In bulk semiconductor band structure calculations, it is assumed that the crystal lattice (which features a periodic potential due to the atomic structure) of the material is infinite. When the finite size of a crystal is taken into account, the wavefunctions of electrons are altered and states that are forbidden within the bulk semiconductor gap are allowed at the surface. Similarly, when a metal is deposited onto a semiconductor (by thermal evaporation, for example), the wavefunction of an electron in the semiconductor must match that of an electron in the metal at the interface. Since the Fermi levels of the two materials must match at the interface, there exists gap states that decay deeper into the semiconductor. (Wikipedia).
Imperfections and defects are unavoidable. These defects are driven by entropy since they increase the disorder of a system. In metals, defects can be vacancies or interstitials. Vacancies are empty sites in the lattice. Interstitials are when atoms occupy the sites between atoms (intersti
From playlist Materials Sciences 101 - Introduction to Materials Science & Engineering 2020
Chemistry - Mutual Displacement Reaction & Chemical Equations (10 of 38) Reaction IV
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain and give an example of the 3rd chemical reaction or displacement reaction (mutual displacement).
From playlist CHEMISTRY 7 CONCENTRATION, REACTANTS, PRODUCTS
IB Chemistry Topic 4.5 Metallic bonding
IB Chemistry Topic 4.5 Metallic bonding How the metallic bond explains the various properties of metals and alloys PPTs and quizzes are available on http://www.mrwengibchemistry.com/ 0:11 Definition of metallic bond 0:30 Strength of metallic bond and properties 2:15 Alloys 2:42 Topic 4 b
From playlist Topic 4/14 Chemical structure and bonding
Intrinsic semiconductors are pure, stoichiometric materials that have not been doped with additional compounds in order to modify their electrical conductivity. The band gap of these materials increases as we move from group IV materials like silicon and germanium to III-V (GaAs etc) and I
From playlist Materials Sciences 101 - Introduction to Materials Science & Engineering 2020
What Are Covalent Bonds | Properties of Matter | Chemistry | FuseSchool
What Are Covalent Bonds | Properties of Matter | Chemistry | FuseSchool Learn the basics about covalent bonds, when learning about properties of matter. When similar atoms react, like non-metals combining with other non-metals, they share electrons. This is covalent bonding. Non-metals
From playlist CHEMISTRY
Year 10 Science Chemical Reactions Corrosion and Corrosion prevention
From playlist 10 - Chemistry
Correlation induced metallic, half-metallic and superconducting by H. R. Krishnamurthy
DISCUSSION MEETING NOVEL PHASES OF QUANTUM MATTER ORGANIZERS: Adhip Agarwala, Sumilan Banerjee, Subhro Bhattacharjee, Abhishodh Prakash and Smitha Vishveshwara DATE: 23 December 2019 to 02 January 2020 VENUE: Ramanujan Lecture Hall, ICTS Bangalore Recent theoretical and experimental
From playlist Novel Phases of Quantum Matter 2019
Liquid Metal Embrittlement - Gallium vs. Aluminium
Bringing gallium and aluminium together has some interesting and occasionally rather explosive results, as Dan found out in this little tale from the prep room. Subscribe for regular science videos: http://bit.ly/RiSubscRibe Liquid metal embrittlement is a phenomenon where ductile metals,
From playlist Tales from the Prep Room
Unconventional superconductivity in half-filled ionic Hubbard model: Role of magnetic...by Arti Garg
PROGRAM FRUSTRATED METALS AND INSULATORS (HYBRID) ORGANIZERS Federico Becca (University of Trieste, Italy), Subhro Bhattacharjee (ICTS-TIFR, India), Yasir Iqbal (IIT Madras, India), Bella Lake (Helmholtz-Zentrum Berlin für Materialien und Energie, Germany), Yogesh Singh (IISER Mohali, In
From playlist FRUSTRATED METALS AND INSULATORS (HYBRID, 2022)
Field Induced Quantum Phase Transitions in one-Dimensional Spin...by Ramesh Chandra Nath
PROGRAM FRUSTRATED METALS AND INSULATORS (HYBRID) ORGANIZERS Federico Becca (University of Trieste, Italy), Subhro Bhattacharjee (ICTS-TIFR, India), Yasir Iqbal (IIT Madras, India), Bella Lake (Helmholtz-Zentrum Berlin für Materialien und Energie, Germany), Yogesh Singh (IISER Mohali, In
From playlist FRUSTRATED METALS AND INSULATORS (HYBRID, 2022)
Energy bands and band gaps in materials
Isolated atoms have energy levels corresponding to s, p, d, f orbitals etc. However, as we bring atoms close together we have to worry about overlap leading to multiple electrons having the same quantum numbers. This would violate pauli exclusion principle!! Instead, we have to slightly ch
From playlist Materials Sciences 101 - Introduction to Materials Science & Engineering 2020
Quantum Transport, Lecture 20: Majorana fermions
Instructor: Sergey Frolov, University of Pittsburgh, Spring 2013 http://sergeyfrolov.wordpress.com/ Summary: Kitaev's model, Majorana's in nanowires, experimental results from Delft. Quantum Transport course development supported in part by the National Science Foundation under grant DMR C
From playlist Quantum Transport
Chemistry - Oxidation-Reduction Reaction (2 of 19) The Half Reaction
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is a half reaction, example MgO.
