Thermal Conductivity of Monolayer Molybdenum Disulfide Obtained from Temperature-Dependent Raman Spectroscopy

Yan, Rusen; Simpson, J. R.; Bertolazzi, Simone; Brivio, Jacopo; Watson, Michael; Wu, Xing; Kis, András; Luo, Tengfei; Walker, Angela R. Hight; Xing, Huili Grace

doi:10.1021/nn405826k

Cited by 692 publications

(784 citation statements)

References 39 publications

Supporting

Mentioning

705

Contrasting

Unclassified

Order By: Relevance

“…Using temperature-dependent Raman spectroscopy on suspended sheets, Yan et al 32 extracted the thermal conductivity of single-layer MoS 2 (∼34.5 W/mK), which was found to be significantly lower than that of graphene. Buscema et al 33 measured the Seebeck coefficient in back-gated MoS 2 transistors and obtained a large tunable value, which could be varied between −4 × 10 2 μV/K and −1 × 10 5 μV/K by a gate voltage.…”

Section: ■ Thermal Propertiesmentioning

confidence: 99%

Single-Layer MoS₂ Electronics

2015

Self Cite

View full text Add to dashboard Cite

CONSPECTUS: Atomic crystals of two-dimensional materials consisting of single sheets extracted from layered materials are gaining increasing attention. The most well-known material from this group is graphene, a single layer of graphite that can be extracted from the bulk material or grown on a suitable substrate. Its discovery has given rise to intense research effort culminating in the 2010 Nobel Prize in physics awarded to Andre Geim and Konstantin Novoselov. Graphene however represents only the proverbial tip of the iceberg, and increasing attention of researchers is now turning towards the veritable zoo of so-called "other 2D materials". They have properties complementary to graphene, which in its pristine form lacks a bandgap: MoS 2 , for example, is a semiconductor, while NbSe 2 is a superconductor. They could hold the key to important practical applications and new scientific discoveries in the two-dimensional limit. This family of materials has been studied since the 1960s, but most of the research focused on their tribological applications: MoS 2 is best known today as a high-performance dry lubricant for ultrahigh-vacuum applications and in car engines. The realization that single layers of MoS 2 and related materials could also be used in functional electronic devices where they could offer advantages compared with silicon or graphene created a renewed interest in these materials. MoS 2 is currently gaining the most attention because the material is easily available in the form of a mineral, molybdenite, but other 2D transition metal dichalcogenide (TMD) semiconductors are expected to have qualitatively similar properties. In this Account, we describe recent progress in the area of single-layer MoS 2 -based devices for electronic circuits. We will start with MoS 2 transistors, which showed for the first time that devices based on MoS 2 and related TMDs could have electrical properties on the same level as other, more established semiconducting materials. This allowed rapid progress in this area and was followed by demonstrations of basic digital circuits and transistors operating in the technologically relevant gigahertz range of frequencies, showing that the mobility of MoS 2 and TMD materials is sufficiently high to allow device operation at such high frequencies. Monolayer MoS 2 and other TMDs are also direct band gap semiconductors making them interesting for realizing optoelectronic devices. These range from simple phototransistors showing high sensitivity and low noise, to light emitting diodes and solar cells. All the electronic and optoelectronic properties of MoS 2 and TMDs are accompanied by interesting mechanical properties with monolayer MoS 2 being as stiff as steel and 30× stronger. This makes it especially interesting in the context of flexible electronics where it could combine the high degree of mechanical flexibility commonly associated with organic semiconductors with high levels of electrical performance. All these results show that MoS 2 and TMDs are promising materials for elect...

show abstract

Section: ■ Thermal Propertiesmentioning

confidence: 99%

Single-Layer MoS₂ Electronics

2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…The key idea of this method is to construct a phonon wave packet from a single branch of the phonon dispersion curve with a narrow frequency range and well-defined polarization. 10 Upon encounter with an interface, the wave packet is scattered into transmitted and reflected waves. By computing the ratio of the amplitudes of transmitted (A tr ) over initial (A) phonon waves at the interface, the energy transmission coefficient α can be determined by:…”

