Zero-energy states in graphene quantum dot with wedge disclination

被引：1

作者：

Bouhlal, Ahmed ^{[1
]}

Jellal, Ahmed ^{[1
,2
]}

Shah, Nurisya Mohd ^{[3
,4
]}

机构：

[1] Chouaib Doukkali Univ, Fac Sci, Lab Theoret Phys, POB 20, El Jadida 24000, Morocco

[2] Canadian Quantum Res Ctr, 204-3002 32 Ave, Vernon, BC V1T 2L7, Canada

[3] Univ Putra Malaysia, Inst Math Res INSPEM, Lab Computat Sci & Math Phys, Upm Serdang 43400, Selangor, Malaysia

[4] Univ Putra Malaysia, Fac Sci, Dept Phys, Upm Serdang 43400, Selangor, Malaysia

来源：

SOLID STATE COMMUNICATIONS | 2023年 / 371卷

关键词：

Graphene; Quantum dot; Electrosatic potential; Magnetic flux; Wedge disclination; Density of states; ROUTE;

D O I：

10.1016/j.ssc.2023.115269

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We show that wedge disclination affects the density of states for fermions that are electrostatically confined in graphene quantum dots. By considering a magnetic flux and solving the Dirac equation, we determine the eigenspinors. These are used for large arguments to derive an approximate scattering matrix, which allows us to get the density of states. Under various conditions, it is found that the density of states exhibits several resonance peaks. In particular, it is shown that the wedge disclination is able to change the amplitude, width, and positions of resonance peaks.

引用

页数：8

共 50 条

[21] Zero-energy Andreev bound states from quantum dots in proximitized Rashba nanowires
Reeg, Christopher
Dmytruk, Olesia
Chevallier, Denis
Loss, Daniel
Klinovaja, Jelena
PHYSICAL REVIEW B, 2018, 98 (24)
[22] Breakdown of Zero-Energy Quantum Hall State in Graphene in the Light of Current Fluctuations and Shot Noise
Antti Laitinen
Manohar Kumar
Teemu Elo
Ying Liu
T. S. Abhilash
Pertti J. Hakonen
Journal of Low Temperature Physics, 2018, 191 : 272 - 287
[23] Breakdown of Zero-Energy Quantum Hall State in Graphene in the Light of Current Fluctuations and Shot Noise
Laitinen, Antti
Kumar, Manohar
Elo, Teemu
Liu, Ying
Abhilash, T. S.
Hakonen, Pertti J.
JOURNAL OF LOW TEMPERATURE PHYSICS, 2018, 191 (5-6) : 272 - 287
[24] Zero-energy flows and vortex patterns in quantum mechanics
Kobayashi, T
PHYSICA SCRIPTA, 2004, 70 (06) : 335 - 342
[25] Phenomenological theory of zero-energy Andreev resonant states
Asano, Y
Tanaka, Y
Kashiwaya, S
PHYSICAL REVIEW B, 2004, 69 (13) : 134501 - 1
[26] Robust zero-energy bound states in a helical lattice
Li, Pengke
Sau, D.
Appelbaum, Ian
PHYSICAL REVIEW B, 2017, 96 (11)
[27] Nature of protected zero-energy states in Penrose quasicrystals
Day-Roberts, Ezra
Fernandes, Rafael M.
Kamenev, Alex
PHYSICAL REVIEW B, 2020, 102 (06)
[28] Zero-energy bound states in a nodal topological lattice
Lee, Soo-Yong
Han, Jung Hoon
PHYSICAL REVIEW B, 2015, 91 (24)
[29] Playing Quantum Physics Jeopardy with zero-energy eigenstates
Gilbert, L. P.
Belloni, M.
Doncheski, M. A.
Robinett, R. W.
AMERICAN JOURNAL OF PHYSICS, 2006, 74 (11) : 1035 - 1036
[30] Zero-energy vortex bound states in noncentrosymmetric superconductors
Lu, Chi-Ken
Yip, Sungkit
PHYSICAL REVIEW B, 2008, 78 (13):

← 1 2 3 4 5 →