Electronic band structure

Supplemental information for “Colloidal Type-II CdS/ZnSe NCs : Synthesis, Electronic Structures, and Spectroscopic Properties” S.A. Ivanov, A. Piryatinski, J. Nanda, S. Tretiak, D. Werder, V. I. Klimov Theoretical model. To describe quantum states in a spherically symmetric Type-II core/shell nanocrystals (NC) characterized by the core radius R and the shell width H, we use effective mass approximation. We assume the existence of single energy bands for both electrons and holes. This assumption represents simplification compared to multi-band models that explicitly take into account mixing between, e.g., different valence sub-bands.1 However, this simplified approach still allows us to capture essential trends of core- and shell-size dependences…

One type of lasers are solid-state lasers, which include semiconductor lasers and their derivative, the quantum well laser. Semiconductor lasers utilize the properties of a P-N junction of semiconductor material. This P-N junction is a connection of a p-doped (electron-hole-doped) semiconductor material and n-doped (electron-doped) semiconductor material. When electric current through this junction is present, the electrons participating in the electric current are of an elevated energy state…

These musicians do not care about the conventional life of having a job and family, but instead focus on expressing their views in artistic ways through their music. In some cases, music was the only motivation of living for some musicians, especially in areas of unemployment and distress, where young people had very limited opportunities. This was the reason why a stereotype developed, considering musicians depressed and low-life individuals who were not contributing to society. Not bound by…

Seven years of my life I played an instrument in a band for my hometown of Watertown, WI; little did I know that I would learn much more than playing music. Band Ensemble is a group I was motivated to join because of my brother and friends. After I joined the group and began playing the tuba, I always felt like I had a place. Being in band, I felt like I was a part of my community. First, I was drawn to band because I was interested in being a part of a team. Band was a lot of people coming…

This is when I joined my first real band with a couple of college kids from my surrounding area. Those next 6 months of my life are to this day, the most important to date. In February of 2007, after months of playing shows on the weekends and practicing every night with my new band, things started to pick up. The band wanted to start touring full time but I was the only member still in school. We also had mention of a record deal coming down the pipeline. I finally said screw it and when I came…

The Classical music performance had an order to it in the way the musicians walk out, sit down and how they played. The crowd would be very respectful and professional while watching the orchestra. The crowd would clap when need and would be quiet when needed. The orchestra would perform in a beautiful theater not outside on an open stage like a rock concert. A rock concert differs from that of a classical performs. The band usually has no order to way the play. They just kind of all walk on…

This I Believe What makes a person believe in something? A powerful moment, tragic loss, or sign from above are all things that can cause people to have a deeper understanding of their life. In particular, an influencing moment caused me to realize some things about an area of my life that were not clear before. Due to this moment, I now strongly believe in the power of spotlight. I am a member of the varsity show choir group called Express at my school. Being apart of this group has…

In high school, I remember where my biggest dream changed into a reality. I was a member of the Greenville High School Tiger Pride Marching Band. I played the alto saxophone. Unlike my bandmates, I did not know how to read music then. I played by ear, and whatever scale, jazz run, or chromatic I heard, I could play it back just like that. I played at numerous of black history programs and different events at school. My favorite saxophonist was Kenneth Williams, and I told myself that I want to…

He has since than been playing the instrument for 25 plus years. James told me the person who influenced him to play the bass guitar was “Les Clay Pool,” from the band called “Primus”. His first performance was when he was 19 years old. He played with his very first band named (IN) which was a punk rock band. They performed at a bar named the “Token Lounge,” which is located in Westland, MI. During his time as a musician he’s played many shows. His favorite gigs to play are outdoor festivals.…

different races and cultures. This is because of emotions. According to Roger Cross (2013), everyone has something called emotional intelligence (p. 22). Emotional intelligence pertains to how people feel to certain pieces of music. This is beginning to be necessary to promote sustainable values and behaviors among all cultures. Music education is supposed to focus on the multicultural issues in music due to the diversity in the music that is obtained by the director and handed to the…