<i>Electrons at the Fermi Surface</i>

Springford, M; Datars, W. R.

doi:10.1063/1.2914773

Cited by 25 publications

(44 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, interactions with non-magnetic impurities introduced the additional damping term into the LK expression, where r was simply interpreted as collision broadening of the Landau levels, F = h/2r, where F is the Lorentzian half-width of a broadened Landau level (Dingle 1952). Hence a collision time analogous to but different from that used in describing resistivity was introduced into the dHvA amplitude (Springford 1971). The effect of electron-phonon interactions turned out, however, to be more subtle and controversial.…”

Section: Fi(o ~) --Hal(o ~)mentioning

confidence: 99%

See 1 more Smart Citation

The influence of many-body interactions on the de Haas-van Alphen effect

Wasserman

Springford

1996

Advances in Physics

Self Cite

View full text Add to dashboard Cite

Section: Fi(o ~) --Hal(o ~)mentioning

confidence: 99%

“…Because such experiments amount essentially to electron diffraction inside the metal, they yield information on the conduction-electron wavefunctions as well as on the impurities. The interested reader is referred elsewhere for a comprehensive discussion (Springford 1971(Springford , 1980.…”

Section: A Wasserman and M Springfordmentioning

confidence: 99%

The influence of many-body interactions on the de Haas-van Alphen effect

Wasserman

Springford

1996

Advances in Physics

Self Cite

View full text Add to dashboard Cite

“…Microscopically, magnetic anisotropy arises when spin and orbital degrees of freedom are coupled by the spinorbit interaction so that the total energy depends on the spatial orientation of the magnetic moment. According to the "force theorem", 78,79 changes to the total energy, δE, that result from a small perturbation can be related to changes in the sum of the single-particle eigenstates of the Kohn-Sham equations 80 of DFT, δE ∼ δ occ i ε i , which should not be iterated to self consistency. The force theorem has been applied to the calculation of the magnetic anisotropy energy (MAE) where the perturbation is the spin-orbit coupling (SOC) 81 and comparison with explicit total energy calculations yields essentially perfect agreement for Fe, Co and Ni.…”

Section: A Single Ion Anisotropymentioning

confidence: 99%

DFT study of itinerant ferromagnetism in p -doped monolayers of MoS2

2019

View full text Add to dashboard Cite

We use density functional theory to explore the possibility of making the semiconducting transition-metal dichalcogenide MoS2 ferromagnetic by introducing holes into the narrow Mo d band that forms the top of the valence band. In the single impurity limit, the repulsive Coulomb potential of an acceptor atom and intervalley scattering lead to a twofold orbitally degenerate effective-mass like e state being formed from Mo d x 2 −y 2 and dxy states, bound to the K and K valence band maxima. It also leads to a singly degenerate a 1 state with Mo d 3z 2 −r 2 character bound to the slightly lower lying valence band maximum at Γ. Within the accuracy of our calculations, these e and a 1 states are degenerate for MoS2 and accommodate the hole that polarizes fully in the local spin density approximation in the impurity limit. With spin-orbit coupling included, we find a single ion magnetic anisotropy of ∼ 5 meV favouring out-of-plane orientation of the magnetic moment. Pairs of such hole states introduced by V, Nb or Ta doping are found to couple ferromagnetically unless the dopant atoms are too close in which case the magnetic moments are quenched by the formation of spin singlets. Combining these exchange interactions with Monte Carlo calculations allows us to estimate ordering temperatures as a function of x. For x ∼ 9%, Curie temperatures as high as 100K for Nb and Ta and in excess of 160K for V doping are predicted. Factors limiting the ordering temperature are identified and suggestions made to circumvent these limitations. PACS numbers: 75.70.Ak, 73.22.-f, 75.30.Hx, 75.50.Pp FIG. 2. Schematic of the effective mass acceptor states bound to the valence band maxima (VBM): an e state bound to the K-K VBM and an a 1 state to the Γ VBM. n is the principal quantum number and only n = 1, 2, 3 levels of the Rydberg series are sketched at the Γ point.

show abstract

“…He then set about expounding his work and what it had grown to in the hands of followers worldwide; the outcome was the substantial volume Magnetic oscillations in metals (B4), which will long serve as the memorial of a lifetime's pioneering. The Festschrift, Electrons at the Fermi surface (Springford 1980), covers a wider range but contains little that does not owe a great deal to David's example.…”

Section: The Royal Society Mond Laboratorymentioning

confidence: 99%

“…David Khmelmitskii's wide knowledge of physics and Russia has also been very valuable. The frontispiece photograph was taken by John Stewart, commissioned for the publication Electrons at the Fermi surface (edited by M. Springford; Cambridge University Press, 1980) and is reproduced with permission.…”

Section: Acknowledgementsmentioning

confidence: 99%

David Shoenberg. 4 January 1911 — 10 March 2004

Pippard¹

2005

Biogr. Mems Fell. R. Soc.

View full text Add to dashboard Cite

David Shoenberg was the last surviving pioneer of British low-temperature physics, having outlived Nicholas Kurti FRS, who died at the age of 90 in 1988, and J. S. (Jack) Allen, who was nearly 93 when he died in 2001. At the time they began work, before World War II, liquid helium was a rare commodity. In England it was made first in Oxford (1933), with Cambridge following a year later; L. C. Jackson in Bristol could liquefy hydrogen, which was used occasionally to prime a small helium liquefier. Before the outbreak of war halted academic research, all three centres had made significant discoveries in magnetism, superconductivity and superfluidity. P. L. Kapitza's expansion engine regularly supplied liquid helium for Cambridge and, on a few occasions, the other two; it was the forerunner of S. C. Collins's design of commercial liquefier, which, with generous postwar government support for research, made the USA the most prolific performer in low-temperature physics. But the English laboratories built on their prewar distinction and were soon active once more after 1945, with Shoenberg a leading figure. The work he initiated, particularly on the de Haas-van Alphen effect, has continued to spread across the world and into realms of thought he never contemplated in his active years. BIOGRAPHICAL OUTLINE David's father, Isaac Shoenberg, was from Pinsk, a predominantly Jewish city within the Russian Pale. As a highly talented engineer he was permitted to move to St Petersburg, where he designed and set up the first radio stations in Russia. It was there that David was born in December 1910, but his birthday became 4 January 1911 when, after the revolution, the Gregorian calendar was adopted. He was the fourth of five children, survived by his younger sister, the psychiatrist Dr Elizabeth Shoenberg. Happening to visit England for a conference one winter, in about 1912, Isaac was delighted to find it still green, and the people criticizing

show abstract

Electrons at the Fermi Surface

Cited by 25 publications

References 0 publications

The influence of many-body interactions on the de Haas-van Alphen effect

The influence of many-body interactions on the de Haas-van Alphen effect

DFT study of itinerant ferromagnetism in p -doped monolayers of MoS2

David Shoenberg. 4 January 1911 — 10 March 2004

Contact Info

Product

Resources

About