Featured Research

from universities, journals, and other organizations

Researcher aids understanding of collective excitations in MoS2

Date:
May 21, 2014
Source:
World Scientific
Summary:
The large direct band gap in a monolayer of MoS2 leads to the appearance of the interband dipolar mode which couples to the intraband plasmon. This result is useful for our understanding of the collective excitations in MoS2. The renormalized dipolar mode is close to its bare value, while coupling suppresses the plasmon mode.

The large direct band gap in a monolayer of MoS2 leads to the appearance of the interband dipolar mode which couples to the intraband plasmon. This result is useful for our understanding of the collective excitations in MoS2. The renormalized dipolar mode is close to its bare value, while coupling suppresses the plasmon mode.

Related Articles


Dr. Željana Bonačić Lošić from the Department of Physics, Faculty of Science at the University of Split, Croatia, has studied the coupling of plasmon and dipolar collective modes in a monolayer of molybdenum disulfide. Collective excitations play a key role in describing any many-body quantum system. A monolayer of molybdenum disulfide is a promising two-dimensional material that has attracted much attention lately because of its potential applications. In this sense, the investigation of its electronic properties is of special interest. The large direct band gap in a monolayer of MoS2 separating the valence and conduction bands leads to the appearance of the interband dipolar mode which couples to the intraband plasmon.

This results in two hybridized modes. The renormalized dipolar mode is close to its bare value, while coupling suppresses the plasmon mode. Also, the obtained modes are responsible for the appearance of dispersing peaks in the energy-loss function. This result is useful for our understanding of the collective excitations in MoS2.

"Our calculated collective mode peaks in the energy-loss function should be directly observable in momentum-resolved low energy electron energy-loss spectroscopy (EELS) as previously observed plasmon peak in graphene," says Dr. Željana Bonačić Lošić.

The report appears in Modern Physics Letters B.


Story Source:

The above story is based on materials provided by World Scientific. Note: Materials may be edited for content and length.


Journal Reference:

  1. Željana Bonačić Lošić. Coupling of plasmon and dipolar modes in a monolayer of MoS2. Modern Physics Letters B, 2014; 28 (12): 1450099 DOI: 10.1142/S0217984914500997

Cite This Page:

World Scientific. "Researcher aids understanding of collective excitations in MoS2." ScienceDaily. ScienceDaily, 21 May 2014. <www.sciencedaily.com/releases/2014/05/140521095108.htm>.
World Scientific. (2014, May 21). Researcher aids understanding of collective excitations in MoS2. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2014/05/140521095108.htm
World Scientific. "Researcher aids understanding of collective excitations in MoS2." ScienceDaily. www.sciencedaily.com/releases/2014/05/140521095108.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
3D Printed Cookies Just in Time for Christmas

3D Printed Cookies Just in Time for Christmas

Reuters - Innovations Video Online (Dec. 18, 2014) A tech company in Spain have combined technology with cuisine to develop the 'Foodini', a 3D printer designed to print the perfect cookie for Santa. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
First Etihad Superjumbo Flight in December

First Etihad Superjumbo Flight in December

AFP (Dec. 18, 2014) The first flight of Etihad Airways' long-awaited Airbus A380 superjumbo will take place later in December, the Abu Dhabi carrier said Thursday, also announcing its first Boeing 787 Dreamliner route. Duration: 01:09 Video provided by AFP
Powered by NewsLook.com
Ford Expands Air Bag Recall Nationwide

Ford Expands Air Bag Recall Nationwide

Newsy (Dec. 18, 2014) The automaker added 447,000 vehicles to its recall list, bringing the total to more than 502,000. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins