The Bulk van der Waals Layered Magnet CrSBr is a Quasi-1D Material

被引：82

作者：

Klein, Julian ^{[1
]}

Pingault, Benjamin ^{[3
,4
]}

Florian, Matthias ^{[5
]}

Heissenbuettel, Marie-Christin ^{[6
]}

Steinhoff, Alexander ^{[7
,8
]}

Song, Zhigang ^{[3
]}

Torres, Kierstin ^{[1
]}

Dirnberger, Florian ^{[9
]}

Curtis, Jonathan B. ^{[2
,3
]}

Weile, Mads ^{[10
]}

Penn, Aubrey ^{[11
]}

Deilmann, Thorsten ^{[6
]}

Dana, Rami ^{[1
]}

Bushati, Rezlind ^{[9
,12
]}

Quan, Jiamin ^{[13
,14
]}

Luxa, Jan ^{[15
]}

Sofer, Zdenek ^{[15
]}

Alu, Andrea ^{[13
,14
]}

Menon, Vinod M. ^{[9
,12
]}

Wurstbauer, Ursula ^{[16
,17
]}

Rohlfing, Michael ^{[6
]}

Narang, Prineha ^{[2
,3
]}

Loncar, Marko ^{[3
]}

Ross, Frances M. ^{[1
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[2] Univ Calif Los Angeles, Coll Letters & Sci, Los Angeles, CA 90095 USA

[3] Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[4] Delft Univ Technol, QuTech, NL-2600 GA Delft, Netherlands

[5] Univ Michigan, Dept Elect & Comp Engn, Dept Phys, Ann Arbor, MI 48109 USA

[6] Westfalische Wilhelms Univ Munster, Inst Festkorpertheorie, D-48149 Munster, Germany

[7] Univ Bremen, Inst Theoret Phys, D-28334 Bremen, Germany

[8] Univ Bremen, Bremen Ctr Computat Mat Sci, D-28359 Bremen, Germany

[9] CUNY City Coll, Dept Phys, New York, NY 10031 USA

[10] Tech Univ Denmark, Ctr Visualizing Catalyt Proc VIS, Dept Phys, DK-2800 Lyngby, Denmark

[11] MIT, MIT Nano, Cambridge, MA 02139 USA

[12] CUNY, Grad Ctr, Dept Phys, New York, NY 10016 USA

[13] CUNY, Adv Sci Res Ctr, Photon Initiat, New York, NY 10031 USA

[14] CUNY, Grad Ctr, Phys Program, New York, NY 10026 USA

[15] Univ Chem & Technol Prague, Dept Inorgan Chem, Prague 16628 6, Czech Republic

[16] Univ Munster, Inst Phys, D-48149 Munster, Germany

[17] Univ Munster, Ctr Nanotechnol, D-48149 Munster, Germany

来源：

ACS NANO | 2023年 / 17卷 / 06期

基金：

新加坡国家研究基金会; 欧盟地平线“2020”;

关键词：

CrSBr; van der Waals magnetic semiconductor; quasi-1D material; electron-phonon coupling; exciton-phonon coupling; anisotropic dielectric screening; van Hove singularity; GENERALIZED GRADIENT APPROXIMATION; ELECTRONIC-PROPERTIES; QUANTUM; CRYSTAL; FERROMAGNETISM; PARTICLE; SOLIDS; ATOMS; STATE; GAS;

D O I：

10.1021/acsnano.2c07316

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Correlated quantum phenomena in one-dimen-sional (1D) systems that exhibit competing electronic and magnetic order are of strong interest for the study of fundamental interactions and excitations, such as Tomonaga???Luttinger liquids and topological orders and defects with properties completely different from the quasiparticles expected in their higher-dimensional counterparts. However, clean 1D electronic systems are difficult to realize experimentally, particularly for magnetically ordered systems. Here, we show that the van der Waals layered magnetic semiconductor CrSBr behaves like a quasi-1D material embedded in a magnetically ordered environment. The strong 1D electronic character originates from the Cr???S chains and the combination of weak interlayer hybridization and anisotropy in effective mass and dielectric screening, with an effective electron mass ratio of mXe/mYe ??? 50. This extreme anisotropy experimentally manifests in strong electron???phonon and exciton???phonon interactions, a Peierls-like structural instability, and a Fano resonance from a van Hove singularity of similar strength to that of metallic carbon nanotubes. Moreover, because of the reduced dimensionality and interlayer coupling, CrSBr hosts spectrally narrow (1 meV) excitons of high binding energy and oscillator strength that inherit the 1D character. Overall, CrSBr is best understood as a stack of weakly hybridized monolayers and appears to be an experimentally attractive candidate for the study of exotic exciton and 1D-correlated many-body physics in the presence of magnetic order.

引用

页码：5316 / 5328

页数：13

共 76 条

[31] Single layer of MX3 (M = Ti, Zr; X = S, Se, Te): a new platform for nano-electronics and optics [J].