2006/05/29 by O. Gunawan, Oki Gunawan, Y. P. Shkolnikov +5 · 4 citations
Mathematics · Physics and Astronomy · #Biology #Condensed matter physics #Electron #Geometry #Magnetic susceptibility #Mathematics #Physics #Physics of Superconductivity and Magnetism #Population #Quantum and electron transport phenomena #Quantum mechanics #Semiconductor Quantum Structures and Devices #Spin (aerodynamics) #Strain (injury) #Symmetry (geometry) #Symmetry breaking #cond-mat.mes-hall #cond-mat.str-el #quant-ph
paper · pdf · doi:10.1103/physrevlett.97.186404
published as Phys. Rev. Lett. 97, 186 404 (2006). · 5 pages, 2 figures
arxiv created 2006/05/29 · openalex publication_date 2006/11/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report direct measurements of the valley susceptibility, the change of valley population in response to an applied symmetry-breaking strain, in an AlAs two-dimensional electron system. As the two-dimensional density is reduced, the valley susceptibility dramatically increases relative to its band value, reflecting the system's strong electron-electron interaction. The increase has a remarkable resemblance to the enhancement of the spin susceptibility and establishes the analogy between the spin and valley degrees of freedom.