Wigner crystal of a two-dimensional electron gas with a strong spin-orbit interaction

被引：16

作者：

Silvestrov, P. G. ^{[1
,2
,3
]}

Entin-Wohlman, O. ^{[4
,5
]}

机构：

[1] Free Univ Berlin, Dept Phys, D-14195 Berlin, Germany

[2] Free Univ Berlin, Dahlem Ctr Complex Quantum Syst, D-14195 Berlin, Germany

[3] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math Phys, D-38106 Braunschweig, Germany

[4] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

[5] Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Tel Aviv, Israel

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 15期

关键词：

CRYSTALLIZATION; TRANSITION; STATE;

D O I：

10.1103/PhysRevB.89.155103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

TheWigner-crystal phase of two-dimensional electrons interacting via the Coulomb repulsion and subject to a strong Rashba spin-orbit coupling is investigated. For low enough electronic densities the spin-orbit band splitting can be larger than the zero-point energy of the lattice vibrations. Then the degeneracy of the lower subband results in a spontaneous symmetry breaking of the vibrational ground state. The 60. rotational symmetry of the triangular (spin-orbit coupling free) structure is lost, and the unit cell of the new lattice contains two electrons. Breaking the rotational symmetry also leads to a (slight) squeezing of the underlying triangular lattice.

引用

页数：7

共 16 条

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