TCM
UoC crest

Postgraduate admissions

The Theory of Condensed Matter group usually accepts a little over half a dozen PhD students each year.

Research areas include Electronic Structure Computation, Soft Condensed Matter, Statistical Physics, Collective Phenomena, Strongly Correlated Systems and Biophysics. Two posters containing areas of current interest and examples of PhD projects are available here: Poster 1 and Poster 2.

There is no rigid list of projects available. Prospective applicants are strongly encouraged to contact potential supervisors whose research is of interest. Even if you do not receive a reply, such an approach is often a useful first step.

Staff who are potentially interested in applicants for the next academic year are: Drs Ahnert, Castelnovo, Conduit, Lamacraft, Morris, Nunnenkamp, Teichmann, and Profs Artacho, Cooper, Needs, Payne, Simons, Warner. However, please note that any Principal Investigator in the group can supervise postgraduate students.

Examples of PhD projects for students admitted to the academic year 2017-18

Prof. Needs: The structures of some materials are stabilised by anharmonic nuclear motion. If the vibrations in a structure stabilised in this way were to be magically `switched off' it would relax to a quite different structure. Such behaviour can only occur when the vibrations are strongly coupled to one another. Structures stabilised by anharmonic vibrations may be close to instabilities which can lead, for example, to properties such as high-Tc superconductivity. The world record superconducting material H3S with a transition temperature of 200 K shows such behaviour. The aim of this project is to discover new structures that are stabilised by anharmonic motion and to determine whether they show interesting and unusual properties.

Dr Nunnenkamp: I would like to offer PhD projects in the broad area of quantum coherence in atomic, mesoscopic, and optical systems, including ultracold atomic gases, superconducting circuits, and cavity optomechanics.

Prof. Cooper: `Topological Phases of Matter' -- the project shall explore novel topological phases of matter in experimentally relevant settings, both in solid state systems and in ultracold atomic gases. Key challenges include the calculation of the energetic stability of these phases in strongly interacting quantum many-particle systems, and the prediction of their observable experimental consequences.
Key-words: Topological Quantum Phases; Cold Atomic Gases

Dr Morris: Ab initio battery materials discovery; Defects in simple oxides and semiconductors; Modelling disorder. (For more information, please visit: https://wiki.cam.ac.uk/ajmorris/Projects)

Dr Castelnovo: I plan to offer PhD projects at the interface between itinerant and frustrated systems. On the one hand, frustrated systems (e.g., spin liquids) can exhibit collective excitations that behave like itinerant quasiparticles. I would like to model and understand their behaviour out of equilibrium, which is to date poorly understood, specially at the quantum mechanical level. On the other hand, frustration sometimes coexists with itinerant electrons, e.g., in pyrochlore iridate materials. Through simulations and analytical calculations I would like to investigate how the two phenomena couple and affect one another.

Dr Conduit: proposes two projects, one in strongly correlated systems, and the second in electronic structure:

  1. The standard picture of superconductors is that the opposite spin particles attract and pair. However, in certain systems the "Cooper pair" could in fact be made from three or more particles. Using a combination of numerics and analytics we will explore the energetics and the properties of such a superconductor.
  2. New materials are essential to enable new technologies, but are currently discovered in an experimental driven process of trial and improvement that can take up to 20 years. This project will focus on the design of new materials using an innovative approach based on artificial intelligence. We merge experimental data and quantum mechanical computer calculations to take advantage of everything that is known about the material. The project will be in colaboration with BP scientists and will be run within the Centre for Doctoral Training in Computational Methods for Materials Science.

Dr Teichmann: I would like to offer PhD projects in the area of statistical physics models and machine learning applied to large biological data sets, including single cell genomics data. Some of this work will be done in collaboration with Ben Simons.

The application process

You must apply for graduate admission to the Physics Department. Relevant applications reach TCM for further selection, shortlisting, and interviews.

In your application, you should specify that you are interested in projects in TCM. You should also include the names of all potential supervisors that you are willing to consider working with. Ideally, these should be ranked in order of preference (the names and the ordering can later be altered at or shortly after the interview, if invited). Above in this same page you find a list of supervisors who are likely to look for postgraduate students this coming academic year.

There is no strict application deadline but TCM aims to hold at least two rounds of interviews, typically in late January and in late February of the academic year prior to the start of postgraduate studies. Departmental processing times can be long and applications should be submitted well in advance of the interview days.

Shortly after the interview, the applicants will be asked to provide a final ranked list of the supervisors they are willing to work with in TCM, which will form the basis for the final selection process before official offers are made.

TCM will continue to consider applications until all available positions have been filled. If you are unsure whether we are still accepting applications, please contact the TCM group administrator.

Further instructions

Your eligibility for funding from different sources will depend on your individual circumstances. Details can be found on the departmental website. Some of these sources have their own internal deadlines and you should make sure that your application is submitted in time.

Interview

TCM interviews of postgraduate applicants (by invitation only) are either conducted in person (where possible) or remotely (phone, Skype), by a panel. Interviews typically begin with a 10 minute presentation by the candidate on a project or extended piece of work they have recently completed, or on a research topic they are familiar with. This is followed by approximately 20 minutes of questions, not limited to the topic of the presentation.

Centre for Doctoral Training

Applicants interested in the computational materials modelling work of the group should also consult the (separate) admission procedure of the Centre for Doctoral Training in Computational Methods for Materials Science (the two applications are not mutually exclusive).