Valley susceptibility of an interacting two-dimensional electron system

TY - JOUR

T1 - Valley susceptibility of an interacting two-dimensional electron system

AU - Gunawan, O.

AU - Shkolnikov, Y. P.

AU - Vakili, K.

AU - Gokmen, T.

AU - De Poortere, E. P.

AU - Shayegan, M.

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/33750587841

UR - https://www.scopus.com/pages/publications/33750587841#tab=citedBy

U2 - 10.1103/PhysRevLett.97.186404

DO - 10.1103/PhysRevLett.97.186404

M3 - Article

C2 - 17155564

SN - 0031-9007

VL - 97

JO - Physical review letters

JF - Physical review letters

IS - 18

M1 - 186404

ER -