Have mysterious topological valley currents been observed in graphene superlattices?

被引：10

作者：

Roche, Stephan ^{[1
,2
,3
]}

Power, Stephen R. ^{[4
,5
]}

Nikolic, Branislav K. ^{[6
]}

Hugo Garcia, Jose ^{[1
,2
]}

Jauho, Antti-Pekka ^{[7
]}

机构：

[1] CSIC, Catalan Inst Nanosci & Nanotechnol, Barcelona 08193, Cerdanyola Del, Spain

[2] Barcelona Inst Sci & Technol, Campus UAB, Barcelona 08193, Cerdanyola Del, Spain

[3] Inst Catalana Recerca & Estudis Avancats, Barcelona 08070, Spain

[4] Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland

[5] Dublin City Univ, Sch Phys Sci, Dublin 9, Ireland

[6] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[7] Tech Univ Denmark, DTU Phys, Ctr Nanostruct Graphene, DK-2800 Lyngby, Denmark

来源：

JOURNAL OF PHYSICS-MATERIALS | 2022年 / 5卷 / 02期

基金：

美国国家科学基金会; 新加坡国家研究基金会;

关键词：

graphene; topological valley currents; graphene superlattices; nonlocal resistance;

D O I：

10.1088/2515-7639/ac452a

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We provide a critical discussion concerning the claim of topological valley currents, driven by a global Berry curvature and valley Hall effect proposed in recent literature. After pointing out a major inconsistency of the theoretical scenario proposed to interpret giant nonlocal resistance, we discuss various possible alternative explanations and open directions of research to solve the mystery of nonlocal transport in graphene superlattices.

引用

页数：4

共 14 条

[1] Topological valley currents in bilayer graphene/hexagonal boron nitride superlattices
Endo, Kosuke
Komatsu, Katsuyoshi
Iwasaki, Takuya
Watanabe, Eiichiro
Tsuya, Daiju
Watanabe, Kenji
Taniguchi, Takashi
Noguchi, Yutaka
Wakayama, Yutaka
Morita, Yoshifumi
Moriyama, Satoshi
APPLIED PHYSICS LETTERS, 2019, 114 (24)
[2] Topological Bloch bands in graphene superlattices
Song, Justin C. W.
Samutpraphoot, Polnop
Levitov, Leonid S.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2015, 112 (35) : 10879 - 10883
[3] Detection of valley currents in graphene nanoribbons
Chan, K. S.
PHYSICS LETTERS A, 2018, 382 (07) : 534 - 539
[4] Correlation-induced valley topology in buckled graphene superlattices
Manesco, Antonio L. R.
Lado, Jose L.
2D MATERIALS, 2021, 8 (03)
[5] Topological network and valley beam splitter in acoustic biaxially strained moire superlattices
Zheng, Shengjie
Zhang, Jie
Duan, Guiju
Jiang, Zihan
Man, Xianfeng
Yu, Dejie
Xia, Baizhan
PHYSICAL REVIEW B, 2022, 105 (18)
[6] Deciphering the origin of nonlocal resistance in multiterminal graphene on hexagonal-boron-nitride with ab initio quantum transport: Fermi surface edge currents rather than Fermi sea topological valley currents
Marmolejo-Tejada, J. M.
Garcia, J. H.
Petrovic, M. D.
Chang, P-H
Sheng, X-L
Cresti, A.
Plechac, P.
Roche, S.
Nikolic, B. K.
JOURNAL OF PHYSICS-MATERIALS, 2018, 1 (01):
[7] Light-induced valley currents and magnetization in graphene rings
Moskalenko, A. S.
Berakdar, J.
PHYSICAL REVIEW B, 2009, 80 (19):
[8] Correlated and topological physics in ABC-trilayer graphene moiré superlattices
Guorui Chen
Quantum Frontiers, 1 (1):
[9] Giant and Controllable Valley Currents in Graphene by Double Pumped THz Light
Sharma, Sangeeta
Gill, Deepika
Shallcross, Samuel
NANO LETTERS, 2023, 23 (22) : 10305 - 10310
[10] Controllable valley filter in graphene topological line defect with magnetic field
Ren, C. D.
Lu, W. T.
Zhou, B. H.
Li, Y. F.
Li, D. Y.
Wang, S. K.
Tian, H. Y.
JOURNAL OF PHYSICS-CONDENSED MATTER, 2020, 32 (36)

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