Metallic state in a strongly interacting spinless two-valley electron system in two dimensions

被引：10

作者：

Melnikov, M. Yu ^{[1
]}

Shashkin, A. A. ^{[1
]}

Dolgopolov, V. T. ^{[1
]}

Huang, S-H ^{[2
,3
,4
]}

Liu, C. W. ^{[2
,3
,4
]}

Zhu, Amy Y. X. ^{[5
]}

Kravchenko, S., V ^{[5
]}

机构：

[1] Inst Solid State Phys, Chernogolovka 142432, Moscow District, Russia

[2] Natl Taiwan Univ, Dept Elect Engn, Taipei 106, Taiwan

[3] Natl Taiwan Univ, Grad Inst Elect Engn, Taipei 106, Taiwan

[4] Natl Nano Device Labs, Hsinchu 300, Taiwan

[5] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 04期

基金：

美国国家科学基金会;

关键词：

SI INVERSION-LAYERS; INSULATOR-TRANSITION; PHASE-DIAGRAM; HALL; CONDUCTIVITY; COLLOQUIUM; TRANSPORT;

D O I：

10.1103/PhysRevB.101.045302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the strongly interacting, two-valley two-dimensional (2D) electron system in ultrahigh mobility SiGe/Si/SiGe quantum wells in parallel magnetic fields strong enough to completely polarize the electron spins thus making the electron system "spinless." It occurs that the metallic temperature dependence of the resistivity, although weaker than that in the absence of magnetic field, still remains strong even when the spin degree of freedom is removed. Several independent methods have been used to establish the existence of the genuine MIT in the spinless two-valley 2D system. This is in contrast to the previous results obtained on more disordered silicon samples, where the polarizing magnetic field causes a complete quench of the metallic temperature behavior.

引用

页数：5

共 49 条

[1] Colloquium:: Metallic behavior and related phenomena in two dimensions [J].

Abrahams, E ;

Kravchenko, SV ;

Sarachik, MP .

REVIEWS OF MODERN PHYSICS, 2001, 73 (02) :251-266

[2] CONDENSED-MATTER PHYSICS Polarized light boosts valleytronics [J].

Behnia, Kamran .

NATURE NANOTECHNOLOGY, 2012, 7 (08) :488-489

[3] Transport evidence for a sliding two-dimensional quantum electron solid [J].

Brussarski, Pedro ;

Li, S. ;

Kravchenko, S. V. ;

Shashkin, A. A. ;

Sarachik, M. P. .

NATURE COMMUNICATIONS, 2018, 9

[4] Coulomb correlations and the Wigner-Mott transition [J].

Camjayi, A. ;

Haule, K. ;

Dobrosavljevic, V. ;

Kotliar, G. .

NATURE PHYSICS, 2008, 4 (12) :932-935

[5] Two-dimensional metal-insulator transition as a potential fluctuation driven semiclassical transport phenomenon [J].

Das Sarma, S. ;

Hwang, E. H. ;

Li, Qiuzi .

PHYSICAL REVIEW B, 2013, 88 (15)

[6] MAGNETIC-FIELD INDUCED TRANSITIONS BETWEEN QUANTIZED HALL AND INSULATOR STATES IN A DILUTE 2D ELECTRON-GAS [J].

DIORIO, M ;

PUDALOV, VM ;

SEMENCHINSKY, SG .

PHYSICS LETTERS A, 1990, 150 (8-9) :422-426

[7] Spin polarization and exchange-correlation effects in transport properties of two-dimensional electron systems in silicon [J].

Dolgopolov, V. T. ;

Shashkin, A. A. ;

Kravchenko, S. V. .

PHYSICAL REVIEW B, 2017, 96 (07)

[8] METAL-INSULATOR-TRANSITION IN SI INVERSION-LAYERS IN THE EXTREME QUANTUM LIMIT [J].

DOLGOPOLOV, VT ;

KRAVCHENKO, GV ;

SHASHKIN, AA ;

KRAVCHENKO, SV .

PHYSICAL REVIEW B, 1992, 46 (20) :13303-13308

[9]

DOLGOPOLOV VT, 1992, JETP LETT+, V55, P733

[10] Effects of a parallel magnetic field on the metal-insulator transition in a dilute two-dimensional electron system [J].

Eng, K ;

Feng, XG ;

Popovic, D ;

Washburn, S .

PHYSICAL REVIEW LETTERS, 2002, 88 (13) :4

← 1 2 3 4 5 →