From playlist CHEMISTRY 20 OXIDATION REDUCTION REACTIONS
Spinons and magnetization plateaus in s=1/2 Kagome antfierromagnet YCu3(OH)6+xBr3-x -Kwang Yong Choi
PROGRAM FRUSTRATED METALS AND INSULATORS (HYBRID) ORGANIZERS Federico Becca (University of Trieste, Italy), Subhro Bhattacharjee (ICTS-TIFR, India), Yasir Iqbal (IIT Madras, India), Bella Lake (Helmholtz-Zentrum Berlin für Materialien und Energie, Germany), Yogesh Singh (IISER Mohali, In
From playlist FRUSTRATED METALS AND INSULATORS (HYBRID, 2022)
Two Terminal Charge Tunneling: A Sanity Check for Manjorana zero modes by Sumanta Tewari
Open Quantum Systems DATE: 17 July 2017 to 04 August 2017 VENUE: Ramanujan Lecture Hall, ICTS Bangalore There have been major recent breakthroughs, both experimental and theoretical, in the field of Open Quantum Systems. The aim of this program is to bring together leaders in the Open Q
From playlist Open Quantum Systems
Tailoring Topological Phases: A Materials Perspective by Tanusri Saha-Dasgupta
DISCUSSION MEETING NOVEL PHASES OF QUANTUM MATTER ORGANIZERS: Adhip Agarwala, Sumilan Banerjee, Subhro Bhattacharjee, Abhishodh Prakash and Smitha Vishveshwara DATE: 23 December 2019 to 02 January 2020 VENUE: Ramanujan Lecture Hall, ICTS Bangalore Recent theoretical and experimental
From playlist Novel Phases of Quantum Matter 2019
Superconductors and semiconductors, nanowires and majorana, research and integrity
Sergey Frolov, University of Pittsburgh This talk will be on three topics, but in a way it is one. My research focus and passion is the proximity effect. It is when superconducting correlations are induced in a non-superconducting material. Because superconductivity is always tied to a sp
From playlist Sergey Frolov's talks
Nonlocal transport in InAs/GaSb composite quantum well: by Atindra Nath Pal
Date & Time: 17 February 2017 to 19 February 2017 VENUE: Ramanujan Lecture Hall, ICTS, Bengaluru This is an annual discussion meeting of the Indian statistical physics community which is attended by scientists, postdoctoral fellows, and graduate students, from across the country, working
From playlist Indian Statistical Physics Community Meeting 2017
Quantum Transport, Lecture 16: Superconducting qubits
Instructor: Sergey Frolov, University of Pittsburgh, Spring 2013 http://sergeyfrolov.wordpress.com/ Summary: quantum electrical circuits - flux qubits, phase qubits and charge qubits. Quantum Transport course development supported in part by the National Science Foundation under grant DMR
From playlist Quantum Transport
Curly strips of zinc and magnesium are dropped into 2M hydrochloric acid, and bubbles of hydrogen gas are observed as a result of the reactions. For more details on our setup, see https://sciencedemonstrations.fas.harvard.edu/presentations/metals-acid Thanks for watching!
From playlist Chemistry