Molecular phases in coupled quantum dots

被引：58

作者：

Rontani, M ^{[1
]}

Amaha, S

Muraki, K

Manghi, F

Molinari, E

Tarucha, S

Austing, DG

机构：

[1] Univ Modena & Reggio Emilia, INFM S3, Modena, Italy

[2] Univ Modena & Reggio Emilia, Dipartimento Fis, Modena, Italy

[3] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 113, Japan

[4] NTT Corp, NTT Basic Res Labs, Kanagawa, Japan

[5] ERATO Mesoscop Correlat Project, Tokyo, Japan

[6] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON, Canada

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.69.085327

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present excitation energy spectra of few-electron vertically coupled quantum dots for strong and intermediate interdot coupling. By applying a magnetic field, we induce ground state transitions and identify the corresponding quantum numbers by comparison with few-body calculations. In addition to atomiclike states, we find novel "molecularlike" phases. The isospin index characterizes the nature of the bond of the artificial molecule and this we control. Like spin in a single quantum dot, transitions in isospin leading to full polarization are observed with increasing magnetic field.

引用

页数：7

共 30 条

[1] Magnetic field induced transitions in the few-electron ground states of artificial molecules [J].