Precision Investigations of the Fermi Surface of Molybdenum

Abstract

The Fermi surface (FS) of molybdenum is investigated with high precision &(0.2 to 0.5%) by means of the radio-frequency size effect (RFSE) on thick samples. The anisotropy of extremal dimensions of all sheets of the FS of molybdenum in the {loo} and { 110) planes is measured.High precision of the measurements allows to separate effectively RFSE lines stipulated by the FS sheets with close dimensions, and to measure reliably the gaps between the tightly situated FS pieces of molybdenum. With the aid of computer calculations the analytical description of the FS is obtained in form of a series in spheric and cubic harmonics. The derivatives aS/ak, for various directions k, are calculated with a computer according to these data.

High-frequency size effect study of the Fermi surface of metals

“…6, the measured sizes of the FS in Ag are in excellent agreement with the data of the dHvA effect [34], which indicates the high accuracy of RFSE method. A similar agreement of the data of the RFSE and dHvA effect was demonstrated for Cu [31].…”

“…As follows from Fig. 9, the position of the RFSE line in the field H 0 determined according to the left-hand edge side agrees well with the cutoff field H 0 of the TFE, in accordance with the frequency dependence of the RFSE extrema in In [30] and with the dependence of the thickness of the sample in Mo [31]. As was shown by V.F.…”

“…From similar measurements using rather thick samples of Cu (d= 3mm) we have shown that the sizes of the FS determined from left-hand edge agree with the data on the dHvA effect with an accuracy of ±0.2%. [29][30][31][32].…”

“…Another example of the successful application of the RFSE for restoring the FSs of metals are studies of the metals of the chromium group (Mo, W) [31,32,[45][46][47][48][49][50][51]. Figure 11 shows the Lomer model of the FS for these metals [42,43].…”

“…The radius of the spheroids is determined by the section e 1 along the [001] axis with a radius vector equal to 0.032 Å -1 . Lines c and b are due to kinks in the orbits of electron jack[31,47,48].…”