Section: In-plane Interfacial Binding Between Mos 2 and Graphenementioning

confidence: 99%

MoS2-graphene in-plane contact for high interfacial thermal conduction

et al. 2017

View full text Add to dashboard Cite

Recent studies showed that the in-plane and inter-plane thermal conductivities of twodimensional (2D) MoS 2 are low, posing a significant challenge in heat management in MoS 2 -based electronic devices. To address this challenge, we design the interfaces between MoS 2 and graphene by fully utilizing graphene, a 2D material with an ultra-high thermal conduction. We first perform ab initio atomistic simulations to understand the bonding nature and structure stability of the interfaces. Our results show that the designed interfaces, which are found to be connected together by strong covalent bonds between Mo and C atoms, are energetically stable.We then perform molecular dynamics simulations to investigate the interfacial thermal conductance. It is found surprisingly that the interface thermal conductance is high, comparable to that of graphene-metal covalent-bonded interfaces. Importantly, each interfacial Mo-C bond serves as an independent thermal channel, enabling the modulation of interfacial thermal conductance by controlling Mo vacancy concentration at the interface. The present work provides a viable route for heat management in MoS 2 based electronic devices.2

show abstract

“…Recently, there have been reports of low lattice thermal conductivity for MoS 2 and WS 2 and a high power factor for MoS 2 . In these preliminary works, the experimentally measured value of lattice thermal conductivity of few-layer MoS 2 has been reported to be below 55.0 Wm −1 K −1 [20][21][22], and those of single-and doublelayer WS 2 [23], respectively. These room-temperature values, around two orders smaller than the lattice thermal conductivity of single-layer graphene, have been reproduced by classical molecular dynamics (MD) and first-principles calculations [24][25][26][27][28][29][30][31] as well.…”

Section: Introductionmentioning

confidence: 96%

Thermal transport properties of MoS₂and MoSe₂monolayers

et al. 2016

View full text Add to dashboard Cite

The isolation of single-to few-layer transition metal dichalcogenides opens new directions in the application of two-dimensional materials to nanoelectronics. The characterization of thermal transport in these new low-dimensional materials is needed for their efficient implementation, either for general overheating issues or specific applications in thermoelectric devices. In this study, the lattice thermal conductivities of single-layer MoS 2 and MoSe 2 are evaluated using classical molecular dynamics methods. The interactions between atoms are defined by StillingerWeber-type empirical potentials that are developed to represent the structural, mechanical, and vibrational properties of the given materials. In the parameterization of the potentials, a stochastic optimization algorithm, namely particle swarm optimization, is utilized. The final parameter sets produce quite consistent results with density functional theory in terms of lattice parameters, bond distances, elastic constants, and vibrational properties of both single-layer MoS 2 and MoSe 2 . The predicted thermal properties of both materials are in very good agreement with earlier firstprinciples calculations. The discrepancies between the calculations and experimental measurements are most probably caused by the pristine nature of the structures in our simulations.S Online supplementary data available from stacks.iop.org/nano/27/055703/mmedia

show abstract

Thermal Conductivity of Monolayer Molybdenum Disulfide Obtained from Temperature-Dependent Raman Spectroscopy

Cited by 692 publications

References 39 publications

Single-Layer MoS₂ Electronics

Single-Layer MoS₂ Electronics

MoS2-graphene in-plane contact for high interfacial thermal conduction

Thermal transport properties of MoS₂and MoSe₂monolayers

Contact Info

Product

Resources

About

Thermal Conductivity of Monolayer Molybdenum Disulfide Obtained from Temperature-Dependent Raman Spectroscopy

Cited by 692 publications

References 39 publications

Single-Layer MoS2 Electronics

Single-Layer MoS2 Electronics

MoS2-graphene in-plane contact for high interfacial thermal conduction

Thermal transport properties of MoS2and MoSe2monolayers

Contact Info

Product

Resources

About

Single-Layer MoS₂ Electronics

Single-Layer MoS₂ Electronics

Thermal transport properties of MoS₂and MoSe₂monolayers