Physics 838 Graduate Student Seminar

In 1990, a seminar was initiated for QMC (formerly CNAM/CSR) graduate students in order to present their research to the other students, postdocs, and faculty in the Center. In addition to fostering a rich, collaborative environment in which students learn about the breadth and scope of research being done in QMC, the idea of this series is to teach several crucial skills to our students:

1) How to present their research in a clear and time-efficient way to an audience that was not expert in their area of research;

2) How to best answer questions during their presentations;

3) How to ask good questions when in an audience (or interview), in particular about research beyond their own narrow PhD topic.

In this seminar, students submit formalized feedback to each weekly presenter, providing informative information about presentation style, research content and tips for improvement.

Best Speaker Awards

At the end of each term, a cash prize award is given for the best student and postdoc presentations based on class feedback scores. Previous winners are listed here:

2025 (spring)  Jarryd Horn (student)

2024 (fall) Jared Erb (student)

2023 (fall) Jared Erb (student), Peter Czajka (postdoc)

2022 (fall) Sungha Baek (student), Keenan Avers (postdoc)

2020 (fall) Shukai Ma 

2019 (spring) Rui Zhang (student), Tarapada Sarkar (postdoc)

2018 (fall) Chris Eckberg (student), Jen-Hao Yeh (postdoc)

2015 Paul Syers, Jasper Drisko

2014 Sean Fackler, Paul Syers,

2013 Kevin Kirshenbaum, Kirsten Burson

2012 Baladitya Suri, Kristen Burson

2011 (fall) Sergii Pershoguba, Ted Thorbeck

2011 (spring) Anirban Gangopadhyay, Baladitya Suri

2010 (fall) Christian J. Long, Tomasz M. Kott

2010 (spring) Tomasz M. Kott, Kevin Kirshenbaum

2009 (fall) Arun Luykx, Jen-Hao Yeh

PHYS838C Seminar: Jared Dans

Calendar
Physics 838 Seminar
Date
11.17.2025 4:00 pm - 5:00 pm
Location
Rm 1201 John S Toll Physics Bldg

Description



Title: Superconductivity and Quantum Oscillations in YPtBi Under Pressure

Abstract: The half-Heusler RPtBi series is home to a variety of magnetic and superconducting compounds. The nonmagnetic members are especially interesting as they are thought to host topologically non-trivial band structures. The semimetal YPtBi has gathered much interest as an exciting platform for unconventional superconductivity, with a robust superconducting state that is nearly unaffected by disorder and changes in carrier density spanning three orders of magnitude. Furthermore, DFT calculations and quantum oscillation measurements point to the existence of states with j=3/2 total angular momentum near the Fermi level, which could allow exotic, high-spin pairing states. An important tool for studying unconventional superconductivity in these systems is the application of hydrostatic pressure. While YPtBi has been studied extensively since its discovery as a superconductor, its behavior under pressure has remained relatively underexplored, with little done to investigate its electronic structure under pressure. Here, we present magnetotransport data taken on high-purity, semimetallic YPtBi under pressure, and discuss the effects of pressure on the resistivity, quantum oscillations, and superconducting transition in YPtBi.


Advisor: Paglione