Fractional form of "0.7 anomaly" in 1D hole systems

Marcelo Rosenau Da Costa; Ivan A. Shelykh; Nikolay T. Bagraev

doi:10.1016/j.physe.2007.09.111

Fractional form of "0.7 anomaly" in 1D hole systems

Marcelo Rosenau Da Costa, Ivan A. Shelykh, Nikolay T. Bagraev

Faculty of Physical Sciences

University of Iceland

Research output: Contribution to journal › Article › peer-review

Abstract

We analyze the fractional quantization of the ballistic conductance associated with the light and heavy holes bands in silicon quantum wires. It is shown that the formation of the localized hole state in the region of the quantum point contact connecting two quasi-1D hole leads modifies drastically the conductance pattern. Exchange interaction between localized and propagating holes results in the fractional quantization of the ballistic conductance different from those in electron systems. The value of the conductance at the additional plateaux depends on the offset between the bands of the light and heavy holes, Δ, and the sign of the exchange interaction constant.

Original language	English
Pages (from-to)	1042-1043
Number of pages	2
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	40
Issue number	5
DOIs	https://doi.org/10.1016/j.physe.2007.09.111
Publication status	Published - Mar 2008

Bibliographical note

Funding Information: M.R.C. acknowledge the FINEP and MCT for the financial support. I.A.S. and N.T.B. acknowledge the support of the grants of the President of Russian Federation and SNSF, Grant IB7320-110970/1.

Other keywords

0.7 anomaly
Fractional conductance
Holes
Quantum point contact

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10.1016/j.physe.2007.09.111

Cite this

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title = "Fractional form of {"}0.7 anomaly{"} in 1D hole systems",

abstract = "We analyze the fractional quantization of the ballistic conductance associated with the light and heavy holes bands in silicon quantum wires. It is shown that the formation of the localized hole state in the region of the quantum point contact connecting two quasi-1D hole leads modifies drastically the conductance pattern. Exchange interaction between localized and propagating holes results in the fractional quantization of the ballistic conductance different from those in electron systems. The value of the conductance at the additional plateaux depends on the offset between the bands of the light and heavy holes, Δ, and the sign of the exchange interaction constant.",

keywords = "0.7 anomaly, Fractional conductance, Holes, Quantum point contact",

author = "\{Da Costa\}, \{Marcelo Rosenau\} and Shelykh, \{Ivan A.\} and Bagraev, \{Nikolay T.\}",

note = "Funding Information: M.R.C. acknowledge the FINEP and MCT for the financial support. I.A.S. and N.T.B. acknowledge the support of the grants of the President of Russian Federation and SNSF, Grant IB7320-110970/1.",

year = "2008",

month = mar,

doi = "10.1016/j.physe.2007.09.111",

language = "English",

volume = "40",

pages = "1042--1043",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

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T1 - Fractional form of "0.7 anomaly" in 1D hole systems

AU - Da Costa, Marcelo Rosenau

AU - Shelykh, Ivan A.

AU - Bagraev, Nikolay T.

N1 - Funding Information: M.R.C. acknowledge the FINEP and MCT for the financial support. I.A.S. and N.T.B. acknowledge the support of the grants of the President of Russian Federation and SNSF, Grant IB7320-110970/1.

PY - 2008/3

Y1 - 2008/3

N2 - We analyze the fractional quantization of the ballistic conductance associated with the light and heavy holes bands in silicon quantum wires. It is shown that the formation of the localized hole state in the region of the quantum point contact connecting two quasi-1D hole leads modifies drastically the conductance pattern. Exchange interaction between localized and propagating holes results in the fractional quantization of the ballistic conductance different from those in electron systems. The value of the conductance at the additional plateaux depends on the offset between the bands of the light and heavy holes, Δ, and the sign of the exchange interaction constant.

AB - We analyze the fractional quantization of the ballistic conductance associated with the light and heavy holes bands in silicon quantum wires. It is shown that the formation of the localized hole state in the region of the quantum point contact connecting two quasi-1D hole leads modifies drastically the conductance pattern. Exchange interaction between localized and propagating holes results in the fractional quantization of the ballistic conductance different from those in electron systems. The value of the conductance at the additional plateaux depends on the offset between the bands of the light and heavy holes, Δ, and the sign of the exchange interaction constant.

KW - 0.7 anomaly

KW - Fractional conductance

KW - Holes

KW - Quantum point contact

UR - https://www.scopus.com/pages/publications/39649121680

U2 - 10.1016/j.physe.2007.09.111

DO - 10.1016/j.physe.2007.09.111

M3 - Article

SN - 1386-9477

VL - 40

SP - 1042

EP - 1043

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 5

ER -

Fractional form of "0.7 anomaly" in 1D hole systems

Abstract

Bibliographical note

Other keywords

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