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Conductance anomaly near the Lifshitz transition in strained bilayer graphene

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Conductance anomaly near the Lifshitz transition in strained bilayer graphene. / Gradinar, Diana; Schomerus, Henning; Falko, Vladimir.
In: Physical review B, Vol. 85, No. 16, 165429, 16.04.2012.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Gradinar, D, Schomerus, H & Falko, V 2012, 'Conductance anomaly near the Lifshitz transition in strained bilayer graphene', Physical review B, vol. 85, no. 16, 165429. https://doi.org/10.1103/PhysRevB.85.165429

APA

Gradinar, D., Schomerus, H., & Falko, V. (2012). Conductance anomaly near the Lifshitz transition in strained bilayer graphene. Physical review B, 85(16), Article 165429. https://doi.org/10.1103/PhysRevB.85.165429

Vancouver

Gradinar D, Schomerus H, Falko V. Conductance anomaly near the Lifshitz transition in strained bilayer graphene. Physical review B. 2012 Apr 16;85(16):165429. doi: 10.1103/PhysRevB.85.165429

Author

Gradinar, Diana ; Schomerus, Henning ; Falko, Vladimir. / Conductance anomaly near the Lifshitz transition in strained bilayer graphene. In: Physical review B. 2012 ; Vol. 85, No. 16.

Bibtex

@article{6f36c2823a104af9a32951a75229defa,
title = "Conductance anomaly near the Lifshitz transition in strained bilayer graphene",
abstract = "Strain qualitatively changes the low-energy band structure of bilayer graphene, leading to the appearance of a pair of low-energy Dirac cones near each corner of the Brillouin zone, and a Lifshitz transition (a saddle point in the dispersion relation) at an energy proportional to the strain [ Mucha-Kruczynski, Aleiner and Fal'ko Phys. Rev. B 84 041404 (2011)]. Here, we show that in the vicinity of the Lifshitz transition, the conductance of a ballistic n-p and n-p-n junction exhibits an anomaly: a nonmonotonic temperature and chemical potential dependence, with the size depending on the crystallographic orientation of the principal axis of the strain tensor. This effect is characteristic for junctions between regions of different polarity (n-p and n-p-n junctions), while there is no anomaly in junctions between regions of the same polarity (n-n′ and n-n′-n junctions).",
author = "Diana Gradinar and Henning Schomerus and Vladimir Falko",
note = "{\textcopyright}2012 American Physical Society",
year = "2012",
month = apr,
day = "16",
doi = "10.1103/PhysRevB.85.165429",
language = "English",
volume = "85",
journal = "Physical review B",
issn = "1550-235X",
publisher = "AMER PHYSICAL SOC",
number = "16",

}

RIS

TY - JOUR

T1 - Conductance anomaly near the Lifshitz transition in strained bilayer graphene

AU - Gradinar, Diana

AU - Schomerus, Henning

AU - Falko, Vladimir

N1 - ©2012 American Physical Society

PY - 2012/4/16

Y1 - 2012/4/16

N2 - Strain qualitatively changes the low-energy band structure of bilayer graphene, leading to the appearance of a pair of low-energy Dirac cones near each corner of the Brillouin zone, and a Lifshitz transition (a saddle point in the dispersion relation) at an energy proportional to the strain [ Mucha-Kruczynski, Aleiner and Fal'ko Phys. Rev. B 84 041404 (2011)]. Here, we show that in the vicinity of the Lifshitz transition, the conductance of a ballistic n-p and n-p-n junction exhibits an anomaly: a nonmonotonic temperature and chemical potential dependence, with the size depending on the crystallographic orientation of the principal axis of the strain tensor. This effect is characteristic for junctions between regions of different polarity (n-p and n-p-n junctions), while there is no anomaly in junctions between regions of the same polarity (n-n′ and n-n′-n junctions).

AB - Strain qualitatively changes the low-energy band structure of bilayer graphene, leading to the appearance of a pair of low-energy Dirac cones near each corner of the Brillouin zone, and a Lifshitz transition (a saddle point in the dispersion relation) at an energy proportional to the strain [ Mucha-Kruczynski, Aleiner and Fal'ko Phys. Rev. B 84 041404 (2011)]. Here, we show that in the vicinity of the Lifshitz transition, the conductance of a ballistic n-p and n-p-n junction exhibits an anomaly: a nonmonotonic temperature and chemical potential dependence, with the size depending on the crystallographic orientation of the principal axis of the strain tensor. This effect is characteristic for junctions between regions of different polarity (n-p and n-p-n junctions), while there is no anomaly in junctions between regions of the same polarity (n-n′ and n-n′-n junctions).

U2 - 10.1103/PhysRevB.85.165429

DO - 10.1103/PhysRevB.85.165429

M3 - Journal article

VL - 85

JO - Physical review B

JF - Physical review B

SN - 1550-235X

IS - 16

M1 - 165429

ER -