home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.materials
- Path: sparky!uunet!email!email!sala
- From: sala@eueh24.tuwien.ac.at (Cristiano Sala)
- Subject: Re: Heterojunction bandstructure calculations
- In-Reply-To: vcm@ccwf.cc.utexas.edu's message of 8 Nov 92 18: 12:58 GMT
- Message-ID: <SALA.92Nov11114451@eueh24.tuwien.ac.at>
- Sender: news@email.tuwien.ac.at
- Nntp-Posting-Host: eueh24.tuwien.ac.at
- Organization: Institute for Microelectronics, TU Vienna, Austria
- References: <1992Nov4.192627@IASTATE.EDU> <83220@ut-emx.uucp>
- Date: Wed, 11 Nov 1992 10:44:51 GMT
- Lines: 58
-
- >>>>> On 8 Nov 92 18:12:58 GMT, vcm@ccwf.cc.utexas.edu (V. Chandramouli) said:
-
- V.> In article <1992Nov5.081229.2190@nntp.hut.fi> you write:
- >
- > Howdy,
- >
- > Does anybody know where to get simulation programs to do bandstructure
- >and carrier density calculations for hetrostructures, preferably for ones
- >containing several stacked quantum wells ? We have one written here in HUT,
- >but it only handles one half-well, not a set of complete wells ( a super-
- >lattice) or eg. two interacting wells.
- >
- > Thanks,
- > Mikko Kiviranta
- >
-
- V.> I am interested in your model -- can I have a copy of it ?
-
- V.> For stacked quantum wells, I am aware of several papers in the
- V.> literature that describes how to calculate the band structure.
- V.> If you are interested in heterostructure device simulation you should
- V.> consult the software from Purdue University (Mark Lundstrom's group)
- V.> called PUPHS. This program can (I think) calculate carrier
- V.> densities in a heterostructure. If you need more information on
- V.> the contact e-mail address and bibliography please send me an
- V.> e-mail (mouli@emx.cc.utexas.edu).
- V.> Chandramouli. mouli@emx.cc.utexas.edu
- V.> ---------------------------------------------------------------------
- V.> Microelectronics Research Center in the University of Texas at Austin
- V.> ---------------------------------------------------------------------
-
- This might be relevant:
-
- Here at the IuE we are working, amongst other things, on extending our
- device simulator MINIMOS to HEMTs and MODFETs. In order to have a
- validation tool against which to gauge pre-release simulations, a
- co-worker and I wrote a standalone self-consistent
- Schroedinger-Poisson solver which can handle an arbitrary number of
- heterolayers. As well as carrier densities and bandstructures, it
- works out capacitance-voltage curves, has incomplete donor ionization,
- exchange-correlation effects (sort of) and an educated initial guess
- for single-well heterostructures. I ought to add as a caveat that the
- code (well, my part of it at least) is a typical research product,
- i.e. ugly, inefficient and a wonderful example of feet-first
- programming. Moreover, it has been used principally to work out C-V
- curves for HEMTs, and as such has not had much experience with
- superlattices and/or multiple quantum wells.
-
- Still, E-mail me if you are interested.
-
- Cristiano
-
-
-
- --
-
- Cristiano Sala sala@iue.tuwien.ac.at
- Practice random kindness and senseless acts of beauty
-