Conduction electron g-factor in tungsten from quantum oscillations in ultrasonic velocity

From an analysis of the field dependence and harmonic content of quantum oscillations in the velocity of transverse ultrasonic waves associated with the ellipsoidal hole pockets at N in tungsten, the spin-splitting factor g = 1.73 ± 0.07 has been determined for central orbits near that of minimum area, i.e. with magnetic field H along a cubic axis [100]. This is consistent with the observed disappearance of the second harmonic oscillations for field nearly midway between two cubic axes, which implies g = 1.82 ± 0.07 for the relevant orbit.

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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

International Journal of Modern Physics B ◽

10.1142/s0217979202014401 ◽

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).

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Analysis of the spin splitting of maxima of quantum oscillations of the resistivity of n-Bi-Sb semiconductor alloys in a magnetic field parallel to the bisector axis

Physics of the Solid State ◽

10.1134/s1063783413110206 ◽

2013 ◽

Vol 55 (11) ◽

pp. 2223-2228

Author(s):

N. A. Red’ko ◽

V. D. Kagan ◽

M. P. Volkov

Keyword(s):

Magnetic Field ◽

Spin Splitting ◽

Semiconductor Alloys ◽

Quantum Oscillations ◽

Field Parallel

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Ultrasonic quantum oscillations and the magnetic field dependence of the Fermi energy in semimetallic Bi1-xSbxalloys

Journal of Physics F Metal Physics ◽

10.1088/0305-4608/16/7/013 ◽

1986 ◽

Vol 16 (7) ◽

pp. 853-867 ◽

Cited By ~ 18

Author(s):

M Cankurtaran ◽

H Celik ◽

T Alper

Keyword(s):

Magnetic Field ◽

Field Dependence ◽

Fermi Energy ◽

Magnetic Field Dependence ◽

Quantum Oscillations ◽

The Magnetic Field

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High Field Magnetoacoustic Investigation of the Fermi Surface of Tungsten

Canadian Journal of Physics ◽

10.1139/p73-009 ◽

1973 ◽

Vol 51 (1) ◽

pp. 77-86 ◽

Cited By ~ 4

Author(s):

J. P. Kalejs ◽

J. M. Perz

Keyword(s):

Magnetic Field ◽

Fermi Surface ◽

Empirical Model ◽

Cyclotron Resonance ◽

High Field ◽

Ultrasonic Waves ◽

Quantum Oscillations ◽

Resonance Data ◽

The Magnetic Field ◽

Longitudinal Ultrasonic Waves

We have measured the frequencies of quantum oscillations in the attenuation of 20 MHz longitudinal ultrasonic waves in tungsten in magnetic fields up to 109 kOe. Our results agree well with the de Haas–van Alphen (dHvA) data of Girvan, Gold, and Phillips (GGP). In addition, we see features predicted by the empirical model developed by GGP but not observed directly in the dHvA studies. Specifically, we find strong evidence of the continuation of the ω branch (GGP notation) for the magnetic field H in the [Formula: see text] plane right to the [110] direction; we also observe splitting of the ξ branch for field directions near [111], but not to the extent predicted by the model. From the temperature dependence of the amplitudes of the quantum oscillations, we have deduced cyclotron masses for some orbits; these agree well with GGP and cyclotron resonance data.

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