contrast to conventional transport measurements that measure the inter-plane resistivity, the in-plane resistivity is dominated by the magnetic breakdown frequencies. As a result we measured much higher breakdown frequency amplitudes than conventional transport experiments. As is expected, the angular dependence of the Shubnikov-de Haas frequencies have a 1/cosθ behavior. This is due to the change of the cross sectional area of the tubular Fermi surface as the angle with respect to the magnetic field is changed. The amplitude of the oscillations changes due to the spin splitting factor which takes into account the ratio between the spin splitting and the energy spacing of the Landau levels which also has 1/cosθ behavior. We show that our data agree with the semi-classical theory (Lifshitz-Kosevich formula).

Unexpected additional damping of magnetic quantum oscillations in layered organic conductors in tilted magnetic fields

2001 ◽  
Vol 294-295 ◽  
pp. 439-441 ◽  
Author(s):  
J.A. Symington ◽  
J. Singleton ◽  
N. Clayton ◽  
J. Schlueter ◽  
M. Kurmoo ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Organic Conductors ◽  
Quantum Oscillations ◽  
Magnetic Quantum Oscillations

scholarly journals Quantum Oscillations and Chiral Anomaly in a Bi0.96Sb0.04 Single Crystal

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Gongqin Xu ◽  
Anne de Visser ◽  
Yingkai Huang ◽  
Xingyu Mao
Keyword(s):  
Electrical Current ◽  
Band Edge ◽  
Chiral Anomaly ◽  
Conduction Band Edge ◽  
Special Significance ◽  
Weak Antilocalization ◽  
Quantum Oscillations ◽  
The Magnetic Field ◽  
Haas Effect ◽  
Topological Term

Bi1-xSbx alloys are of special significance in topological insulator research. Here we focus on the Bi0.96Sb0.04 alloy in which the conduction band edge just touches the valence band edge. Transport measurements show quantum oscillations in the longitudinal (Shubnikov–de Haas effect) and transverse magnetoresistance originating from a spheroidal Fermi surface pocket. Further investigation of the longitudinal magnetoresistance for the magnetic field parallel to the electrical current shows a small nonmonotonic magnetoresistance that is attributed to a competition of weak-antilocalization effects and a topological term related to the chiral anomaly.

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