Impact of Spin-Entropy on the Thermoelectric Properties of a 2D Magnet

被引：1

作者：

Canetta, Alessandra ^{[1
]}

Volosheniuk, Serhii ^{[2
]}

Satheesh, Sayooj ^{[3
]}

Alvarinhas Batista, Jose Pedro ^{[4
]}

Castellano, Alois ^{[4
]}

Conte, Riccardo ^{[2
]}

Chica, Daniel George ^{[5
]}

Watanabe, Kenji ^{[6
]}

Taniguchi, Takashi ^{[7
]}

Roy, Xavier ^{[5
]}

van der Zant, Herre S. J. ^{[2
]}

Burghard, Marko ^{[3
]}

Verstraete, Matthieu Jean ^{[4
,8
]}

Gehring, Pascal ^{[1
]}

机构：

[1] Univ Catholique Louvain UCLouvain, Inst Condensed Matter & Nanosci, B-1348 Louvain La Neuve, Belgium

[2] Delft Univ Technol, Kavli Inst Nanosci, NL-2628CJ Delft, Netherlands

[3] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[4] Univ Liege, Nanomat Q MAT & European Theoret Spect Facil, B-4000 Liege, Belgium

[5] Columbia Univ, Dept Chem, New York, NY 10027 USA

[6] Natl Inst Mat Sci, Res Ctr Elect & Opt Mat, Tsukuba 3050044, Japan

[7] Natl Inst Mat Sci, Res Ctr Mat Nanoarchitecton, Tsukuba 3050044, Japan

[8] Univ Utrecht, Phys Dept, ITP, NL-3508 TA Utrecht, Netherlands

来源：

NANO LETTERS | 2024年 / 24卷 / 22期

基金：

美国国家科学基金会;

关键词：

2D magnetism; CrSBr; thermoelectric; entropy; THERMOPOWER;

D O I：

10.1021/acs.nanolett.4c00809

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Heat-to-charge conversion efficiency of thermoelectric materials is closely linked to the entropy per charge carrier. Thus, magnetic materials are promising building blocks for highly efficient energy harvesters as their carrier entropy is boosted by a spin degree of freedom. In this work, we investigate how this spin-entropy impacts heat-to-charge conversion in the A-type antiferromagnet CrSBr. We perform simultaneous measurements of electrical conductance and thermocurrent while changing magnetic order using the temperature and magnetic field as tuning parameters. We find a strong enhancement of the thermoelectric power factor at around the Neel temperature. We further reveal that the power factor at low temperatures can be increased by up to 600% upon applying a magnetic field. Our results demonstrate that the thermoelectric properties of 2D magnets can be optimized by exploiting the sizable impact of spin-entropy and confirm thermoelectric measurements as a sensitive tool to investigate subtle magnetic phase transitions in low-dimensional magnets.

引用

页码：6513 / 6520

页数：8

共 46 条

[1] A note on the electrochemical nature of the thermoelectric power
Apertet, Y.
Ouerdane, H.
Goupil, C.
Lecoeur, Ph.
[J]. EUROPEAN PHYSICAL JOURNAL PLUS, 2016, 131 (04):
[2] Bauer GEW, 2012, NAT MATER, V11, P391, DOI [10.1038/NMAT3301, 10.1038/nmat3301]
[3] Behnia K, 2015, FUNDAMENTALS OF THERMOELECTRICITY, P1, DOI 10.1093/acprof:oso/9780199697663.001.0001
[4] Probing the Spin Dimensionality in Single-Layer CrSBr Van Der Waals Heterostructures by Magneto-Transport Measurements
Boix-Constant, Carla
Manas-Valero, Samuel
Ruiz, Alberto M.
Rybakov, Andrey
Konieczny, Krzysztof Aleksander
Pillet, Sebastien
Baldovi, Jose J.
Coronado, Eugenio
[J]. ADVANCED MATERIALS, 2022, 34 (41)
[5] ENTROPY OF AN ANTIFERROMAGNET IN A MAGNETIC FIELD
BONNER, JC
FISHER, ME
[J]. PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON, 1962, 80 (514): : 508 - &
[6] Magnetism in two-dimensional van der Waals materials
Burch, Kenneth S.
Mandrus, David
Park, Je-Geun
[J]. NATURE, 2018, 563 (7729) : 47 - 52
[7] Effective Seebeck coefficient for semiconductors
Cai, Jianwei
Mahan, G. D.
[J]. PHYSICAL REVIEW B, 2006, 74 (07):
[8] Deterministic transfer of two-dimensional materials by all-dry viscoelastic stamping
Castellanos-Gomez, Andres
Buscema, Michele
Molenaar, Rianda
Singh, Vibhor
Janssen, Laurens
van der Zant, Herre S. J.
Steele, Gary A.
[J]. 2D MATERIALS, 2014, 1 (01):
[9] THERMOPOWER IN CORRELATED HOPPING REGIME
CHAIKIN, PM
BENI, G
[J]. PHYSICAL REVIEW B, 1976, 13 (02): : 647 - 651
[10] Two-Dimensional Magnets: Forgotten History and Recent Progress towards Spintronic Applications
Cortie, David L.
Causer, Grace L.
Rule, Kirrily C.
Fritzsche, Helmut
Kreuzpaintner, Wolfgang
Klose, Frank
[J]. ADVANCED FUNCTIONAL MATERIALS, 2020, 30 (18)

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