Observation of a strongly nested Fermi surface in the shape-memory alloy Ni[0.62]Al[0.38]

Abstract

The Fermi surface topology of the shape-memory alloy Ni[0.62]Al[0.38] has been determined using Compton scattering. A large area of this Fermi surface can be made to nest with other areas by translation through a vector of ~ 0.18 [1,1,0] (2pi/a), which correponds to the wavevector associated with martensitic precursor phenomena such as phonon softening and diffuse streaking in electron diffraction patterns. This observation is compelling evidence that these phenomena are driven by the enhanced electron-lattice coupling due to the Fermi surface nesting.

Cited by in corpus (6)

• Combined experimental and theoretical investigation of the premartensitic transition in Ni${}_2$MnGa
• Local Atomic Structure of Martensitic Ni${}_{2+x}$Mn${}_{1-x}$Ga: An EXAFS Study
• Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides
• Electronic Instabilities in Shape-Memory Alloys
• Nonlocal spectral properties of disordered alloys
• Composition and temperature dependence of the thermoelectric power of Ni${}_{2+x}$Mn${}_{1-x}$Ga alloys